Pub Date : 2024-12-01DOI: 10.1016/j.biocontrol.2024.105656
Gabriele Rondoni , Jana Collatz , Mattias Jonsson , Oskar Rennstam Rubbmark , Eric W. Riddick , Jason M. Schmidt , Jacques Brodeur
This Special Issue presents articles that combine traditional approaches, novel experimental methods, and advanced techniques, to provide a more in-depth understanding of trophic interactions in biological control. Studies mainly cover behavioural and chemical ecology, molecular ecology using PCR, qPCR and high-throughput sequencing, population genetics, automated deep learning image analysis and photo trapping. Through laboratory and field investigations, articles provide novel insights into host/prey specificity of natural enemies, their multitrophic interactions, and how they behave in space and time. Ultimately, results may be useful for the development of management strategies that aim to improve biocontrol effectiveness against native and invasive herbivorous insects.
{"title":"Recent advances in characterizing trophic connections in biological control","authors":"Gabriele Rondoni , Jana Collatz , Mattias Jonsson , Oskar Rennstam Rubbmark , Eric W. Riddick , Jason M. Schmidt , Jacques Brodeur","doi":"10.1016/j.biocontrol.2024.105656","DOIUrl":"10.1016/j.biocontrol.2024.105656","url":null,"abstract":"<div><div>This Special Issue presents articles that combine traditional approaches, novel experimental methods, and advanced techniques, to provide a more in-depth understanding of trophic interactions in biological control. Studies mainly cover behavioural and chemical ecology, molecular ecology using PCR, qPCR and high-throughput sequencing, population genetics, automated deep learning image analysis and photo trapping. Through laboratory and field investigations, articles provide novel insights into host/prey specificity of natural enemies, their multitrophic interactions, and how they behave in space and time. Ultimately, results may be useful for the development of management strategies that aim to improve biocontrol effectiveness against native and invasive herbivorous insects.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"199 ","pages":"Article 105656"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.biocontrol.2024.105664
Shailesh S. Sawant , Sarika R. Bhapkar , Euddeum Choi , Byulhana Lee , Janghoon Song , Young Sik Jo , YoSup Park , Ho-Jin Seo
White root rot, caused by the fungal pathogen Dematophora necatrix (syn. Rosellinia necatrix), poses a threat to crops worldwide, leading to substantial economic losses. Biological control using antagonistic fungi, such as Trichoderma spp., has emerged as a promising alternative to chemical fungicides in fungal disease management. In this study, we investigated the potential of three Trichoderma species, Trichoderma harzianum strain 40788 from the Korean Agriculture Culture Collection (KACC), T. atroviride (KACC 43393), and T. asperellum (KACC 43821), as biocontrol agents against four R. necatrix strains (KACC 40446, 40445, 40447, and 40168). Dual-culture assays revealed that T. harzianum (KACC 40788) and T. atroviride (KACC 43393) rapidly inhibited mycelial growth, achieving up to 80% suppression of strains KACC 40445 and KACC 40446, whereas T. asperellum (KACC 43821) exhibited lower inhibition. In volatile antibiotic production assays, volatile metabolites produced by T. harzianum (KACC 40788) and T. atroviride (KACC 43393) inhibited mycelial growth of R. necatrix strains KACC 40445 and KACC 40446 by 76.52 and 74.70%, respectively. Microscopic analysis of mycoparasitism revealed that Trichoderma strains adhered to, coiled around, and lysed R. necatrix mycelia. Finally, greenhouse trials demonstrated that T. harzianum and T. atroviride treatment significantly reduced white root rot incidence, with disease symptoms in only 15% of treated pear saplings, compared with 82% in untreated controls. Collectively, our findings highlight the potential of T. harzianum and T. atroviride as effective biocontrol agents against white root rot caused by R. necatrix, thereby providing sustainable and environmental-friendly disease management strategies in agricultural systems.
{"title":"Potential of Trichoderma species to control Rosellinia necatrix, the etiological agent of white root rot","authors":"Shailesh S. Sawant , Sarika R. Bhapkar , Euddeum Choi , Byulhana Lee , Janghoon Song , Young Sik Jo , YoSup Park , Ho-Jin Seo","doi":"10.1016/j.biocontrol.2024.105664","DOIUrl":"10.1016/j.biocontrol.2024.105664","url":null,"abstract":"<div><div>White root rot, caused by the fungal pathogen <em>Dematophora necatrix</em> (syn. <em>Rosellinia necatrix</em>), poses a threat to crops worldwide, leading to substantial economic losses. Biological control using antagonistic fungi, such as <em>Trichoderma</em> spp., has emerged as a promising alternative to chemical fungicides in fungal disease management. In this study, we investigated the potential of three <em>Trichoderma</em> species, <em>Trichoderma harzianum</em> strain 40788 from the Korean Agriculture Culture Collection (KACC), <em>T. atroviride</em> (KACC 43393), and <em>T. asperellum</em> (KACC 43821), as biocontrol agents against four <em>R. necatrix</em> strains (KACC 40446, 40445, 40447, and 40168). Dual-culture assays revealed that <em>T. harzianum</em> (KACC 40788) and <em>T. atroviride</em> (KACC 43393) rapidly inhibited mycelial growth, achieving up to 80% suppression of strains KACC 40445 and KACC 40446, whereas <em>T. asperellum</em> (KACC 43821) exhibited lower inhibition. In volatile antibiotic production assays, volatile metabolites produced by <em>T. harzianum</em> (KACC 40788) and <em>T. atroviride</em> (KACC 43393) inhibited mycelial growth of <em>R. necatrix</em> strains KACC 40445 and KACC 40446 by 76.52 and 74.70%, respectively. Microscopic analysis of mycoparasitism revealed that <em>Trichoderma</em> strains adhered to, coiled around, and lysed <em>R. necatrix</em> mycelia. Finally, greenhouse trials demonstrated that <em>T. harzianum</em> and <em>T. atroviride</em> treatment significantly reduced white root rot incidence, with disease symptoms in only 15% of treated pear saplings, compared with 82% in untreated controls. Collectively, our findings highlight the potential of <em>T. harzianum</em> and <em>T. atroviride</em> as effective biocontrol agents against white root rot caused by <em>R. necatrix</em>, thereby providing sustainable and environmental-friendly disease management strategies in agricultural systems.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"199 ","pages":"Article 105664"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.biocontrol.2024.105663
Maria Athanasiadou, Madita Schulz, Rainer Meyhöfer
Recent studies demonstrated that blue and UV light effectively disturb greenhouse whiteflies (Trialeurodes vaporariorum) from a host plant (“push”), enhancing their capture on attractive traps after dispersal (“pull”). This push–pull technique could contribute to whitefly biocontrol and lead to the development of mass trapping. However, the impact of these wavelengths on the behavior of whitefly natural enemies, commonly deployed for biocontrol, remains underexplored. This study investigated the response of two important whitefly biocontrol agents, Macrolophus pygmaeus and Encarsia formosa, to blue and UV light. Initial experiments were conducted under artificial conditions (no prey/host and plant present) to isolate their visual behavior to these lights, excluding other stimuli. In follow up experiments, the effect of these lights was assessed in a more complex scenario, involving prey/host (whitefly nymphs) on tomato leaves. Results revealed that both M. pygmaeus and E. formosa exhibited avoidance behavior under blue and UV LEDs in the artificial setup, irrespective of ambient light or dark conditions. Contrastingly, in presence of prey/host on tomato leaves, only M. pygmaeus was significantly disturbed by UV light, whereas in all other scenarios there was little to no effect of blue and UV LEDs on the behavior of these natural enemies.. These findings enhance our understanding on the visual behavior of crucial biocontrol agents and highlight the importance of refining targeted whitefly control techniques that minimize impacts on beneficial insects and optimize the use of LEDs in integrated pest management (IPM).
{"title":"The effect of blue and UV light-emitted diodes (LEDs) on the disturbance of the whitefly natural enemies Macrolophus pygmaeus and Encarsia formosa","authors":"Maria Athanasiadou, Madita Schulz, Rainer Meyhöfer","doi":"10.1016/j.biocontrol.2024.105663","DOIUrl":"10.1016/j.biocontrol.2024.105663","url":null,"abstract":"<div><div>Recent studies demonstrated that blue and UV light effectively disturb greenhouse whiteflies (<em>Trialeurodes vaporariorum</em>) from a host plant (“push”), enhancing their capture on attractive traps after dispersal (“pull”). This push–pull technique could contribute to whitefly biocontrol and lead to the development of mass trapping. However, the impact of these wavelengths on the behavior of whitefly natural enemies, commonly deployed for biocontrol, remains underexplored. This study investigated the response of two important whitefly biocontrol agents, <em>Macrolophus pygmaeus</em> and <em>Encarsia formosa,</em> to blue and UV light. Initial experiments were conducted under artificial conditions (no prey/host and plant present) to isolate their visual behavior to these lights, excluding other stimuli. In follow up experiments, the effect of these lights was assessed in a more complex scenario, involving prey/host (whitefly nymphs) on tomato leaves. Results revealed that both <em>M. pygmaeus</em> and <em>E. formosa</em> exhibited avoidance behavior under blue and UV LEDs in the artificial setup, irrespective of ambient light or dark conditions. Contrastingly, in presence of prey/host on tomato leaves, only <em>M. pygmaeus</em> was significantly disturbed by UV light, whereas in all other scenarios there was little to no effect of blue and UV LEDs on the behavior of these natural enemies.. These findings enhance our understanding on the visual behavior of crucial biocontrol agents and highlight the importance of refining targeted whitefly control techniques that minimize impacts on beneficial insects and optimize the use of LEDs in integrated pest management (IPM).</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"199 ","pages":"Article 105663"},"PeriodicalIF":3.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142744642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-20DOI: 10.1016/j.biocontrol.2024.105662
Jinge Yuan , Jun Xu , Wenting Zhang , Qiao Liu , Ling Luo , Huai Liu , Yaying Li
The nutritional content of prey plays a pivotal role in shaping the predatory behavior and effectiveness of natural pest control agents like Eocanthecona furcellata. We assessed the biological performance and life history of E. furcellata on three diets, larvae of Spodoptera frugiperda, larvae of Tenebrio molitor, and an artificial diet. We also analyzed their nutritional content and quantified consumption and nutritional intake by E. furcellata. The three diets differed substantially in water, protein, and fat content. The moisture content of T. molitor larvae was significantly lower (35.0 ± 0.3 %) than that of S. frugiperda larvae (61.0 ± 0.6 %) or the artificial diet (88.7 ± 0.1 %). Female E. furcellata obtained 8.3 mg of protein per day feeding on S. frugiperda, significantly more than on T. molitor (2.4 mg) or the artificial diet (0.4 mg). 15-day fecundity ranged from 140.2 (±9.3) eggs on S. frugiperda, to 103.3 (±4.8) eggs on T. molitor, and 75.1 (±7.1) eggs on the diet. Our study provides insights into the nutritional ecology of E. furcellata and ways to improve the breeding of this beneficial species for augmentation in agricultural applications.
猎物的营养成分在影响天然害虫控制剂（如毛鳞虫）的捕食行为和效果方面起着关键作用。我们评估了毛鳞虫在三种食物（鞘翅目蚜虫幼虫、天牛幼虫和人工食物）上的生物学表现和生活史。我们还分析了它们的营养成分，并量化了毛鳞鱼的消耗量和营养摄入量。三种食物的水分、蛋白质和脂肪含量差别很大。T.molitor幼虫的水分含量（35.0 ± 0.3 %）明显低于S. frugiperda幼虫（61.0 ± 0.6 %）或人工饲料（88.7 ± 0.1 %）。雌性 E. furcellata 每天摄食 S. frugiperda 可获得 8.3 毫克蛋白质，明显高于 T. molitor（2.4 毫克）或人工饲料（0.4 毫克）。15 天的受精率范围为：摄食 S. frugiperda 的 140.2 (±9.3) 枚卵，摄食 T. molitor 的 103.3 (±4.8) 枚卵，以及摄食人工饲料的 75.1 (±7.1) 枚卵。我们的研究有助于深入了解毛鳞菊的营养生态学，以及如何改进这一有益物种的繁殖，以提高其在农业中的应用。
{"title":"Nutritional ecology of a predatory stink bug: A comparative analysis of nutrient acquisition from two prey species and an artificial diet","authors":"Jinge Yuan , Jun Xu , Wenting Zhang , Qiao Liu , Ling Luo , Huai Liu , Yaying Li","doi":"10.1016/j.biocontrol.2024.105662","DOIUrl":"10.1016/j.biocontrol.2024.105662","url":null,"abstract":"<div><div>The nutritional content of prey plays a pivotal role in shaping the predatory behavior and effectiveness of natural pest control agents like <em>Eocanthecona furcellata</em>. We assessed the biological performance and life history of <em>E. furcellata</em> on three diets, larvae of <em>Spodoptera frugiperda</em>, larvae of <em>Tenebrio molitor</em>, and an artificial diet. We also analyzed their nutritional content and quantified consumption and nutritional intake by <em>E. furcellata</em>. The three diets differed substantially in water, protein, and fat content. The moisture content of <em>T. molitor</em> larvae was significantly lower (35.0 ± 0.3 %) than that of <em>S. frugiperda</em> larvae (61.0 ± 0.6 %) or the artificial diet (88.7 ± 0.1 %). Female <em>E. furcellata</em> obtained 8.3 mg of protein per day feeding on <em>S. frugiperda</em>, significantly more than on <em>T. molitor</em> (2.4 mg) or the artificial diet (0.4 mg). 15-day fecundity ranged from 140.2 (±9.3) eggs on <em>S. frugiperda</em>, to 103.3 (±4.8) eggs on <em>T. molitor</em>, and 75.1 (±7.1) eggs on the diet. Our study provides insights into the nutritional ecology of <em>E. furcellata</em> and ways to improve the breeding of this beneficial species for augmentation in agricultural applications.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"199 ","pages":"Article 105662"},"PeriodicalIF":3.7,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-20DOI: 10.1016/j.biocontrol.2024.105657
Taiadjana M. Fortuna, Loïc Colin-Duchevet, Yanna Desreumaux, Rémi Jeannette, Manuel Le Gonnidec, Bruno Le Ru, Romane Mettauer, Florence Mougel, Laure Kaiser
Biocontrol of exotic insect pests can be achieved by introducing natural enemies from the native range. This method has been successful in controlling many pests worldwide, but negative effects on local non-targets have sometimes occurred. Before the introduction of exotic macro-organisms useful for crop protection, a risk assessment is mandatory under EU regulations. In this study, we assessed the non-target risks of the larval parasitoid Cotesia typhae (Hymenoptera, Braconidae), a potential agent for inundative biocontrol of the Mediterranean corn borer Sesamia nonagrioides (Lepidoptera, Noctuidae), both natives to Sub-Saharan Africa. The effects of C. typhae on 8 non-target species was determined by sequential analysis under laboratory conditions, including tests of acceptance, development monitoring, olfactory attractiveness and in planta parasitism test. The results varied considerably between species. By multiplying the probability of outcome of the successive steps of the parasitism process, we estimated that non-target species had lower average risks of C. typhae development (1 % of non-target larvae at risk) and of induced mortality (5 %) compared to S. nonagrioides larvae (41 and 42 % respectively). The highest mortality risk in planta was observed for the cattail stemborer, Nonagria typhae (9 %), although it was still lower than for the target species (33 %). These host range results and the low survival capacity of the parasitoid at winter temperatures, suggest a low long-term environmental risk, which is supported by the estimation of the global risk index proposed by van Lenteren et al. (2003). The host range and impact of C. typhae in field conditions will soon be determined.
{"title":"Non-target risk assessment of Cotesia typhae, a potential biological control agent of the Mediterranean corn borer","authors":"Taiadjana M. Fortuna, Loïc Colin-Duchevet, Yanna Desreumaux, Rémi Jeannette, Manuel Le Gonnidec, Bruno Le Ru, Romane Mettauer, Florence Mougel, Laure Kaiser","doi":"10.1016/j.biocontrol.2024.105657","DOIUrl":"10.1016/j.biocontrol.2024.105657","url":null,"abstract":"<div><div>Biocontrol of exotic insect pests can be achieved by introducing natural enemies from the native range. This method has been successful in controlling many pests worldwide, but negative effects on local non-targets have sometimes occurred. Before the introduction of exotic macro-organisms useful for crop protection, a risk assessment is mandatory under EU regulations. In this study, we assessed the non-target risks of the larval parasitoid <em>Cotesia typhae</em> (Hymenoptera, Braconidae), a potential agent for inundative biocontrol of the Mediterranean corn borer <em>Sesamia nonagrioides</em> (Lepidoptera, Noctuidae), both natives to Sub-Saharan Africa. The effects of <em>C. typhae</em> on 8 non-target species was determined by sequential analysis under laboratory conditions, including tests of acceptance, development monitoring, olfactory attractiveness and <em>in planta</em> parasitism test. The results varied considerably between species. By multiplying the probability of outcome of the successive steps of the parasitism process, we estimated that non-target species had lower average risks of <em>C. typhae</em> development (1 % of non-target larvae at risk) and of induced mortality (5 %) compared to <em>S. nonagrioides</em> larvae (41 and 42 % respectively). The highest mortality risk <em>in planta</em> was observed for the cattail stemborer, <em>Nonagria typhae</em> (9 %), although it was still lower than for the target species (33 %). These host range results and the low survival capacity of the parasitoid at winter temperatures, suggest a low long-term environmental risk, which is supported by the estimation of the global risk index proposed by <span><span>van Lenteren et al. (2003)</span></span>. The host range and impact of <em>C. typhae</em> in field conditions will soon be determined.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"199 ","pages":"Article 105657"},"PeriodicalIF":3.7,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-17DOI: 10.1016/j.biocontrol.2024.105660
Yue Yuan , Shijia Zhang , Xiaoshan Tan , Jili Deng , Shengjie Gong , Xueling Zhai , Xiangru Xu , Changchun Ruan , Ying Hu , Junjie Zhang , Zhao Peng
Maize stalk rot, caused by Fusarium spp., is a significant disease that adversely impacts the yield and quality of corn. Biological control plays a crucial role in managing numerous crop diseases, including maize stalk rot. Biocontrol agents are predominantly derived from soil and plant tissues, with limited reports on isolating highly efficient biocontrol agents from insects. In this study, 144 bacterial strains were isolated from the intestinal tract of third instar larvae of Allomyrina dichotoma. Through dual culture tests, twelve strains exhibiting strong antagonism against two maize stalk rot pathogens, F. graminearum and F. verticillioides, were identified. Among them, the M54 strain exhibited the most potent antagonistic effect against the two pathogenic fungi and was identified as Bacillus siamensis through 16S rRNA gene sequence analysis. The complete genome for M54 was assembled using PacBio single-molecule real-time (SMRT) and Illumina sequencing technologies. Whole genome phylogenetic analysis further confirmed M54 was B. siamensis. Microscopic examination revealed that M54 had the ability to inhibit the fungal spore germination and hyphal formation. Furthermore, M54 exhibited effective colonization in the maize rhizosphere and enhanced maize growth. It showed that treatment with M54 significantly suppressed lesion expansion induced by F. graminearum on maize stalks in the seedling and adult plant assays. Genomic analysis using antiSMASH revealed 11 gene clusters for secondary metabolite synthesis. This study provides a novel approach for isolating biocontrol agents to manage plant diseases and highlights B. siamensis M54 as a potential efficient biocontrol agent for maize stalk rot.
{"title":"Intestinal bacterium Bacillus siamensis M54 from Allomyrina dichotoma is a potential biocontrol agent against maize stalk rot","authors":"Yue Yuan , Shijia Zhang , Xiaoshan Tan , Jili Deng , Shengjie Gong , Xueling Zhai , Xiangru Xu , Changchun Ruan , Ying Hu , Junjie Zhang , Zhao Peng","doi":"10.1016/j.biocontrol.2024.105660","DOIUrl":"10.1016/j.biocontrol.2024.105660","url":null,"abstract":"<div><div>Maize stalk rot, caused by <em>Fusarium</em> spp., is a significant disease that adversely impacts the yield and quality of corn. Biological control plays a crucial role in managing numerous crop diseases, including maize stalk rot. Biocontrol agents are predominantly derived from soil and plant tissues, with limited reports on isolating highly efficient biocontrol agents from insects. In this study, 144 bacterial strains were isolated from the intestinal tract of third instar larvae of <em>Allomyrina dichotoma</em>. Through dual culture tests, twelve strains exhibiting strong antagonism against two maize stalk rot pathogens, <em>F. graminearum</em> and <em>F. verticillioides</em>, were identified. Among them, the M54 strain exhibited the most potent antagonistic effect against the two pathogenic fungi and was identified as <em>Bacillus siamensis</em> through 16S rRNA gene sequence analysis. The complete genome for M54 was assembled using PacBio single-molecule real-time (SMRT) and Illumina sequencing technologies. Whole genome phylogenetic analysis further confirmed M54 was <em>B. siamensis</em>. Microscopic examination revealed that M54 had the ability to inhibit the fungal spore germination and hyphal formation. Furthermore, M54 exhibited effective colonization in the maize rhizosphere and enhanced maize growth. It showed that treatment with M54 significantly suppressed lesion expansion induced by <em>F. graminearum</em> on maize stalks in the seedling and adult plant assays. Genomic analysis using antiSMASH revealed 11 gene clusters for secondary metabolite synthesis. This study provides a novel approach for isolating biocontrol agents to manage plant diseases and highlights <em>B. siamensis</em> M54 as a potential efficient biocontrol agent for maize stalk rot.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"199 ","pages":"Article 105660"},"PeriodicalIF":3.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-14DOI: 10.1016/j.biocontrol.2024.105654
Ana Elizabeth Díaz Montilla, Takumasa Kondo
Naranjilla also known as lulo, Solanum quitoense Lam., and tree tomato, Solanum betaceum Cav. (Solanaceae), are two tropical fruit trees sought after in national and international markets for their exquisite flavor. The Andean region of Colombia, Ecuador, and Peru is the center of origin of S. quitoense, while S. betaceum is native to Bolivia and Argentina. Both crops are affected by the fruit borer Neoleucinodes elegantalis (Guenée) (Lepidoptera: Crambidae), an oligophagous insect whose larvae develop inside the fruit, and feeds on the mesocarp and endosperm. Damage caused by N. elegantalis impacts the economy of producers who are generally small-scale farmers in Latin America, who use insecticides indiscriminately for pest control. Being a quarantine pest for the United States, Chile, and Europe, N. elegantalis is the main phytosanitary barrier that these fruit trees have for international marketing. The greatest reproductive success of this moth and the greatest diversity of its natural enemies may be associated with S. quitoense, which might be the ancestral host for N. elegantalis. The present work reports on the importance of monitoring in the pest management of N. elegantalis using pheromone traps and highlights the high potential that natural enemies of N. elegantalis have in biological control programs. Several strategies for conserving and boosting natural enemy populations in S. quitoense and S. betaceum crops in Colombia and Ecuador are discussed, including the use of low-toxicity chemicals, selective weed control, and monitoring N. elegantalis populations with sex pheromones. This comprehensive review addresses the current gaps in knowledge regarding solanaceous crops and their primary lepidopteran pest in the Andean region.
Naranjilla 又名 lulo，Solanum quitoense Lam.和树番茄 Solanum betaceum Cav.（茄科）是两种热带果树，因其味道鲜美而在国内和国际市场上备受追捧。哥伦比亚、厄瓜多尔和秘鲁的安第斯地区是 S. quitoense 的原产地，而 S. betaceum 则原产于玻利维亚和阿根廷。这两种作物都会受到果实蛀虫 Neoleucinodes elegantalis (Guenée) （鳞翅目：栉孔虫科）的影响，这是一种寡食性昆虫，其幼虫在果实内发育，以中果皮和胚乳为食。N. elegantalis 造成的损害影响了生产者的经济，这些生产者通常是拉丁美洲的小农，他们滥用杀虫剂来控制害虫。作为美国、智利和欧洲的检疫害虫，N. elegantalis 是这些果树在国际市场上销售的主要植物检疫障碍。这种蛾的最大繁殖成功率及其天敌的最大多样性可能与 S. quitoense 有关，而 S. quitoense 可能是 N. elegantalis 的祖先寄主。本研究报告指出了利用信息素诱捕器监测雅纹夜蛾虫害管理的重要性，并强调了雅纹夜蛾天敌在生物防治计划中的巨大潜力。文中讨论了在哥伦比亚和厄瓜多尔的 S. quitoense 和 S. betaceum 作物中保护和提高天敌种群数量的几种策略，包括使用低毒化学品、选择性杂草控制以及使用性信息素监测 N. elegantalis 种群数量。这篇全面的综述探讨了安第斯地区茄科作物及其主要鳞翅目害虫方面目前存在的知识空白。
{"title":"Biological control of Neoleucinodes elegantalis (Guenée) (Lepidoptera: Crambidae): A comprehensive review of IPM strategies for Andean solanaceous crops","authors":"Ana Elizabeth Díaz Montilla, Takumasa Kondo","doi":"10.1016/j.biocontrol.2024.105654","DOIUrl":"10.1016/j.biocontrol.2024.105654","url":null,"abstract":"<div><div>Naranjilla also known as lulo, <em>Solanum quitoense</em> Lam., and tree tomato, <em>Solanum betaceum</em> Cav. (Solanaceae), are two tropical fruit trees sought after in national and international markets for their exquisite flavor. The Andean region of Colombia, Ecuador, and Peru is the center of origin of <em>S. quitoense</em>, while <em>S. betaceum</em> is native to Bolivia and Argentina. Both crops are affected by the fruit borer <em>Neoleucinodes elegantalis</em> (Guenée) (Lepidoptera: Crambidae), an oligophagous insect whose larvae develop inside the fruit, and feeds on the mesocarp and endosperm. Damage caused by <em>N. elegantalis</em> impacts the economy of producers who are generally small-scale farmers in Latin America, who use insecticides indiscriminately for pest control. Being a quarantine pest for the United States, Chile, and Europe, <em>N. elegantalis</em> is the main phytosanitary barrier that these fruit trees have for international marketing. The greatest reproductive success of this moth and the greatest diversity of its natural enemies may be associated with <em>S. quitoense</em>, which might be the ancestral host for <em>N. elegantalis</em>. The present work reports on the importance of monitoring in the pest management of <em>N. elegantalis</em> using pheromone traps and highlights the high potential that natural enemies of <em>N. elegantalis</em> have in biological control programs. Several strategies for conserving and boosting natural enemy populations in <em>S. quitoense</em> and <em>S. betaceum</em> crops in Colombia and Ecuador are discussed, including the use of low-toxicity chemicals, selective weed control, and monitoring <em>N. elegantalis</em> populations with sex pheromones. This comprehensive review addresses the current gaps in knowledge regarding solanaceous crops and their primary lepidopteran pest in the Andean region.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"199 ","pages":"Article 105654"},"PeriodicalIF":3.7,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-14DOI: 10.1016/j.biocontrol.2024.105658
T.D. Morris , J.R. Gould , T.C. Booth , F.D. Miller , J. Kaltenbach , M.K. Fierke
Ash trees (Fraxinus spp.) were commonly planted street trees in urban environments prior to the arrival of emerald ash borer (EAB), Agrilus planipennis Fairmaire, in the 1990 s and its subsequent impacts. Insecticide treatments can provide consistent control of EAB and are used to protect high-value trees; however, control only lasts a few years before reapplication is needed. An EAB biological control program seeks to provide long-term control and several parasitoids have been released to that end, including the larval parasitoids Tetrastichus planipennisi Yang (Eulophidae) and Spathius galinae Belokobylskij (Braconidae). In 2015, we released parasitoids in three cities (Syracuse NY, Naperville IL, Boulder CO) while city arborists were simultaneously treating high-value street trees with insecticides. We hypothesized parasitoids would be able to establish on EAB in untreated trees and spread throughout the cities while treated trees remained healthy. We also hypothesized EAB densities would fall as non-treated ash died and would not subsequently rebound as insecticide treatments were removed from street trees due to the parasitism of biocontrol agents. Three-hundred trees were selected for monitoring in each city: 100 untreated, 100 treated, and 100 temporarily treated. Tetrastichus planipennisi successfully established in all three cities, while S. galinae established in Syracuse and Boulder. Untreated trees rapidly declined as expected while treated trees remained healthy. During the study subsets of trees were removed from the treatment cycle as EAB densities fell (≤ 10 larvae/m2). Minor canopy decline was present in 2021–2023 in trees from which treatment was removed, with median crown classes declining from 1 to 2. Despite this shift, most of these trees remained un-infested (∼ 75 %) and retained healthy canopies. Trees that did become infested had high apparent parasitism and low EAB densities. Due to the high value of urban trees, we recommend managers continue monitoring trees and consider selectively reinstating insecticide treatments on trees that start to decline and/or are subject to additional urban stressors.
{"title":"Managing emerald ash borer in urban forests: Integrating biocontrol and insecticide treatments","authors":"T.D. Morris , J.R. Gould , T.C. Booth , F.D. Miller , J. Kaltenbach , M.K. Fierke","doi":"10.1016/j.biocontrol.2024.105658","DOIUrl":"10.1016/j.biocontrol.2024.105658","url":null,"abstract":"<div><div>Ash trees (<em>Fraxinus</em> spp.) were commonly planted street trees in urban environments prior to the arrival of emerald ash borer (EAB), <em>Agrilus planipennis</em> Fairmaire, in the 1990 s and its subsequent impacts. Insecticide treatments can provide consistent control of EAB and are used to protect high-value trees; however, control only lasts a few years before reapplication is needed. An EAB biological control program seeks to provide long-term control and several parasitoids have been released to that end, including the larval parasitoids <em>Tetrastichus planipennisi</em> Yang (Eulophidae) and <em>Spathius galinae</em> Belokobylskij (Braconidae). In 2015, we released parasitoids in three cities (Syracuse NY, Naperville IL, Boulder CO) while city arborists were simultaneously treating high-value street trees with insecticides. We hypothesized parasitoids would be able to establish on EAB in untreated trees and spread throughout the cities while treated trees remained healthy. We also hypothesized EAB densities would fall as non-treated ash died and would not subsequently rebound as insecticide treatments were removed from street trees due to the parasitism of biocontrol agents. Three-hundred trees were selected for monitoring in each city: 100 untreated, 100 treated, and 100 temporarily treated. <em>Tetrastichus planipennisi</em> successfully established in all three cities, while <em>S. galinae</em> established in Syracuse and Boulder. Untreated trees rapidly declined as expected while treated trees remained healthy. During the study subsets of trees were removed from the treatment cycle as EAB densities fell (≤ 10 larvae/m<sup>2</sup>). Minor canopy decline was present in 2021–2023 in trees from which treatment was removed, with median crown classes declining from 1 to 2. Despite this shift, most of these trees remained un-infested (∼ 75 %) and retained healthy canopies. Trees that did become infested had high apparent parasitism and low EAB densities. Due to the high value of urban trees, we recommend managers continue monitoring trees and consider selectively reinstating insecticide treatments on trees that start to decline and/or are subject to additional urban stressors.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"199 ","pages":"Article 105658"},"PeriodicalIF":3.7,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-13DOI: 10.1016/j.biocontrol.2024.105659
Kelley Leung
Parasitoid wasps are haplodiploid insects, but polyploidy (diploid males, triploid females) occurs for many species. In biological control, polyploidy may have beneficial effects on desirable biological related traits. However, this is only possible in species for which polyploidy does not impair essential biological functions, as in for instance species with Complementary Sex Determination (CSD), where inbreeding drives sterile diploid male production and extinction risk. Notably, while CSD polyploidy is better studied, most biological agents are non-CSD species. This includes model Nasonia vitripennis, a blowfly parasitoid that can be purposefully made polyploid and then produces a high number of reproductive polyploid individuals. To test baseline non-CSD polyploid utility, an outbred polyploid N. vitripennis transformer knockdown line (tKDL) was established and assayed for relevant traits for considering polyploids as biological agents. Male diploidy and female triploidy increased head width, a body size proxy. Polyploidy increased unmated lifespan in diploid males, but decreased it in triploid females. In first matings, haploid and diploid males had equal fecundity, but sperm depletion assays revealed reduced diploid male fitness overall. Triploid females had a reduction in parasitization ability. This reduced male fecundity and female parasitization in tKDL suggest that polyploid Nasonia parasitoids have limited direct use in biological control, particularly in this outbred background. They are possibly more suitable for preparative applications, such as retaining alleles with sex-specific benefits.
{"title":"Potential benefits of male diploidy and female triploidy for parasitoid wasps used as biological control agents: A case study in Nasonia","authors":"Kelley Leung","doi":"10.1016/j.biocontrol.2024.105659","DOIUrl":"10.1016/j.biocontrol.2024.105659","url":null,"abstract":"<div><div>Parasitoid wasps are haplodiploid insects, but polyploidy (diploid males, triploid females) occurs for many species. In biological control, polyploidy may have beneficial effects on desirable biological related traits. However, this is only possible in species for which polyploidy does not impair essential biological functions, as in for instance species with Complementary Sex Determination (CSD), where inbreeding drives sterile diploid male production and extinction risk. Notably, while CSD polyploidy is better studied, most biological agents are non-CSD species. This includes model <em>Nasonia vitripennis</em>, a blowfly parasitoid that can be purposefully made polyploid and then produces a high number of reproductive polyploid individuals. To test baseline non-CSD polyploid utility, an outbred polyploid <em>N. vitripennis transformer</em> knockdown line (tKDL) was established and assayed for relevant traits for considering polyploids as biological agents. Male diploidy and female triploidy increased head width, a body size proxy. Polyploidy increased unmated lifespan in diploid males, but decreased it in triploid females. In first matings, haploid and diploid males had equal fecundity, but sperm depletion assays revealed reduced diploid male fitness overall. Triploid females had a reduction in parasitization ability. This reduced male fecundity and female parasitization in tKDL suggest that polyploid <em>Nasonia</em> parasitoids have limited direct use in biological control, particularly in this outbred background. They are possibly more suitable for preparative applications, such as retaining alleles with sex-specific benefits.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"199 ","pages":"Article 105659"},"PeriodicalIF":3.7,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-08DOI: 10.1016/j.biocontrol.2024.105650
Logan Herbert , Annick Zanga , David Kinsler , Victoria Ayala , Aristide Takoukam Kamla , Rodrigo Diaz
Salvinia, Salvinia molesta Mitchell (Salviniaceae) is a free-floating aquatic fern native to Brazil and considered one of the worst weeds in the world. When left unchecked, salvinia forms dense mats on the water surface, limiting sunlight penetration and altering water quality that disrupt ecosystem processes. In 2016, salvinia was first reported in Lake Ossa, Cameroon, and by summer 2021, had expanded to cover almost 49 % of the lake’s 4,000-hectare surface. A multinational team initiated a biological control and monitoring program, importing the salvinia weevil, Cyrtobagous salviniae Calder & Sands (Coleoptera: Curculionidae) from Louisiana, USA, in summer 2021. The objectives of this study were to: quantify the changes in salvinia cover and other floating vegetation, document the establishment and impact of the biological control program, and deliver a tool for near-real time monitoring of floating vegetation. We developed a satellite-based remote sensing application to document in near real-time the changes in coverage of floating vegetation. Using this tool, we quantified the reduction in the salvinia coverage by 80 % within three years of the release of the weevil. Field surveys in 2022 and 2023, demonstrated weevil establishment in the lake and widespread salvinia browning that was associated with weevil damage. Linear regressions of the percent cover of floating vegetation over time, demonstrated that after the weevil release, the rate of change decreased to −1.7 % per 60 days. Field monitoring and satellite imagery showed the establishment of a sedge (Oxycaryum sp., Cyperaceae) within the salvinia mat in late 2021. This secondary invasion slowed the reduction in coverage of floating vegetation from −1.7 % to −0.6 % per 60 days, and warrants further research. By late 2023, the revitalization of Lake Ossa restored fishing and transportation opportunities for the community, and also the comeback the emblematic African manatee. The success of the biological control of salvinia in Lake Ossa is not surprising due to its tropical conditions. However, it highlights the importance of early intervention and continuous monitoring. We propose that the integration of biological control and remote sensing technology is becoming more accessible and can be automated; therefore, a replicable model for future invasive weed programs around the world.
{"title":"Optimizing aquatic weed management in Lake Ossa, Cameroon: Harnessing the power of biological control and real-time satellite monitoring","authors":"Logan Herbert , Annick Zanga , David Kinsler , Victoria Ayala , Aristide Takoukam Kamla , Rodrigo Diaz","doi":"10.1016/j.biocontrol.2024.105650","DOIUrl":"10.1016/j.biocontrol.2024.105650","url":null,"abstract":"<div><div>Salvinia, <em>Salvinia molesta</em> Mitchell (Salviniaceae) is a free-floating aquatic fern native to Brazil and considered one of the worst weeds in the world. When left unchecked, salvinia forms dense mats on the water surface, limiting sunlight penetration and altering water quality that disrupt ecosystem processes. In 2016, salvinia was first reported in Lake Ossa, Cameroon, and by summer 2021, had expanded to cover almost 49 % of the lake’s 4,000-hectare surface. A multinational team initiated a biological control and monitoring program, importing the salvinia weevil, <em>Cyrtobagous salviniae</em> Calder & Sands (Coleoptera: Curculionidae) from Louisiana, USA, in summer 2021. The objectives of this study were to: quantify the changes in salvinia cover and other floating vegetation, document the establishment and impact of the biological control program, and deliver a tool for near-real time monitoring of floating vegetation. We developed a satellite-based remote sensing application to document in near real-time the changes in coverage of floating vegetation. Using this tool, we quantified the reduction in the salvinia coverage by 80 % within three years of the release of the weevil. Field surveys in 2022 and 2023, demonstrated weevil establishment in the lake and widespread salvinia browning that was associated with weevil damage. Linear regressions of the percent cover of floating vegetation over time, demonstrated that after the weevil release, the rate of change decreased to −1.7 % per 60 days. Field monitoring and satellite imagery showed the establishment of a sedge (<em>Oxycaryum</em> sp., Cyperaceae) within the salvinia mat in late 2021. This secondary invasion slowed the reduction in coverage of floating vegetation from −1.7 % to −0.6 % per 60 days, and warrants further research. By late 2023, the revitalization of Lake Ossa restored fishing and transportation opportunities for the community, and also the comeback the emblematic African manatee. The success of the biological control of salvinia in Lake Ossa is not surprising due to its tropical conditions. However, it highlights the importance of early intervention and continuous monitoring. We propose that the integration of biological control and remote sensing technology is becoming more accessible and can be automated; therefore, a replicable model for future invasive weed programs around the world.</div></div>","PeriodicalId":8880,"journal":{"name":"Biological Control","volume":"199 ","pages":"Article 105650"},"PeriodicalIF":3.7,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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