Pub Date : 2022-10-19DOI: 10.12741/ebrasilis.v15.e1007
Ali Al-Jahdhami, A. Al-Raeesi, Said Al-Rashdi
The present communication deals with a faunistic study on two species of Latrodectus Walckenaer with medically important issues from Oman. Several specimens of Latrodectus have been collected at various localities in Sultanate of Oman. This study records two species of Latrodectus from Oman, of which Latrodectus cinctus Blackwall only from northern Oman and Latrodectus geometricus C.L. Koch from both northern and southern Oman.
{"title":"First Records of Black Widow Spider Latrodectus Walckenaer (Araneae: Theridiidae) in Oman","authors":"Ali Al-Jahdhami, A. Al-Raeesi, Said Al-Rashdi","doi":"10.12741/ebrasilis.v15.e1007","DOIUrl":"https://doi.org/10.12741/ebrasilis.v15.e1007","url":null,"abstract":"The present communication deals with a faunistic study on two species of Latrodectus Walckenaer with medically important issues from Oman. Several specimens of Latrodectus have been collected at various localities in Sultanate of Oman. This study records two species of Latrodectus from Oman, of which Latrodectus cinctus Blackwall only from northern Oman and Latrodectus geometricus C.L. Koch from both northern and southern Oman.","PeriodicalId":11746,"journal":{"name":"EntomoBrasilis","volume":"09 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86508876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-17DOI: 10.12741/ebrasilis.v15.e999
Pedro Felipe Fróio Torres, Heloísa da Silva Baldinotti, Diogo Andrade da Costa, Ceres Maciel de Miranda, A. F. Cardoso
Aedes aegypti Linnaeus mosquito is a vector of several viruses that cause diseases of medical and veterinary importance. Dengue, yellow fever, Zika and Chikungunya viruses are more important arboviruses transmit by mosquitoes. A. aegypti life cycle goes through 4 stages of development and the time for development from egg to adult mosquito depends on a series of biotic and abiotic factors such as temperature, food availability and population density, studied in different species of insects. In this work we studied the effects of different food concentrations, temperatures variation, pH gradient and luminosity on the development of A. aegypti larvae. The eggs were collected in the city of Tangará da Serra/MT and larvae in the L1 stage were used for the tests. The results showed that all the factors studied interfered in the larval development. The increase in food concentration and temperature accelerated the development of larvae to pupae. The acidic pH (pH = 4) proved to be unsuitable for the development of larvae (100% lethality), with the ideal pH for the development of larval stages being equal to pH = 6. Although in all light variations (dark, light and photoperiod 10L/ 14D) there was complete development of the larvae, the photoperiod test proved to be more adequate. This study helps to better understand the success, dispersion and adaptation of the A. aegypti mosquito in different regions under different environmental conditions.
{"title":"Influence of pH, light, food concentration and temperature in Aedes aegypti Linnaeus (Diptera: Culicidae) larval development","authors":"Pedro Felipe Fróio Torres, Heloísa da Silva Baldinotti, Diogo Andrade da Costa, Ceres Maciel de Miranda, A. F. Cardoso","doi":"10.12741/ebrasilis.v15.e999","DOIUrl":"https://doi.org/10.12741/ebrasilis.v15.e999","url":null,"abstract":"Aedes aegypti Linnaeus mosquito is a vector of several viruses that cause diseases of medical and veterinary importance. Dengue, yellow fever, Zika and Chikungunya viruses are more important arboviruses transmit by mosquitoes. A. aegypti life cycle goes through 4 stages of development and the time for development from egg to adult mosquito depends on a series of biotic and abiotic factors such as temperature, food availability and population density, studied in different species of insects. In this work we studied the effects of different food concentrations, temperatures variation, pH gradient and luminosity on the development of A. aegypti larvae. The eggs were collected in the city of Tangará da Serra/MT and larvae in the L1 stage were used for the tests. The results showed that all the factors studied interfered in the larval development. The increase in food concentration and temperature accelerated the development of larvae to pupae. The acidic pH (pH = 4) proved to be unsuitable for the development of larvae (100% lethality), with the ideal pH for the development of larval stages being equal to pH = 6. Although in all light variations (dark, light and photoperiod 10L/ 14D) there was complete development of the larvae, the photoperiod test proved to be more adequate. This study helps to better understand the success, dispersion and adaptation of the A. aegypti mosquito in different regions under different environmental conditions.","PeriodicalId":11746,"journal":{"name":"EntomoBrasilis","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88145572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-27DOI: 10.12741/ebrasilis.v15.e1004
M. Q. Almeida, J. W. Morais
A new species of Paratropis is herein described and illustrated, namely: Paratropis minusculus n. sp. based on males, females and immatures from Potaro-Siparuni, Guyana. Male e female of P. minusculus differ from those of all other species of the genus by having six eyes and by spinneret apical segment domed. In addition, we presented the first record of paratropidid species from Guyana, contribute to the knowledge of local biodiversity.
本文根据圭亚那Potaro-Siparuni的雄性、雌性和未成熟种，描述和说明了一新种Paratropis minusculus n. sp.。雌雄小蜂的区别于所有其他种类的雌蜂，它们有六只眼睛，吐丝器的顶端部分呈圆顶状。此外，我们还首次记录了来自圭亚那的副蹼足动物物种，有助于了解当地的生物多样性。
{"title":"A new species of Paratropis Simon, 1889 (Araneae: Paratropididae) from Guyana","authors":"M. Q. Almeida, J. W. Morais","doi":"10.12741/ebrasilis.v15.e1004","DOIUrl":"https://doi.org/10.12741/ebrasilis.v15.e1004","url":null,"abstract":"A new species of Paratropis is herein described and illustrated, namely: Paratropis minusculus n. sp. based on males, females and immatures from Potaro-Siparuni, Guyana. Male e female of P. minusculus differ from those of all other species of the genus by having six eyes and by spinneret apical segment domed. In addition, we presented the first record of paratropidid species from Guyana, contribute to the knowledge of local biodiversity.","PeriodicalId":11746,"journal":{"name":"EntomoBrasilis","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84992870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-23DOI: 10.12741/ebrasilis.v15.e1003
N. G. Cipola, D. Pádua, K. Schoeninger, B. G. Oliveira, S. S. Gadelha, J. A. C. Zequi
We reported the hymenopteran fauna (except Formicidae) in a floodable area in the South Pantanal, Mato Grosso do Sul, Brazil. The study was conducted in a riparian forest of the Miranda river, located in the Passo do Lontra region, Corumbá. The collection occurred in the dry season of August 2016 using different capture methods. A total of 137 individuals distributed in 18 families, 43 genera, and 64 morphospecies (10 nominal) were collected. The families with the greatest richness were Diapriidae and Ichneumonidae with 11 morphospecies each (17% of the total), followed by Platygastridae and Braconidae with 10 and nine, respectively. Two species were newly recorded for Brazil: Gryonoides pulchellus Dodd, 1920 (Platygastridae) and Losada penai Fritz, 1873 (Crabronidae), plus 22 new records for Mato Grosso do Sul. This study increases about 5.2% of the wasp fauna recorded in Mato Grosso do Sul, as well as for the Pantanal.
我们报道了巴西南马托格罗索州南潘塔纳尔一个可洪泛区膜翅目动物群(除蚁科外)。这项研究是在位于科伦巴 Passo do Lontra地区的米兰达河的河岸森林中进行的。采集时间为2016年8月的旱季，采用不同的采集方法。共有137个个体，分属18科43属64种(名义种10种)。最丰富的科是双翅螨科和姬螨科，各有11种(占总数的17%)，其次是白腹螨科和绢螨科，分别有10种和9种。巴西新记录2种:Platygastridae (Gryonoides pulchellus Dodd, 1920)和Losada penai Fritz (Crabronidae, 1873)，南马托格罗索州新记录22种。这项研究增加了南马托格罗索州和潘塔纳尔地区记录的黄蜂群的5.2%。
{"title":"Record of bees and wasps (Insecta: Hymenoptera) during the dry season in a floodplain in the South Pantanal, Mato Grosso do Sul, Brazil","authors":"N. G. Cipola, D. Pádua, K. Schoeninger, B. G. Oliveira, S. S. Gadelha, J. A. C. Zequi","doi":"10.12741/ebrasilis.v15.e1003","DOIUrl":"https://doi.org/10.12741/ebrasilis.v15.e1003","url":null,"abstract":"We reported the hymenopteran fauna (except Formicidae) in a floodable area in the South Pantanal, Mato Grosso do Sul, Brazil. The study was conducted in a riparian forest of the Miranda river, located in the Passo do Lontra region, Corumbá. The collection occurred in the dry season of August 2016 using different capture methods. A total of 137 individuals distributed in 18 families, 43 genera, and 64 morphospecies (10 nominal) were collected. The families with the greatest richness were Diapriidae and Ichneumonidae with 11 morphospecies each (17% of the total), followed by Platygastridae and Braconidae with 10 and nine, respectively. Two species were newly recorded for Brazil: Gryonoides pulchellus Dodd, 1920 (Platygastridae) and Losada penai Fritz, 1873 (Crabronidae), plus 22 new records for Mato Grosso do Sul. This study increases about 5.2% of the wasp fauna recorded in Mato Grosso do Sul, as well as for the Pantanal.","PeriodicalId":11746,"journal":{"name":"EntomoBrasilis","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89470224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"[Expression of Concern] Checklist to of Aquatic Heteroptera genera (Insecta: Hemiptera) from Brazilian Savanna (Cerrado Biome), with family and genera identification key","authors":"M. J. Martins-Silva","doi":"10.12741/ebrasilis.v15.e986","DOIUrl":"https://doi.org/10.12741/ebrasilis.v15.e986","url":null,"abstract":"Expression of Concern\u0000Process number: EB-PRMP-20220816-0001https://app.entomobrasilis.org/WithdrawalArticle","PeriodicalId":11746,"journal":{"name":"EntomoBrasilis","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88817618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-28DOI: 10.12741/ebrasilis.v15.e998
L. Torres, H. Benítez, J. Costa
The order Phasmatodea includes insects known as stick insects. In Brazil, few taxonomic, ecological or evolutionary studies have been published in recent years, the reason is related to the few number of researchers dedicated to this particular group. Cladomorphus phyllinus Gray is one of the largest Brazilian insects and perhaps one of the most studied species of Phasmatodea in the country. It is considered as a phytophagous, generalist, and feeds mainly on guava leaves (Psidium guajava), powder-puff (Calliandra sp.) or Angico (Piptania sp.). Females of this species reproduce in a sexual and asexual manner, by the production of diploid daughters from unfertilized eggs (thelytokous parthenogenesis). The absence of records on the reproductive capacity of virgin parthenogenetic females of C. phyllinus led us to record the longevity, fertility, and eggs viability of ten specimens. The results obtained were compared to those found in the scientific literature for mated females of the same species. The fertility and eggs viability were observed to be much lower for the parthenogenetic females when compared to the mated females; however, the longevity for virgin females was longer than that recorded in the literature for mated females.
{"title":"Longevity, fertility, and average eggs viability of parthenogenetic females of Cladomorphus phyllinus Gray (Phasmatodea - Phasmatidae)","authors":"L. Torres, H. Benítez, J. Costa","doi":"10.12741/ebrasilis.v15.e998","DOIUrl":"https://doi.org/10.12741/ebrasilis.v15.e998","url":null,"abstract":"The order Phasmatodea includes insects known as stick insects. In Brazil, few taxonomic, ecological or evolutionary studies have been published in recent years, the reason is related to the few number of researchers dedicated to this particular group. Cladomorphus phyllinus Gray is one of the largest Brazilian insects and perhaps one of the most studied species of Phasmatodea in the country. It is considered as a phytophagous, generalist, and feeds mainly on guava leaves (Psidium guajava), powder-puff (Calliandra sp.) or Angico (Piptania sp.). Females of this species reproduce in a sexual and asexual manner, by the production of diploid daughters from unfertilized eggs (thelytokous parthenogenesis). The absence of records on the reproductive capacity of virgin parthenogenetic females of C. phyllinus led us to record the longevity, fertility, and eggs viability of ten specimens. The results obtained were compared to those found in the scientific literature for mated females of the same species. The fertility and eggs viability were observed to be much lower for the parthenogenetic females when compared to the mated females; however, the longevity for virgin females was longer than that recorded in the literature for mated females.","PeriodicalId":11746,"journal":{"name":"EntomoBrasilis","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75355397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-14DOI: 10.12741/ebrasilis.v15.e993
K. Cavalcante, Taires Peniche, José Rodrigues Júnior, Geandro dos Santos Gama, Flávia Montagner, A. Galardo
Malaria vector mosquitoes belong to the genus Anopheles Meigen. The Amazon has been changing due to economic activities such as mining, logging, agriculture, and urbanization, leading to changes in malaria transmission patterns in this region. Therefore, this study aimed to survey Anopheles species in a peri-urban area of Macapá, state of Amapá, Eastern Amazon, Brazil. Human landing catches (HLC) and Shannon light traps were used to collect Anopheles adults at three points. We screened breeding sites in all accessible water reservoirs within a 2 km radius of each collection point to collect immatures and found two species: Anopheles (Nyssorhynchus) albitarsis s.l. Lynch-Arribalzága (35.7%) and Anopheles (Nyssorhynchus) braziliensis (Chagas) (64.3%). A total of 267 winged specimens of Anopheles were collected: A. (N.) braziliensis (62.9%), Anopheles (Anopheles) mattogrossensis Lutz & Neiva (11.6%), Anopheles (Nyssorhynchus) triannulatus s.l. (Neiva & Pinto) (11.6%), A. (N.) albitarsis s.l. Lynch-Arribálzaga (6.7%), Anopheles (Nyssorhynchus) darlingi Root (5.2%), Anopheles (Anopheles) peryassui Dyar & Knab (1.5%), and Anopheles (Nyssorhynchus) nuneztovari Galbadón (0.4%). Considering that Macapá has autochthonous malaria cases, our findings can contribute to developing public health measures in this municipality, therefore helping to protect its habitants.
{"title":"Composition of Anopheles Meigen (Diptera: Culicidae) in a peri-urban area of the Eastern Amazon","authors":"K. Cavalcante, Taires Peniche, José Rodrigues Júnior, Geandro dos Santos Gama, Flávia Montagner, A. Galardo","doi":"10.12741/ebrasilis.v15.e993","DOIUrl":"https://doi.org/10.12741/ebrasilis.v15.e993","url":null,"abstract":"Malaria vector mosquitoes belong to the genus Anopheles Meigen. The Amazon has been changing due to economic activities such as mining, logging, agriculture, and urbanization, leading to changes in malaria transmission patterns in this region. Therefore, this study aimed to survey Anopheles species in a peri-urban area of Macapá, state of Amapá, Eastern Amazon, Brazil. Human landing catches (HLC) and Shannon light traps were used to collect Anopheles adults at three points. We screened breeding sites in all accessible water reservoirs within a 2 km radius of each collection point to collect immatures and found two species: Anopheles (Nyssorhynchus) albitarsis s.l. Lynch-Arribalzága (35.7%) and Anopheles (Nyssorhynchus) braziliensis (Chagas) (64.3%). A total of 267 winged specimens of Anopheles were collected: A. (N.) braziliensis (62.9%), Anopheles (Anopheles) mattogrossensis Lutz & Neiva (11.6%), Anopheles (Nyssorhynchus) triannulatus s.l. (Neiva & Pinto) (11.6%), A. (N.) albitarsis s.l. Lynch-Arribálzaga (6.7%), Anopheles (Nyssorhynchus) darlingi Root (5.2%), Anopheles (Anopheles) peryassui Dyar & Knab (1.5%), and Anopheles (Nyssorhynchus) nuneztovari Galbadón (0.4%). Considering that Macapá has autochthonous malaria cases, our findings can contribute to developing public health measures in this municipality, therefore helping to protect its habitants. \u0000 ","PeriodicalId":11746,"journal":{"name":"EntomoBrasilis","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79699417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-24DOI: 10.12741/ebrasilis.v15.e995
S. C. C. Francisco, G. C. Jacques, L. C. P. Silveira
Social wasp nests create an environment rich in resources, such as food and shelter, which consequently attract predators, parasites, and parasitoids. Parasitoids attacks can be one of the main causes of mortality among social wasps in the early stages of development. Therefore, the aim of this work is to report the occurrence of parasitoids in Mischocyttarus cassununga Von Ihering (Hymenoptera: Vespidae: Polistinae) nests, in an area of Cerrado, at the Federal Institute of Education, Science and Technology of Minas Gerais (IFMG) - Campus Bambuí, Brazil. There was an emergence of four parasitoids from two nests of M. cassununga, identified as Megaselia scalaris (Loew) (Diptera: Phoridae), the first record of this parasitoid in M. cassununga in a Cerrado area.
群居黄蜂的巢穴创造了一个资源丰富的环境，比如食物和住所，因此吸引了捕食者、寄生虫和拟寄生虫。在发育的早期阶段，寄生蜂的攻击可能是导致群居黄蜂死亡的主要原因之一。因此，本研究的目的是报告巴西米纳斯吉拉斯州联邦教育、科学和技术研究所(IFMG) -校园Bambuí塞拉多地区cassununga Von Ihering(膜翅目:蜂科:Polistinae)巢中寄生蜂的发生情况。在塞拉多地区2个卡苏南家蝇巢中发现4只寄生蜂，鉴定为鳞翅目大蝇(Megaselia scalaris (Loew))(双翅目:蚜科)，为卡苏南家蝇在塞拉多地区的首次记录。
{"title":"Occurrence of Megaselia scalaris Loew (Diptera: Phoridae) in Mischocyttarus cassununga Von Ihering (Hymenoptera: Vespidae: Polistinae) nests","authors":"S. C. C. Francisco, G. C. Jacques, L. C. P. Silveira","doi":"10.12741/ebrasilis.v15.e995","DOIUrl":"https://doi.org/10.12741/ebrasilis.v15.e995","url":null,"abstract":"Social wasp nests create an environment rich in resources, such as food and shelter, which consequently attract predators, parasites, and parasitoids. Parasitoids attacks can be one of the main causes of mortality among social wasps in the early stages of development. Therefore, the aim of this work is to report the occurrence of parasitoids in Mischocyttarus cassununga Von Ihering (Hymenoptera: Vespidae: Polistinae) nests, in an area of Cerrado, at the Federal Institute of Education, Science and Technology of Minas Gerais (IFMG) - Campus Bambuí, Brazil. There was an emergence of four parasitoids from two nests of M. cassununga, identified as Megaselia scalaris (Loew) (Diptera: Phoridae), the first record of this parasitoid in M. cassununga in a Cerrado area.","PeriodicalId":11746,"journal":{"name":"EntomoBrasilis","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81152221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-16DOI: 10.12741/ebrasilis.v15.e991
Eires Tosta Fernandes, C. J. Ávila, I. F. D. Silva
Any factor that may limit the leaf area of the crop in soybean may compromise its development and, consequently, its productivity. The aim of the study was to evaluate the effect of different levels of artificial defoliation performed in the vegetative and reproductive stages of two soybean cultivars, FT Campo Mourão and Brasmax Potência. The treatments consisted in: 1) Without defoliation throughout the culture cycle; 2) 16.7% defoliation in the vegetative stage; 3) 33.3% on vegetative stage; 4) 16.7% on reproductive stage; 5) 33.3% on reproductive stage; 6) 16.7% throughout the soybean cycle; 7) 33.3% defoliation throughout the soybean cycle. Regardless of the level of defoliation performed on soybeans, it was found that the cultivar Brasmax Potência presented the higher values of plant height, number of pods/plant and green weight of the aerial part, when compared to cultivar FT Campo Mourão. However, the number of pods/plant, green weight of the areal part, grain yield and weight of the seeds were not influenced by the defoliation intensities applied to the soybean. Based on the results, the threshold level of 30% of defoliation in the vegetative stage or 15% in the reproductive stage of soybean is still considered valid for the control of defoliating caterpillars in soybean crop.
任何可能限制大豆作物叶面积的因素都可能损害其发育，从而影响其生产力。本研究旨在评价不同水平的人工落叶对两个大豆品种FT Campo mour和Brasmax Potência营养和生殖阶段的影响。处理包括:1)整个培养周期不落叶;2)营养期落叶率16.7%;3)营养期33.3%;4)生殖期16.7%;5)生殖期33.3%;6)整个大豆周期16.7%;7)整个大豆周期的落叶率为33.3%。无论对大豆进行多大程度的落叶处理，与FT Campo mour相比，品种Brasmax Potência的株高、荚果数/株和地上部分的绿重均较高。但对单株荚果数、面部绿重、籽粒产量和籽粒重的影响不受不同落叶处理强度的影响。综上所述，大豆营养期脱叶率30%或生殖期脱叶率15%的阈值水平仍可作为防治大豆作物脱叶毛虫的有效阈值。
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Pub Date : 2022-06-01DOI: 10.12741/ebrasilis.v15.e994
Maria Luiza Santana Coelho, T. P. Gouvêa, M. Clemente, Marcos Magalhães de Souza
Ecosystem fragmentation negatively affects biological diversity and compromises different environmental services. This situation occurs in two important biomes in Brazil, the Atlantic Forest and the Cerrado. There is little information on the effects of fragmentation on animal taxa, including social wasps. It was hypothesized that fragments that are small in size and subject to anthropogenic pressures have reduced social wasp richness and colony numbers. This study aimed to investigate the effect of forest fragmentation on Polistinae richness and colony number at Atlantic Forest and Cerrado sites in southern central Minas Gerais State, southeastern Brazil. The study was conducted in three fragments, Mata do Baú, Cachoeira da Lajinha, and Cachoeira do Padeiro, from October 2020 to March 2021, using active collection to record social wasp species and colony numbers. A total of 42 species and 80 colonies were recorded in the three fragments. Forest fragment size alone did not influence social wasp communities, but communities were significantly affected by a combination of factors, including fragment size, adjacent vegetation, and anthropogenic pressures. Species richness was higher in Mata do Baú and Cachoeira da Lajinha, which did not differ from each other, than in Cachoeira do Padeiro; however, all fragments had exclusive communities. Therefore, an increase in anthropogenic pressure in any of the three fragments may lead to losses in social wasp species.
生态系统破碎化对生物多样性产生负面影响，损害不同的环境服务。这种情况发生在巴西的两个重要的生物群落，大西洋森林和塞拉多。关于破碎化对动物类群(包括群居黄蜂)的影响的信息很少。据推测，小碎片和受人为压力减少了社会黄蜂的丰富度和群体数量。本研究旨在研究巴西东南部米纳斯吉拉斯州中南部大西洋森林和塞拉多样地森林破碎化对Polistinae丰富度和群落数量的影响。该研究于2020年10月至2021年3月在三个片段Mata do Baú， Cachoeira da Lajinha和Cachoeira do Padeiro中进行，使用主动收集来记录社会黄蜂的种类和群体数量。3个片段共记录到42种、80个菌落。森林碎片大小本身对社会黄蜂群落没有影响，但碎片大小、邻近植被和人为压力等因素对社会黄蜂群落有显著影响。Mata do Baú和Cachoeira da Lajinha的物种丰富度均高于Cachoeira do Padeiro;然而，所有的片段都有专属的群落。因此，这三个片段中任何一个的人为压力增加都可能导致社会黄蜂物种的损失。
{"title":"Effect of forest fragment size on Polistinae (Hymenoptera, Vespidae) in a transitional area of Cerrado and Atlantic Forest in south central Minas Gerais state, Brazil","authors":"Maria Luiza Santana Coelho, T. P. Gouvêa, M. Clemente, Marcos Magalhães de Souza","doi":"10.12741/ebrasilis.v15.e994","DOIUrl":"https://doi.org/10.12741/ebrasilis.v15.e994","url":null,"abstract":"Ecosystem fragmentation negatively affects biological diversity and compromises different environmental services. This situation occurs in two important biomes in Brazil, the Atlantic Forest and the Cerrado. There is little information on the effects of fragmentation on animal taxa, including social wasps. It was hypothesized that fragments that are small in size and subject to anthropogenic pressures have reduced social wasp richness and colony numbers. This study aimed to investigate the effect of forest fragmentation on Polistinae richness and colony number at Atlantic Forest and Cerrado sites in southern central Minas Gerais State, southeastern Brazil. The study was conducted in three fragments, Mata do Baú, Cachoeira da Lajinha, and Cachoeira do Padeiro, from October 2020 to March 2021, using active collection to record social wasp species and colony numbers. A total of 42 species and 80 colonies were recorded in the three fragments. Forest fragment size alone did not influence social wasp communities, but communities were significantly affected by a combination of factors, including fragment size, adjacent vegetation, and anthropogenic pressures. Species richness was higher in Mata do Baú and Cachoeira da Lajinha, which did not differ from each other, than in Cachoeira do Padeiro; however, all fragments had exclusive communities. Therefore, an increase in anthropogenic pressure in any of the three fragments may lead to losses in social wasp species.","PeriodicalId":11746,"journal":{"name":"EntomoBrasilis","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74492798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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