Pub Date : 2023-09-30DOI: 10.33307/entomon.v48i3.946
J.B. Hyzil, U. Gayathri Elayidam, K.V. Baiju
A study was focused on biocidal and repellent efficiencies of leaf extracts of Chromolaena odorata (L) (Asteraceae), Gliricidia sepium (Jacq.) (Fabaceae), Coleus aromaticus Benth, Hyptis suaveolens (L.)Poit. (Lamiaceae) and Artemisia vulgaris L. (Asteraceae), against Odoiporus longicollis, banana pseudostem weevil. Ethanol leaf extracts of the above plants were primarily analysed for the mortality and repellency activity, the results showed that among the extracts G. sepium was most effective. Further G. sepium in various solvents like petroleum ether, chloroform, ethyl acetate, ethanol and water were analysed for the biocidal and repellency assays, and found that, the ethyl acetate solvent of G. sepium elicited maximum effectiveness. The ethyl acetate extract of G. sepium is found as a promising biopesticide.
{"title":"Invitro screening of leaf extracts of selected plants from Lamiaceae, Asteraceae and Fabaceae against the mortality and repellency to Odoiporus longicollis (Olivier)","authors":"J.B. Hyzil, U. Gayathri Elayidam, K.V. Baiju","doi":"10.33307/entomon.v48i3.946","DOIUrl":"https://doi.org/10.33307/entomon.v48i3.946","url":null,"abstract":"A study was focused on biocidal and repellent efficiencies of leaf extracts of Chromolaena odorata (L) (Asteraceae), Gliricidia sepium (Jacq.) (Fabaceae), Coleus aromaticus Benth, Hyptis suaveolens (L.)Poit. (Lamiaceae) and Artemisia vulgaris L. (Asteraceae), against Odoiporus longicollis, banana pseudostem weevil. Ethanol leaf extracts of the above plants were primarily analysed for the mortality and repellency activity, the results showed that among the extracts G. sepium was most effective. Further G. sepium in various solvents like petroleum ether, chloroform, ethyl acetate, ethanol and water were analysed for the biocidal and repellency assays, and found that, the ethyl acetate solvent of G. sepium elicited maximum effectiveness. The ethyl acetate extract of G. sepium is found as a promising biopesticide.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135038375","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 : 2023-09-30DOI: 10.33307/entomon.v48i3.936
E. S. Thasnim, C. Bijoy, Dhaneesh Bhaskar
An updated checklist of the order Orthoptera of Kerala is provided. Eighty five species have been added to the existing checklist. A total of 215 species and 21 subspecies belonging to 154 genera under 18 families of two suborders are enumerated along with their distributional data across the state. Suborders Caelifera and Ensifera are represented by 127 and 88 species, respectively.
{"title":"Grasshoppers, Crickets and Katydids of Kerala, an updated checklist for the order Orthoptera","authors":"E. S. Thasnim, C. Bijoy, Dhaneesh Bhaskar","doi":"10.33307/entomon.v48i3.936","DOIUrl":"https://doi.org/10.33307/entomon.v48i3.936","url":null,"abstract":"An updated checklist of the order Orthoptera of Kerala is provided. Eighty five species have been added to the existing checklist. A total of 215 species and 21 subspecies belonging to 154 genera under 18 families of two suborders are enumerated along with their distributional data across the state. Suborders Caelifera and Ensifera are represented by 127 and 88 species, respectively.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135040077","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 : 2023-09-30DOI: 10.33307/entomon.v48i3.950
K.A. Sobhana, P. Girish Kumar, Sabu K. Thomas, V.D. Hegde
Six species (Platytomus indicus (Balthasar, 1941), P. nathani Pittino & Mariani, 1986, Rhyssemus karnatakaensis Pittino, 1984, R. procerus Petrovitz, 1973, R. loebli Petrovitz, 1975 and Neocalaphodius moestus (Fabricius,1801)) of the subfamily Aphodiinae (Coleoptera, Scarabaeidae) are first report from Kerala and two first report from south India. Descriptions of species with images are provided.
6种(Platytomus indicus (Balthasar, 1941)， P. nathani Pittino &;Mariani (1986)， Rhyssemus karnatakaensis Pittino (1984)， R. procerus Petrovitz (1973)， R. loebli Petrovitz(1975)和Neocalaphodius moestus (Fabricius,1801))是印度喀拉拉邦首次报道的蠓亚科(鞘翅目，金龟甲科)。提供了带有图像的物种描述。
{"title":"New distributional records of six Aphodiinae species (Coleoptera, Scarabaeidae) from south India","authors":"K.A. Sobhana, P. Girish Kumar, Sabu K. Thomas, V.D. Hegde","doi":"10.33307/entomon.v48i3.950","DOIUrl":"https://doi.org/10.33307/entomon.v48i3.950","url":null,"abstract":"Six species (Platytomus indicus (Balthasar, 1941), P. nathani Pittino & Mariani, 1986, Rhyssemus karnatakaensis Pittino, 1984, R. procerus Petrovitz, 1973, R. loebli Petrovitz, 1975 and Neocalaphodius moestus (Fabricius,1801)) of the subfamily Aphodiinae (Coleoptera, Scarabaeidae) are first report from Kerala and two first report from south India. Descriptions of species with images are provided.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135038215","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 : 2023-09-30DOI: 10.33307/entomon.v48i3.948
M.P. Reject Paul, C.F. Binoy
Seventeen species of blow fly belonging to four subfamilies and eight genera were recorded from Kerala based on field studies and literature. Out of the 17 species, seven are forensically significant, six are pollinators and two species each are carrion breeders and termite predators respectively. The distinguishing features and distribution of all the species are discussed.
{"title":"A check list of blow fly fauna (Diptera, Calliphoridae) of Kerala including forensically significant species","authors":"M.P. Reject Paul, C.F. Binoy","doi":"10.33307/entomon.v48i3.948","DOIUrl":"https://doi.org/10.33307/entomon.v48i3.948","url":null,"abstract":"Seventeen species of blow fly belonging to four subfamilies and eight genera were recorded from Kerala based on field studies and literature. Out of the 17 species, seven are forensically significant, six are pollinators and two species each are carrion breeders and termite predators respectively. The distinguishing features and distribution of all the species are discussed.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135038380","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 : 2023-09-30DOI: 10.33307/entomon.v48i3.940
Prashant N. Bavachikar, Hothur Lakshmi, P. J. Raju, Jianluca Tettamanti, Amr Mohamed, Anitha Mamillapalli
The early stage of an organism – embryonic stage, architects all the post embryonic developments which are governed by genetic and environmental conditions, but the effect of hot events during that stage remain obscure in the silkworm Bombyx mori L. Thus, APM1; a multivoltine parental breed of a ruling CB and APHO1 silkworm breed developed through induction of thermotolerance, and APHO1 breed to examine the impact of heat shock (HS) on the embryo and resulta nt larvae. Different developmental stages of embryo were exposed to varied HS temperatures for 2 h followed by a 2 h recovery period. After HS the eggs and the resultant larvae were reared under normal environmental conditions. Interestingly, 450C although determined as lethal temperature yielded vibrant larvae. Whereas APM1 and APHO1 eggs heat shocked at 350C exhibited increased hatching (91.66 and 69.33%), larval weight (1.72 and 3.33 g), effective rate of rearing (72.39 and 81.93%), cocoon weight (1.01 and1.6 g), shell weight (0.12 and 0.29 g), shell ratio (13.11 and 20.52%) and pupal weights (0.87 and1.29g) when compared to control APM1 and APHO1. Besides increased total protein content, expression of 205 kDa, 90 kDa and 70 kDa heat shock proteins and the glycogen content was found more on day - 3 compared to day - 2 in the embryos of APM1 and APHO1 which eventually declined as the embryonic development proceeded to hatching. This work shows that APM1 and APHO1 eggs had shown profound response to HS temperatures exhibiting varied acquired thermotolerance to overcome fluctuating environmental condition.
{"title":"Effect of heat shock on embryonic development and its impact on commercial traits of silkworm Bombyx mori. L","authors":"Prashant N. Bavachikar, Hothur Lakshmi, P. J. Raju, Jianluca Tettamanti, Amr Mohamed, Anitha Mamillapalli","doi":"10.33307/entomon.v48i3.940","DOIUrl":"https://doi.org/10.33307/entomon.v48i3.940","url":null,"abstract":"The early stage of an organism – embryonic stage, architects all the post embryonic developments which are governed by genetic and environmental conditions, but the effect of hot events during that stage remain obscure in the silkworm Bombyx mori L. Thus, APM1; a multivoltine parental breed of a ruling CB and APHO1 silkworm breed developed through induction of thermotolerance, and APHO1 breed to examine the impact of heat shock (HS) on the embryo and resulta nt larvae. Different developmental stages of embryo were exposed to varied HS temperatures for 2 h followed by a 2 h recovery period. After HS the eggs and the resultant larvae were reared under normal environmental conditions. Interestingly, 450C although determined as lethal temperature yielded vibrant larvae. Whereas APM1 and APHO1 eggs heat shocked at 350C exhibited increased hatching (91.66 and 69.33%), larval weight (1.72 and 3.33 g), effective rate of rearing (72.39 and 81.93%), cocoon weight (1.01 and1.6 g), shell weight (0.12 and 0.29 g), shell ratio (13.11 and 20.52%) and pupal weights (0.87 and1.29g) when compared to control APM1 and APHO1. Besides increased total protein content, expression of 205 kDa, 90 kDa and 70 kDa heat shock proteins and the glycogen content was found more on day - 3 compared to day - 2 in the embryos of APM1 and APHO1 which eventually declined as the embryonic development proceeded to hatching. This work shows that APM1 and APHO1 eggs had shown profound response to HS temperatures exhibiting varied acquired thermotolerance to overcome fluctuating environmental condition.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135038382","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 : 2023-09-30DOI: 10.33307/entomon.v48i3.945
A.P. Ranjith, Rajan Priyadarsanan
The morphologically diverse and cosmopolitan chalcidid genus, Chalcis includes 59 species. Most of the species are distributed in the temperate regions of the Northern Hemisphere. Till date only two species were recorded from the Oriental region. A new species, Chalcis biligiriensis from scrub forests of Biligiri Rangaswamy Temple Tiger Reserve (BRT) of the Western Ghats (Karnataka, India) is described. In addition, detailed illustrations of C. gibsoni Narendran for the first time along with an illustrated key to the identification of the Oriental species are provided.
{"title":"A new species of Chalcis Fabricius (Hymenoptera: Chalcididae) from south India","authors":"A.P. Ranjith, Rajan Priyadarsanan","doi":"10.33307/entomon.v48i3.945","DOIUrl":"https://doi.org/10.33307/entomon.v48i3.945","url":null,"abstract":"The morphologically diverse and cosmopolitan chalcidid genus, Chalcis includes 59 species. Most of the species are distributed in the temperate regions of the Northern Hemisphere. Till date only two species were recorded from the Oriental region. A new species, Chalcis biligiriensis from scrub forests of Biligiri Rangaswamy Temple Tiger Reserve (BRT) of the Western Ghats (Karnataka, India) is described. In addition, detailed illustrations of C. gibsoni Narendran for the first time along with an illustrated key to the identification of the Oriental species are provided.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135038384","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 : 2023-09-30DOI: 10.33307/entomon.v48i3.942
Kavya G. Pillai, C. Bijoy, Chris M. Cohen, Gigi Poulose
A checklist of robber fly species reported in Kerala, India based on literature survey is provided. In this list, 87 species of robber flies representing 25 genera and eight subfamilies are enumerated. The diversity of robber flies in Kerala was highlighted. Most of the species were reported from the protected forest areas of Kerala such as Ponmudi, Anamalai hills, Idamalayar, Thekkadi, Valparai, Chembra peak, Nilambur, Peermade, Walayar, Tenmalai and Silent Valley of the Western Ghats.
{"title":"A checklist of robber flies (Diptera, Asilidae) of Kerala, India","authors":"Kavya G. Pillai, C. Bijoy, Chris M. Cohen, Gigi Poulose","doi":"10.33307/entomon.v48i3.942","DOIUrl":"https://doi.org/10.33307/entomon.v48i3.942","url":null,"abstract":"A checklist of robber fly species reported in Kerala, India based on literature survey is provided. In this list, 87 species of robber flies representing 25 genera and eight subfamilies are enumerated. The diversity of robber flies in Kerala was highlighted. Most of the species were reported from the protected forest areas of Kerala such as Ponmudi, Anamalai hills, Idamalayar, Thekkadi, Valparai, Chembra peak, Nilambur, Peermade, Walayar, Tenmalai and Silent Valley of the Western Ghats.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135038368","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}
Investigations were carried out on the effect of seed dressing chemicals on the beneficial predators in the Bt cotton ecosystem during 2021-22. All seed dressing insecticides were found safer to the natural enemies as the population of Chrysoperla and ladybird beetle were found comparable to population of untreated control treatment up to 37 days of seed treatment. Similarly, the spider population was also not affected up to 17 days of seed treatment. Thereafter, the population of natural enemies was found higher with the higher prey (sucking pests) populations in the untreated check compared to treatments of seed dressing chemicals and in later treatments, there was no significant difference. The maximum population of spiders (0.52/plant), Chrysoperla (0.42/plant) and ladybird beetle (0.42/plant) was observed in the untreated control. Yield data indicated that the treatment with imidacloprid 70 WG @ 3 g kg-1 obtained highest seed cotton yield (21.69 q ha-1) and it was found superior over the other seed treatments.
在2021- 2022年间，对Bt棉生态系统中施用洗种药剂对有益捕食者的影响进行了研究。结果表明，在种子处理后37天内，黄蝶和瓢虫的种群数量与未处理对照相当，对天敌更安全。同样，在种子处理后的17天内，蜘蛛的数量也没有受到影响。结果表明，与施用药剂相比，未施用药剂处理的天敌种群数量和猎物(吸虫)种群数量均较高，而施用药剂处理的天敌种群数量与施用药剂处理的天敌种群数量无显著差异。未处理对照中蜘蛛(0.52只/株)、金蝶(0.42只/株)和瓢虫(0.42只/株)的数量最多。产量数据表明，吡虫啉70 WG @ 3 g kg-1处理棉籽产量最高(21.69 q ha-1)，优于其他种子处理。
{"title":"Impact of seed dressing insecticides on natural enemies of Bt cotton ecosystem","authors":"P.R. Parmar, G.R. Bhanderi, R.D. Patel, H.R. Desai","doi":"10.33307/entomon.v48i3.953","DOIUrl":"https://doi.org/10.33307/entomon.v48i3.953","url":null,"abstract":"Investigations were carried out on the effect of seed dressing chemicals on the beneficial predators in the Bt cotton ecosystem during 2021-22. All seed dressing insecticides were found safer to the natural enemies as the population of Chrysoperla and ladybird beetle were found comparable to population of untreated control treatment up to 37 days of seed treatment. Similarly, the spider population was also not affected up to 17 days of seed treatment. Thereafter, the population of natural enemies was found higher with the higher prey (sucking pests) populations in the untreated check compared to treatments of seed dressing chemicals and in later treatments, there was no significant difference. The maximum population of spiders (0.52/plant), Chrysoperla (0.42/plant) and ladybird beetle (0.42/plant) was observed in the untreated control. Yield data indicated that the treatment with imidacloprid 70 WG @ 3 g kg-1 obtained highest seed cotton yield (21.69 q ha-1) and it was found superior over the other seed treatments.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135038372","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 : 2023-09-30DOI: 10.33307/entomon.v48i3.949
Anjitha K Bhadran, N. Ramani
Ten species of mites were found associated with three species of termites, viz, Odontotermes obesus Rambur, 1842, O. feae Wasmann, 1896 and Nasutitermes gardneri Snyder, 1933. The collected mite species conformed to nine genera, four families and two orders. Among the ten species collected, nine of them were from the order Sarcoptiformes and cohort Astigmatina, while only one belonged to the order Trombidiformes. Seven species collected conformed to the family Acaridae. All mite species exhibited a phoretic relationship with their respective host insects. One adult mite, Premicrodispus paramaevi Hosseininaveh and Hajiqanbar, 2015 and nine deutonymphs were collected and described.
{"title":"Acarine species associated with subterranean termites (Blattodea, Termitidae)","authors":"Anjitha K Bhadran, N. Ramani","doi":"10.33307/entomon.v48i3.949","DOIUrl":"https://doi.org/10.33307/entomon.v48i3.949","url":null,"abstract":"Ten species of mites were found associated with three species of termites, viz, Odontotermes obesus Rambur, 1842, O. feae Wasmann, 1896 and Nasutitermes gardneri Snyder, 1933. The collected mite species conformed to nine genera, four families and two orders. Among the ten species collected, nine of them were from the order Sarcoptiformes and cohort Astigmatina, while only one belonged to the order Trombidiformes. Seven species collected conformed to the family Acaridae. All mite species exhibited a phoretic relationship with their respective host insects. One adult mite, Premicrodispus paramaevi Hosseininaveh and Hajiqanbar, 2015 and nine deutonymphs were collected and described.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135038389","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 : 2023-09-30DOI: 10.33307/entomon.v48i3.937
G.T. Pradeepkumar, V. Vijayasree, K.P. Subhash Chandran
Dissipation studies at single and double doses of chlorantraniliprole, thiamethoxam (25 and 50 g ai ha-1), and imidacloprid (20 and 40 g ai ha-1) were conducted on okra fruits following field application, and the residues were estimated using LC-MS/MS. The initial deposit of 0.42 and 0.80 mg kg-1 of chlorantraniliprole dissipated below quantitation level on the tenth day at single and double dosages. For thiamethoxam, the initial deposits of 0.42 and 0.71 mg kg-1 reached below quantitation level on tenth day at single dosage and on fifteenth day at double dosage; and for imidacloprid, the initial deposits are 0.10 and 0.16 mg kg-1 which dissipated below quantification level on fifth day. Growth dilution plays a significant role in the rate of dissipation of thiamethoxam when compared with imidacloprid and chlorantraniliprole when simulated dissipation rate due to growth dilution was calculated. The half-life of chlorantraniliprole, thiamethoxam and imidacloprid were 1.94 and 1.72 days, 1.88 and 1.99 days, 1.13 and 1.05 days, respectively for single and double dosages. Chlorantraniliprole, thiamethoxam and imidacloprid were found to be the safer insecticides with calculated waiting period of less than one day for single dosage.
田间施用氯虫腈、噻虫嗪(25和50 g ai ha-1)和吡虫啉(20和40 g ai ha-1)对秋葵果实进行了单剂量和双剂量的耗散研究，并利用LC-MS/MS进行了残留量估算。单、双给药第10天，氯虫腈的初始沉积量分别为0.42和0.80 mg kg-1。噻虫嗪单给药第10天、双给药第15天的初始沉积量分别为0.42和0.71 mg kg-1，均低于定量水平;吡虫啉的初始沉积量分别为0.10和0.16 mg kg-1，在第5 d时逐渐减少到定量水平以下。计算生长稀释对噻虫嗪的模拟耗散速率时，与吡虫啉和氯虫腈相比，生长稀释对噻虫嗪的耗散速率有显著影响。氯虫腈、噻虫嗪和吡虫啉单剂量和双剂量的半衰期分别为1.94和1.72 d、1.88和1.99 d、1.13和1.05 d。氯虫腈、噻虫嗪和吡虫啉是较安全的杀虫剂，单次给药等待期均小于1 d。
{"title":"Growth dilution and its effect on pesticide dynamics in Okra","authors":"G.T. Pradeepkumar, V. Vijayasree, K.P. Subhash Chandran","doi":"10.33307/entomon.v48i3.937","DOIUrl":"https://doi.org/10.33307/entomon.v48i3.937","url":null,"abstract":"Dissipation studies at single and double doses of chlorantraniliprole, thiamethoxam (25 and 50 g ai ha-1), and imidacloprid (20 and 40 g ai ha-1) were conducted on okra fruits following field application, and the residues were estimated using LC-MS/MS. The initial deposit of 0.42 and 0.80 mg kg-1 of chlorantraniliprole dissipated below quantitation level on the tenth day at single and double dosages. For thiamethoxam, the initial deposits of 0.42 and 0.71 mg kg-1 reached below quantitation level on tenth day at single dosage and on fifteenth day at double dosage; and for imidacloprid, the initial deposits are 0.10 and 0.16 mg kg-1 which dissipated below quantification level on fifth day. Growth dilution plays a significant role in the rate of dissipation of thiamethoxam when compared with imidacloprid and chlorantraniliprole when simulated dissipation rate due to growth dilution was calculated. The half-life of chlorantraniliprole, thiamethoxam and imidacloprid were 1.94 and 1.72 days, 1.88 and 1.99 days, 1.13 and 1.05 days, respectively for single and double dosages. Chlorantraniliprole, thiamethoxam and imidacloprid were found to be the safer insecticides with calculated waiting period of less than one day for single dosage.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135040076","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：