Pub Date : 2023-03-31DOI: 10.33307/entomon.v48i1.852
B. V. Mahendra, M. Prathibha, R. Kavitha
Cuticular hydrocarbons are the major organic compounds synthesized by oenocytes. The CHCs act as sex pheromones, cell communicators, inhibits dissection, and chemotaxonomic cues. The CHCs were isolated from non-Drosophila species Phorticella striata (Sajjan and Krishnamurthy, 1975) (Diptera, Drosophilidae) by employing whole body extract through GCMS method. Among the identified organic compounds, a total of 38 compounds were obtained from male flies and 68 organic compounds were isolated from female flies, Majority of the CHCs identified were methyl branched alkanes, some of them were esters and alcohols. Male flies exhibit 15 specific CHCs in which tetradecane, 2, 6, 10-trimethylwas dominant with a relative abundance (15.60%) and cyclopropane tetradecanoic acid was the least found CHCs with a relative abundance (RA) of 0.75 per cent. The flies exhibit 28 female specific CHC‘s, among them tetradecane was dominant (r value of 19.20%) and Iodomethyl undecane was the least (RA=0.70%). Both male and female flies shared 23 CHCs, but the ratio among them showed great variance. Among the shared CHCs 3-Trifluoroacetoxy dodecane was dominant in female (RA=14.50%), the male exhibited RA of 4.66 per cent. In male flies 3-Trifluoroacetoxy pentadecane was most abundant CHC (RA=10.90%), than female (4.31%).
{"title":"Isolation and characterization of sex specific cuticular hydrocarbons in non-Drosophila, Phorticella striata (Sajjan and Krishnamurthy, 1975) (Diptera, Drosophilidae)","authors":"B. V. Mahendra, M. Prathibha, R. Kavitha","doi":"10.33307/entomon.v48i1.852","DOIUrl":"https://doi.org/10.33307/entomon.v48i1.852","url":null,"abstract":"Cuticular hydrocarbons are the major organic compounds synthesized by oenocytes. The CHCs act as sex pheromones, cell communicators, inhibits dissection, and chemotaxonomic cues. The CHCs were isolated from non-Drosophila species Phorticella striata (Sajjan and Krishnamurthy, 1975) (Diptera, Drosophilidae) by employing whole body extract through GCMS method. Among the identified organic compounds, a total of 38 compounds were obtained from male flies and 68 organic compounds were isolated from female flies, Majority of the CHCs identified were methyl branched alkanes, some of them were esters and alcohols. Male flies exhibit 15 specific CHCs in which tetradecane, 2, 6, 10-trimethylwas dominant with a relative abundance (15.60%) and cyclopropane tetradecanoic acid was the least found CHCs with a relative abundance (RA) of 0.75 per cent. The flies exhibit 28 female specific CHC‘s, among them tetradecane was dominant (r value of 19.20%) and Iodomethyl undecane was the least (RA=0.70%). Both male and female flies shared 23 CHCs, but the ratio among them showed great variance. Among the shared CHCs 3-Trifluoroacetoxy dodecane was dominant in female (RA=14.50%), the male exhibited RA of 4.66 per cent. In male flies 3-Trifluoroacetoxy pentadecane was most abundant CHC (RA=10.90%), than female (4.31%).","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84951125","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 : 2023-03-31DOI: 10.33307/entomon.v48i1.857
Reports a subterranean termite species Microcerotermes lahorensis Akhtar from Kerala, India, for the first time. The species was only reported from the type locality Lahore, Pakistan, and was endemic to the country. This new record thus changes the endemic status of the species and reaffirms the cosmotropical nature of the genus Microcerotermes.
{"title":"First record of Microcerotermes lahorensis Akhtar (Blattodea, Isoptera, Termitidae) from India","authors":"","doi":"10.33307/entomon.v48i1.857","DOIUrl":"https://doi.org/10.33307/entomon.v48i1.857","url":null,"abstract":"Reports a subterranean termite species Microcerotermes lahorensis Akhtar from Kerala, India, for the first time. The species was only reported from the type locality Lahore, Pakistan, and was endemic to the country. This new record thus changes the endemic status of the species and reaffirms the cosmotropical nature of the genus Microcerotermes. ","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86806156","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 : 2023-03-31DOI: 10.33307/entomon.v48i1.849
Onomarchus uninotatus (Orthoptera, Tettigoniidae), one of the neotropical Pseudophyllinae is recorded on the jackfruit (Artocarpus heterophyllus) var. Vietnam Super Early at Thrissur, Kerala, India. This is a new distributional report of the species from Kerala and additional new documentation as a serious pest of jackfruit from India. The nymphs and adults are nocturnal in habit and feed on the leaves resulting in withering and drying of the leaves giving a burned up appearance to the canopy. The species exhibited colour polyphenism with green and brown morphs in the nymphal stages. A detailed description of the nature of damage caused by the pest is given.
{"title":"Record of Onomarchus uninotatus (Serville, 1838) (Orthoptera, Tettigoniidae) as a pest of jackfruit from Kerala, India","authors":"","doi":"10.33307/entomon.v48i1.849","DOIUrl":"https://doi.org/10.33307/entomon.v48i1.849","url":null,"abstract":"Onomarchus uninotatus (Orthoptera, Tettigoniidae), one of the neotropical Pseudophyllinae is recorded on the jackfruit (Artocarpus heterophyllus) var. Vietnam Super Early at Thrissur, Kerala, India. This is a new distributional report of the species from Kerala and additional new documentation as a serious pest of jackfruit from India. The nymphs and adults are nocturnal in habit and feed on the leaves resulting in withering and drying of the leaves giving a burned up appearance to the canopy. The species exhibited colour polyphenism with green and brown morphs in the nymphal stages. A detailed description of the nature of damage caused by the pest is given.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"59 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77757507","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 : 2023-03-31DOI: 10.33307/entomon.v48i1.856
The nasutiform termite species Ahmaditermes emersoni Maiti is reported from Meghalaya, India for the first time. All the studied samples of the species were collected from betel nut plantation in Mawlynnong area of East Khasi Hill district of the state. Morphology of both the soldier and worker castes of the species was studied in detail and the identification was done based on their morphological characteristics. Redescription of morphology and revision of morphometric of both the soldier and worker castes are provided in this article. With the record of this species, the genus Ahmaditermes is also reported for the first time from the state.
{"title":"First record of Ahmaditermes emersoni Maiti (Isoptera, Termitidae, Nasutitermitinae) from Meghalaya, India","authors":"","doi":"10.33307/entomon.v48i1.856","DOIUrl":"https://doi.org/10.33307/entomon.v48i1.856","url":null,"abstract":"The nasutiform termite species Ahmaditermes emersoni Maiti is reported from Meghalaya, India for the first time. All the studied samples of the species were collected from betel nut plantation in Mawlynnong area of East Khasi Hill district of the state. Morphology of both the soldier and worker castes of the species was studied in detail and the identification was done based on their morphological characteristics. Redescription of morphology and revision of morphometric of both the soldier and worker castes are provided in this article. With the record of this species, the genus Ahmaditermes is also reported for the first time from the state.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91007275","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 : 2023-03-31DOI: 10.33307/entomon.v48i1.844
For determination of morphological and biochemical basis of resistance in cowpea against the pod borers (Maruca vitrata F. and Helicoverpa armigera Hübner), ten cowpea cultivars were evaluated during kharif 2017 and 2018. Results revealed that cultivars having indeterminate growth, yellow flower, light green and short pods as well as long peduncle recorded lower pod borer population. Correlation between different plant morphological characters and the larval population were found non-significant. The cultivars having low protein, high phenol and low total soluble sugars in flowers and immature pods recorded lower the larval population. The correlation between biochemical components of flowers and larval population were found to be non-significant. Biochemical components of immature pods revealed that phenol exhibited significant negative relationship with larval population, whereas, correlation of total soluble sugars of immature pods exhibited significant positive association with larval population. Among the cultivars screened, GC-6 and GC-1605 were found to be consistently resistant based on different morphological and biochemical factors and pod borer infestation. Relatively GC-1609, GC-1611 and GC-2 showed lesser pod borer infestation. GC-1606 was found to be highly susceptible.
为了确定豇豆对荚果螟虫(Maruca vitrata F.)和棉铃虫(Helicoverpa armigera h bner)抗性的形态和生化基础，在2017年和2018年对10个豇豆品种进行了抗性评价。结果表明，生长不确定、花黄、豆荚短、花梗长、淡绿色的品种豆荚螟数量较低。不同植物形态性状与幼虫种群的相关性不显著。低蛋白质、高酚和低总可溶性糖的品种的花和未成熟豆荚的幼虫数量较少。花的生化成分与幼虫数量的相关性不显著。未熟豆荚中酚含量与幼虫数量呈显著负相关，而总可溶性糖含量与幼虫数量呈显著正相关。在筛选的品种中，GC-6和GC-1605在不同形态和生化因素及螟虫侵染情况下具有一致的抗性。相对而言，GC-1609、GC-1611和GC-2的螟患较少。GC-1606被发现是高度敏感的。
{"title":"Morphological and biochemical basis of resistance against the pod borers Maruca vitrata F. and Helicoverpa armigera Hübner in cowpea","authors":"","doi":"10.33307/entomon.v48i1.844","DOIUrl":"https://doi.org/10.33307/entomon.v48i1.844","url":null,"abstract":"For determination of morphological and biochemical basis of resistance in cowpea against the pod borers (Maruca vitrata F. and Helicoverpa armigera Hübner), ten cowpea cultivars were evaluated during kharif 2017 and 2018. Results revealed that cultivars having indeterminate growth, yellow flower, light green and short pods as well as long peduncle recorded lower pod borer population. Correlation between different plant morphological characters and the larval population were found non-significant. The cultivars having low protein, high phenol and low total soluble sugars in flowers and immature pods recorded lower the larval population. The correlation between biochemical components of flowers and larval population were found to be non-significant. Biochemical components of immature pods revealed that phenol exhibited significant negative relationship with larval population, whereas, correlation of total soluble sugars of immature pods exhibited significant positive association with larval population. Among the cultivars screened, GC-6 and GC-1605 were found to be consistently resistant based on different morphological and biochemical factors and pod borer infestation. Relatively GC-1609, GC-1611 and GC-2 showed lesser pod borer infestation. GC-1606 was found to be highly susceptible.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"89 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83441658","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 : 2022-12-31DOI: 10.33307/entomon.v47i4.792
Eureka Mondal, K. Chakraborty
Rice yellow stem borer (YSB), Scirpophaga incertulas Walker is one of the major destructive insect pests rendering huge crop damage. Nine insecticide formulations, either solely or in combinations were applied in the rice (var. Lalat) field for two consecutive seasons during 2019-2021 to assess their efficacy to suppress YSB population and to stabilize yield. The combination of flubendiamide (480 SC) @80 g a.s.ha-1 on 45 DAT and deltamethrin (1%) + triazophos (35%) @300 g a.i.ha-1 on 80 DAT, treated the rice crop, recorded minimum YSB incidence (4.14 egg clutches, 4.78 larvae and adults 3.17/5 hills) and damage (2.12% dead hearts (DH) and 1.47 white ear (WE). This treatment gave significantly higher grain yield (3.63 t ha-1), an increase of 45.78 per cent over control. The incidence (12.21 egg clutches, 14.12 larvae and adults 11.76/5 hills) and crop damage (14.83 DH and 11.10% WE) was maximum in the treatment, neem seed kernel extract (5%) @50 ml L-1 at 15 day intervals after transplanting and neem leaf extract (5%) @7 ml a.s. L-1 on 35, 50, 65 and 80 DAT, resulting in minimum yield (2.88 t ha-1). Other combinations of insecticide application gave variable results.
水稻黄茎螟虫(Scirpophaga incertulas Walker)是严重危害水稻的主要害虫之一。2019-2021年连续两季在拉拉特水稻(var. Lalat)田间单独或联合施用9种杀虫剂配方，以评估其抑制YSB种群和稳定产量的效果。氟虫胺(480 SC) + 80 g a.a.a.ha -1 (45 DAT) +溴氰菊酯(1%)+三唑磷(35%)+ 300 g a.i.ha-1 (80 DAT)组合处理水稻，YSB发生率最低(4.14个卵窝，4.78个幼虫和成虫3.17/5)，危害最小(2.12%死心(DH)和1.47个白穗(WE))。该处理显著提高了籽粒产量(3.63 t hm -1)，比对照提高了45.78%。在移栽后15 d，印楝籽仁提取物(5%)每隔50 ml L-1，印楝叶提取物(5%)每隔35、50、65和80 d，印楝叶提取物每隔7 ml a-1，产量最低(2.88 t ha-1)，发生率(12.21个卵窝，14.12个幼虫和11.76/5山)和作物危害(14.83 DH和11.10% WE)最高。其他杀虫剂组合施用的结果不尽相同。
{"title":"Relative efficacy of selected insecticides to check rice yellow stem borer Scirpophaga incertulas (Walker) (Lepidoptera, Pyralidae) at Hooghly, West Bengal, India","authors":"Eureka Mondal, K. Chakraborty","doi":"10.33307/entomon.v47i4.792","DOIUrl":"https://doi.org/10.33307/entomon.v47i4.792","url":null,"abstract":"Rice yellow stem borer (YSB), Scirpophaga incertulas Walker is one of the major destructive insect pests rendering huge crop damage. Nine insecticide formulations, either solely or in combinations were applied in the rice (var. Lalat) field for two consecutive seasons during 2019-2021 to assess their efficacy to suppress YSB population and to stabilize yield. The combination of flubendiamide (480 SC) @80 g a.s.ha-1 on 45 DAT and deltamethrin (1%) + triazophos (35%) @300 g a.i.ha-1 on 80 DAT, treated the rice crop, recorded minimum YSB incidence (4.14 egg clutches, 4.78 larvae and adults 3.17/5 hills) and damage (2.12% dead hearts (DH) and 1.47 white ear (WE). This treatment gave significantly higher grain yield (3.63 t ha-1), an increase of 45.78 per cent over control. The incidence (12.21 egg clutches, 14.12 larvae and adults 11.76/5 hills) and crop damage (14.83 DH and 11.10% WE) was maximum in the treatment, neem seed kernel extract (5%) @50 ml L-1 at 15 day intervals after transplanting and neem leaf extract (5%) @7 ml a.s. L-1 on 35, 50, 65 and 80 DAT, resulting in minimum yield (2.88 t ha-1). Other combinations of insecticide application gave variable results.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77275367","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 : 2022-12-31DOI: 10.33307/entomon.v47i4.793
J. Falswal, R. Akoijam, Nandakumar Singh Haorongbam, D. Dey
Distributional records of the Halictinae bees of the genus Halictus (the subgenus Seladonia), viz., H. lucidipennis Smith, H. propinquus Vachal, genus Lasioglossum (the subgenus Ctenomia) albescens (Smith, 1853), L. cavernifrons Bluthgen, 1926, L. sikkimense (Blüthgen, 1926), L. splendidulum (Vachal, 1895), L. vagans (Smith, 1857) and genus Patellapis (Pachyhalictus) liodoma (Vachal, 1895), P. reticulosa (Dalla Torre, 1896) from North-East India, Manipur are listed. Re-described the female specimen, along with the collection site.
{"title":"New records of Tribe Halictini (Hymenoptera: Halictidae: Halictinae) from Manipur, India","authors":"J. Falswal, R. Akoijam, Nandakumar Singh Haorongbam, D. Dey","doi":"10.33307/entomon.v47i4.793","DOIUrl":"https://doi.org/10.33307/entomon.v47i4.793","url":null,"abstract":"Distributional records of the Halictinae bees of the genus Halictus (the subgenus Seladonia), viz., H. lucidipennis Smith, H. propinquus Vachal, genus Lasioglossum (the subgenus Ctenomia) albescens (Smith, 1853), L. cavernifrons Bluthgen, 1926, L. sikkimense (Blüthgen, 1926), L. splendidulum (Vachal, 1895), L. vagans (Smith, 1857) and genus Patellapis (Pachyhalictus) liodoma (Vachal, 1895), P. reticulosa (Dalla Torre, 1896) from North-East India, Manipur are listed. Re-described the female specimen, along with the collection site.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75959743","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 : 2022-12-31DOI: 10.33307/entomon.v47i4.795
Sucheta Mohapatra, N. Mohanty, P. Kar
Altitudinal variation and role of leaf nutrients in the host plants of tasar silkworm Anthraea mylitta Drury (Lepidoptera, Saturniidae) influences, the rearing, grainage and quantitative traits of tasar and in the quality of cocoon formed. The present works analysed the nutritional status of the tasar host plant leaves of asan (Terminalia tomentosa) and arjun (T. arjuna) collected from Kendujuani (508 m ASL), Mudrajodi (223 m ASL) and Kuliana (64 m ASL) in the district of Mayurbhanj, in Similipal Biosphre Reserve, Odisha. The study revealed that, nutritional value of asan leaves is better at a higher altitude (Kendujuani). The concentration of ascorbic acid in the leaves of asan and arjun was found higher in the leaves from Kendujuani.
柞蚕寄主植物叶片养分的海拔变异及作用对柞蚕的饲养、成粒、数量性状及成茧质量的影响。本文分析了在奥里萨邦相似生物圈保护区Mayurbhanj区的Kendujuani (508 m ASL)、Mudrajodi (223 m ASL)和Kuliana (64 m ASL)采集的asan (Terminalia tomentosa)和arjun (T. arjuna)的tasar寄主植物叶片的营养状况。研究表明，山牙叶的营养价值在海拔越高越好(Kendujuani)。在牙山和阿琼的叶子中发现抗坏血酸的浓度在肯杜华尼的叶子中较高。
{"title":"Altitude specific leaf quality in the host plants of tasar silkworm Anthraea mylitta Drury (Lepidoptera, Saturniidae) in Similipal Biosphere Reserve, Odisha, India","authors":"Sucheta Mohapatra, N. Mohanty, P. Kar","doi":"10.33307/entomon.v47i4.795","DOIUrl":"https://doi.org/10.33307/entomon.v47i4.795","url":null,"abstract":"Altitudinal variation and role of leaf nutrients in the host plants of tasar silkworm Anthraea mylitta Drury (Lepidoptera, Saturniidae) influences, the rearing, grainage and quantitative traits of tasar and in the quality of cocoon formed. The present works analysed the nutritional status of the tasar host plant leaves of asan (Terminalia tomentosa) and arjun (T. arjuna) collected from Kendujuani (508 m ASL), Mudrajodi (223 m ASL) and Kuliana (64 m ASL) in the district of Mayurbhanj, in Similipal Biosphre Reserve, Odisha. The study revealed that, nutritional value of asan leaves is better at a higher altitude (Kendujuani). The concentration of ascorbic acid in the leaves of asan and arjun was found higher in the leaves from Kendujuani.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87472148","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 : 2022-12-31DOI: 10.33307/entomon.v47i4.801
M. R. Raj, M. Chellappan
Antifeedant activity of methanol and hexane extracts of aerial and root extract of Sphagneticola trilobata (L) pruski was tested against seven day old larvae of Spodoptera litura (Fab.) (Lepidoptera, Noctuidae) by no choice method of bioassay. A maximum antifeedant activity of 52.96 per cent was recorded at 0.1 per cent of methanol extract of aerial parts after 24 h of feeding. Root extracts exhibited low level of antifeedant activity against S. litura. At lower concentrations of 0.005, 0.01 and 0.03 per cent, there was no significant antifeedant activity. Antifeedant activity recorded after 48 h of feeding was similar to 24 h experiment but a slight reduction was noticed for 0.1 per cent of the methanol extract.
{"title":"Antifeedant activity of aerial and root extracts of Sphagneticola trilobata (L) Pruski on Spodoptera litura (F.) (Lepidoptera, Noctuidae)","authors":"M. R. Raj, M. Chellappan","doi":"10.33307/entomon.v47i4.801","DOIUrl":"https://doi.org/10.33307/entomon.v47i4.801","url":null,"abstract":"Antifeedant activity of methanol and hexane extracts of aerial and root extract of Sphagneticola trilobata (L) pruski was tested against seven day old larvae of Spodoptera litura (Fab.) (Lepidoptera, Noctuidae) by no choice method of bioassay. A maximum antifeedant activity of 52.96 per cent was recorded at 0.1 per cent of methanol extract of aerial parts after 24 h of feeding. Root extracts exhibited low level of antifeedant activity against S. litura. At lower concentrations of 0.005, 0.01 and 0.03 per cent, there was no significant antifeedant activity. Antifeedant activity recorded after 48 h of feeding was similar to 24 h experiment but a slight reduction was noticed for 0.1 per cent of the methanol extract.","PeriodicalId":87603,"journal":{"name":"Entomon; internationale Zeitschrift fur die gesamte Insektenkunde","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90487018","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 : 2022-12-31DOI: 10.33307/entomon.v47i4.791
Soliang Manyu, C. Elanchezhiyan, K. Sivasankaran, P. Basker
Investigation showed that Aedes albopictus (Skuse, 1894) of Chidambaram-Town, Annamalai-Nagar and Muthiah-Nagar of Tamil Nadu are still susceptible to the insecticide organophosphorus temephos with 98–100 mortality percentages. The resistance ratios of all the three sentinel sites are negligible. LC50 value was 0.002 - 0.003 ppm with high significance. It was the first temephos bioassay case study conducted on DENV vector Ae. albopictus in the selected sentinel sites and estimated lethal concentrations.
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