Diversity and incidence of insect pests in vegetables grown under protected cultivation and their management
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Date
2021-03
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Sher-e-Kashmir University of Agricultural Sciences and Technology Jammu, J&K
Abstract
Studies on the “Diversity and incidence of insect pests in vegetables grown under protected cultivation and their management” were carried out during 2020. The studies revealed entomofauna associated with tomato under protected cultivation includes, Myzus persicae (Sulzer), Helicoverpa armigera (Hübner), Bemisia tabaci (Gennadius), Liriomyza trifolii (Burgess), Spodoptera litura (Fabricius), Tetranychus urticae (Koch) and Coccinella septempunctata (Linnaeus). The Shannon Weiner diversity index (H') was higher in Samba (1.49), followed by Kathua (1.36) and Jammu district (1.13). The entomofauna associated with cucumber includes Thrips tabaci (Lindeman), Tetranychus urticae (Koch), Bactrocera cucurbitae (Coquillett), Bemisia tabaci (Gennadius), Aphis gossypii (Glover), Liriomyza trifolii (Burgess), Spodoptera litura (Fabricius), Syrphus spp. and Coccinella septempunctata (Linnaeus). The Shannon Weiner diversity index (H') was higher in Samba (1.16), followed by Kathua (1.09) and Jammu district (0.98).
Myzus persicae (Sulzer) and Bemisia tabaci (Gennadius) were recorded as major insect pests on tomato crop. The population of aphids commenced from 12th standard week in Jammu and Samba district, and from 14th standard week in Kathua district, with its peak population during 22nd standard week. The population of whitefly commenced from 12th standard week and peak population observed during 20th standard week. The population of aphid and whitefly were positively correlated with mean temperature and negatively correlated with mean relative humidity. Thrips tabaci (Lindeman) and Tetranychus urticae (Koch) were recorded as major insect pests on cucumber crop with commencement of population from 12th standard week and peak population observed during 20th standard week. The population of thrips and mites were positively correlated with mean temperature and negatively correlated with mean relative humidity. The average per cent loss in yield of tomato and cucumber in unprotected cultivation compared to protected cultivation was 35.50 and 27.20 per cent, respectively. Imidacloprid 17.8 SL (0.008%) was significantly superior in reducing the population of aphid and whitefly, while thiamethoxam 25 WG (0.1%) and propargite 57 EC (0.142%) were found to be more effective against thrips and mites, respectively.
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Preferred for your work_ Wani, A. A. 2021. Diversity and incidence of insect pests in vegetables grown under protected cultivation and their management. M.Sc. thesis, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, India