Vol. 6, Issue 4, Part A (2020)

Abstract
Experiment was conducted in the biorational pesticide Laboratory, Department of Zoology, Entomology, Dayanand Brijendra Swaroop Post-Graduate College, Kanpur Nagar. The tests insect spotted bollworm, Earias vittella Fabricius (Lepidoptera:Noctuidae) is the serious pest, causing enormous qualitative and quantitative losses to various malvaceous vegetables particularly okra. The ten naturally occurring asteraceous plants growing agricultural field and wild area namely: aerial parts of Cichorium intybus (L.), Chromolaena odorata Linn., Chrysanthemum cinerariaefolium (trev.) Vis., Inula racemosa Hook. F., Mantisalca duriaeri Birq. Et Cavill., Rechardia tingitana (L.) Roth, Rhaponticum acaule (L.) DC, Scorzonera undulate Vahl, Acmella paniculata Well ex DC and Tagetes minuta (Linn.) were tested for their antifeedant biopotency against 3^rd instars larvae of spotted bollworm, Earias vittella Fabricius (Lepidoptera:Noctuidae) were used in the present investigation. Based on relative EC₅₀ values, the Chromolaena odorata extract showed highest protectivity (EC₅₀=0.0180) to the larvae of Earias vittella followed by Tagetes minuta (EC₅₀=0.0185), Cichorium intybus (EC₅₀=0.0204), Inula racemosa (EC₅₀=0.0218), Manisalca duriaeri (EC₅₀=0.239), Reichardia tingitana (EC₅₀ = 0.323), Rhaponticum acaule (EC₅₀ = 0.389), Scorzonera undulate. (EC₅₀ = 0.435), Spilanthes paniculata (EC₅₀=0.502) times less repellent than C. cinerariaefolium. (EC₅₀=1.370), respectively. Thus, Chromolaena odorata, Tagetes minuta and Cichorium intybus extractives may be a sound commercial herbal repellent alternatives to the more persistence synthetic pesticides for managing the against larvae of Earias vittella Fabricius.