Singh, A.K.Bajpeyi, Madan Mohan2023-01-102023-01-102022-09-01Madan Mohan Bajpeyi. 2022. Study on the borer complex of okra and bioefficacy of novel insecticides against borer(s) Thesis, M.Sc.https://krishikosh.egranth.ac.in/handle/1/5810191690India is the second largest producer of vegetables and contributes 14% of the total word production of vegetable. In India, vegetable is grown on the area of 10073 MH and production 1, 83170 MT. Biotic constraints for productivity in subsistence crop protection pattern. A field experiment was conducted at the Experimental Farm of Entomology, Banda University of Agriculture& Technology, Banda 210001 during Kharif season of 2021- 2022. Six insect pests were recorded viz. pod borer (Helicoverpa armigera), shoot and fruit borer (Earias vittella), semilooper (Anomis flava) and in sucking group, three insect pests viz. whitefly (Bemisiatabaci), jassid (Amrascabiguttula biguttula) and aphid (Aphis gossypii) were observed on okra. Among these insect pests, E. vittela and H. armigera were key pest of okra. The maximum and minimum temperature had non-significant positive correlation (0.736NS and (0.069NS) respectively, with the larval population of the E. vittella. maximum temperature had non-significant correlation (0.684NS) with the larval population of the H. armigera, however, minimum temperature, relative humidity and wind velocity had non-significant correlation (- 0.226NS), (-0.294NS) and (0.723NS) respectively. At 5th day after 1st spray, in order to reduction of E. vittela larval population, chlorantraniliprole and cyantraniliprole were at par to each other and both treatments were significantly superior over rest of the treatments, whereas, all the chemical treatments were significantly superior over the control. Similar trends were observed at 10th day after 1st spray and almost similar trends were observed at 5th day and 10th day after 2 nd spray. At 5th day after 1st spray, in order to reduction of H. armigeralarval population, chlorantraniliprole and cyantraniliprole were at par to each other and both these treatments were significantly superior over rest of the treatments. All the treatments were significantly superior over control. Similar trends were observed at 10th day after 1st spray and almost similar trends were observed at 5th day and 10th day after 2nd spray. The field bio-efficacy of chlorantraniliprole, cyantraniliprole, flubendiamide, spinetoram, emamectin benzoate and indoxacarb were statistically at par to each other. The marketable yield of chlorantraniliprole and cyantraniliprole were at par to each other and both these treatments were significantly superior over rest of the treatments.EnglishThesis