Singh, Akhilesh KumarKumar, Saurabh2022-01-242022-01-242021-10-13SAURABH KUMAR 2021. STUDY ON THE PEST COMPLEX ON LATE CABBAGE AND BIO-EFFICACY OF NOVEL INSECTICIDES AGAINST Plutella xylostella. M.Sc. Thesis. 63p.https://krishikosh.egranth.ac.in/handle/1/5810181189India is the second largest producer of vegetables and contributes 14% of the total word production of vegetable. Out of the vegetable crops, cabbage is an important vegetable crop and have anticancer property; due to presence of indole-3corbinol. It is rich source of fibre, iron, calcium, potassium, vitamin C, vitamin K and vitamin B6 and protein. Cabbage challenge by biotic and abiotic stresses causing productivity losses. Among biotic constraint for productivity in subsistence crop protection pattern, P. xylostella is a most detrimental insect pest of cabbage. The present study was carried out to find the pest complex of cabbage, the effect of abiotic factors on their population and bio-efficacy of novel molecules against P. xylostella on cabbage. There were five insect pests were recorded viz. diamondback moth (P. xylostella), tobacco caterpillar (Spodoptera litura), gram pod borer (Helicoverpa armigera), mustard aphid (Lipaphis erysimi) and cabbage aphids (Bravicoryne brassicae) were observed on cabbage. Among these insect pests, diamondback moth (P. xylostella) was the key pest. The maximum and minimum temperature had significant positive correlation (0.838") and (0.881*) respectively. The chlorantraniliprole and cyantraniliprole were significantly superior over rest of the treatments in reduction of larval population of P. xylostella on cabbage. The field bioefficacy of chlorantraniliprole, cyantraniliprole, flubendiamide and emamectin benzoate were statistically at par to each other and these treatments were significantly superior over rest of the treatments. 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. Chlorantraniliprole, cyantraniliprole, flubendiamide and emamectin benzoate are best alternatives of conventional insecticides in order to manage the P. xylostella larvae in the field and make more lucrative by protect the loss of yield.EnglishThesis