Vol. 11, Issue 9 (2022)

Author(s):
Neha Kumari, BK Patidar, SK Jat, Laxman Singh Saini, Mangal Sukhi Meena and Mansor Kumari Lodha

Abstract:
The present study was laid out on cabbage (Brassica oleracea var. capitata L.) in a randomized block design with three replications and eight treatments. The results obtained during the correlation studies of aphids with environmental factors revealed that significant negative correlation with maximum and minimum temperatures. Whereas, showed significant positive correlation with morning relative humidity and non-significant positive with evening relative humidity. Efficacy obtained against cabbage aphids (Brevicoryne brassicae L.) on one days before pre-treatment population (PTP) and 3, 7, 10 days after treatment (DAT) recorded during first and second spray showed that all the chemical and bio-pesticides treatments were found significantly superior in reducing the aphid population on cabbage as compared to control respectively 3, 7, 10 days after treatment (DAT) in both sprays. Both spraying indicated that Azadirachtin @ 1000 ml/ha was found most effective over other treatments followed by Verticillium lecanii @ 2000 ml/ha, Emamectin benzoate @ 150 gm/ha, Spinosad @ 750 ml/ha, Metarhizium anisopliae @ 2500 ml/ha, Beauveria bassiana @ 1500 ml/ha, while, treatment Bacillus thuringiensis (kurstaki) @ 1000 ml/ha was least effective against the aphid. However, untreated control recorded maximum aphids population.