Vol. 11, Issue 1 (2022)

Author(s):
Ranjana Bali, Amit Kumar Singh, PK Kumawat, Monika Singh, Talim Hussain and RN Sharma

Abstract:
A study was carried out in Sher-e- Kashmir University of Agricultural Sciences and Technology, Jammu, Chatha, for investigating the seasonal incidence and to check the bio-efficacy of newer eco-friendly insecticides against whitefly, in correlation with the weather parameters. The study revealed that the cluster bean has been attacked by number of insect pests, but sucking pests like aphids, jassids and whitefly was seen to cause more damage to the crop in sub tropic Jammu. The study showed that the whitefly population was at its peak during 21^st standard week in 2020. The incidence of whitefly was when correlated with weather parameters it was found that the whitefly had positive correlation with temperature whereas it shows negative correlation with relative humidity and rainfall. The bio-efficacy of newer eco-friendly insecticides against whitefly revealed that among sprayed eco-friendly insecticides for the management of whitefly after two sprays Novaluron 10 EC gave best results and found best in reducing the whitefly population by 50.80 per cent in the field of cluster bean in sub-tropical Jammu region, followed by spinosad 45 EC with 49.53 per cent reduction and Metarrhizium anisopliae with 46.73 per cent. The study was concluded with considering whitefly, Bemisia tabaci (Genn.) as the major sucking pest in sub- tropics of Jammu region on cluster bean crop and spinosad as the most promising eco-friendly insecticide against whitefly and other sucking pest.