The present research was conducted at the Central Research Field of Department of Agricultural Entomology, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj during the Rabi season of 2021-22. The treatments used during the study were Metarhizium anisopliae, Beauveria bassiana, Karanj Oil, Neem Oil, Spinosad, Emamectin benzoate + Indoxacarb and Indoxacarb. The results revealed that highest percent reduction in larval population was observed in Emamectin benzoate 5% SG + Indoxacarb 14.5% SC (73.57%) and was most successful in bringing down the larval population. It is then followed by Spinosad 45% SC (65.03%), Indoxacarb 14.5% SC (59.02%), Beauveria bassiana (1x108 cfu) (54.87%), Metarhizium anisopliae (1x108 cfu) (50.92%), Neem Oil 2% (45.81%). While, Karanj Oil 2% prove to be the least effective treatment in reducing the larval population (37.53%).

The population trend of insect pest of sunflower was studied at North bank plain zone of river Brahmaputra, Biswanath district in the state of Assam during 2021-2022. The simple correlation study showed bright sunshine hour had a positive and significant correlation with the whitefly population relative humidity had a positive and significant correlation with the Aphis gossypii and Amrasca biguttula biguttula Ishida population; A. gossypii had positive and significant relation with maximum temperature and Spilosoma obliqua had negative and significant relation with relative humidity.

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