Bio-rational management of brinjal shoot and fruit borer under sub-arid zone of Rajasthan

In a field experiment efficacy of 7 biorational pesticides was evaluated against fruit borer (Leucinodes orbonalis Guenee) on brinjal. Emamectin benzoate 5 SC, Spinosad 45 SC, and Chlorfenapyr 10 SC were found to be the most effective treatments, exhibiting 8.07, 8.72 and 9.95% shoot infestation, respectively. Indoxacarb 14.5 SC (10.75%) and Malathion 50 EC (33.87%) were found to be moderately effective. On a number and weight basis, fruit infestation was the most successful treatment, whereas Metarhizium anisoplae 1.15 WP and Bacillus thuringiensis 5 WP caused 17.79 and 15.66% of shoot infestation, respectively. The most successful treatments were Emamectin benzoate 5 SC (8.00 and 7.76%), Spinosad 45 SC (9.11 and 8.42%), and Chlorfenapyr 10 SC (10.07 and 9.24%). Indoxacarb 14.5 SC and Malathion 50 EC were the moderately successful treatments; they produced infestation rates of 11.10 and 11.72% on a number basis and 10.66 and 11.88% on a weight basis, respectively. Bacillus thuringiensis 5 WP and Metarhizium anisoplae 1.15 WP were the least performing treatments, resulting in fruit infection rates of 16.64 and 15.57% and 17.13 and 14.22% on a weight and number basis, respectively. The treatment of Emamectin benzoate 5 SC gave the highest B:C ratio of 1:19, whereas Metarhizium anisoplae 1.15 WP (1:5) showed lowest - B:C ratio.