Vol. 19 No. 3
Evaluation of novel insecticides against fruit borers in okra in the coastal belt of Odisha
Author(s): A. SASMAL AND A. K. NAYAK
Abstract: Investigations were carried out during Kharif, 2016, 2017 and 2018 at RRTTS, Coastal Zone, OUAT, Bhubaneswar to evaluate the efficacy of some novel insecticides against fruit borer, Earias vittella (Fabricius) and Earius insulana (Boisduval) on okra. Six novel insecticides along with one standard chemical check and an untreated control were imposed in RBD replicated thrice on okra variety ‘Utkal Gaurav’. Results revealed that Chlorantraniliprole 18.5%SC @50ml ha-1 recorded the least fruit damage (3.5%) with 85.1% reduction in fruit damage over untreated control and 72% reduction over the standard chemical (Triazophos 40% EC). Chlorantraniliprole 18.5% SC resulted in highest fruit yield (93.34q ha-1). Spinosad 45% SC, indoxacarb 15.8% EC and flubendiamide 39.35%SC. recorded 86.16q, 85.42q and 85.30q per hectare yield and were at par with each other. Highest economic returns were obtained in chlorantraniliprole ((Rs.56,842ha-1) with highest incremental B:C ratio (11.06:1.0). Among different insecticides, chlorantraniliprole 18.5% SC and emamectin benzoate 5% SC were found safer to natural enemies (coccinellid predators and spiders) whereas indoxacarb 15.8% EC was found relatively more toxic.
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