Efficacy of Native, Commercial Bacillus thuringiensis and Fungal Formulations against Okra Shoot and Fruit Borer Reddy Ankireddy Jawahar1,*, Kumar D V Sai Ram1, Rao Ch Sreenivasa1, Prasannakumari V2, Roja V3 1Department of Entomology, Agricultural College-Bapatla 2Department of Plant Pathology, Agricultural College-Bapatla 3Agricultural Biotechnology, RARS, Lam, Acharya N.G Ranga Agricultural University, Guntur522101, India *Email: jawaharreddy84@gmail.com: ORCID ID: 0000-0003-2357-8326
Online Published on 04 January, 2024. Abstract Okra shoot and fruit borer commonly known as spotted bollworm is a major pest of the economically important crops, viz., cotton and okra. Field experiment was conducted with 13 treatments including seven native Bt isolate treatments viz., 49, 51, 52, 55, 16, HD1 and 493 along with commercial Bt treatment (Dipel), three Entomopathogenic fungal treatments viz., Metarhizium anisopliae, Beauveria bassiana, Metarhizium rileyi, one chemical check viz., chlorantraniliprole and untreated control. The cumulative efficacy of treatments tested for the management E. vitella on okra during kharif 2021-2022 revealed that all the treatments were found effective over untreated control (20.08%). Among the treatments, Chlorantraniliprole 18.5% SC @ 0.27 ml l-1 was found superior with lowest mean fruit infestation (8.05%) and it was on par with M. rileyi (1x108 CFU g-1) @ 5 g l-1 (9.70%), isolate 493 (1x1010 CFU g-1) @ 3 g l-1 (9.17%), M. anisopliae (1x108 CFU g-1) @ 5 g l-1 (9.90%) and isolate 16 (1x1010 CFU g-1) @ 3 g l-1 (9.87%). Top Keywords Earias vittella, Okra, Chlorantraniliprole, Metarhizium anisopliae, Beauveria bassiana, Bacillus thuringiensis, Management, Cumulative efficacy. Top |