M. S. Abhishek ¹, B. C. Hanumanthaswamy ¹, T. Venkatesan ², K. Selvaraj ²

Affiliations
1 Department of Agricultural Entomology, University of Agricultural and Horticultural Sciences, Shivamogga - 577204, Karnataka, IN
2 ICAR - National Bureau of Agricultural Insect Resources, Hebbal, Bellary Road Bengaluru - 560024, Karnataka, IN

Abstract

The efficacy of different biocontrol agents, botanicals and a biorational insecticide were evaluated against whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae) in tomato under field conditions at Shivamogga, Karnataka during two seasons (Rabi 2018-2019 and summer 2019-2020). The results revealed that spiromesifen 240 SC @ 0.7 ml/L was the most effective in reducing the B. tabaci population i.e., 85.12 and 85.16 % reduction over untreated control during Rabi and summer, respectively followed by azadirachtin 5% @ 2 ml/l with reduction of 68.61 and 66.32 % over untreated control during Rabi and summer, respectively. The response of these treatments was also observed on the yield attributes, with highest fruit yield of 53.67 t/ha (6 pickings) in spiromesifen treatment followed by azadirachtin (52.93 t/ha), but the highest Benifit: Cost ratio was noticed in azadirachtin 5% (1:3.41), followed by spiromesifen 240 SC (1:3.38).

Keywords

Azadirachtin, Bemisia tabaci, Bioagents, Biorational Insecticide, Botanicals, Tomato, Spiromesifen.

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