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Vol. 10, Special Issue 12 (2021)

Efficacy of different botanical and biopesticide against onion thrips (Thrips tabaci L.)

Author(s):
OS Mane, SM Galande, ND Tamboli and SG Bhalekar
Abstract:
The field experiment was conducted to evaluate efficacy of botanical and biopesticide against thrips on onion and was carried out at experimental farm of Entomology section, College of Agriculture, Pune during Rabi season 2020-21. The most successful treatment was fipronil 80% WDG @ 0.15 g/ litre, which had the lowest average thrips population per plant (4.24/plant), followed by Metarhizium anisoplae @ 108 conidia/g @ 5 g/litre (8.87/plant). Azadirachtin 3000 ppm @ 4 ml/litre (9.93/plant) and Neem seed extract 5% (10.62/plant) were the next two successful treatments. In comparison to the untreated control, Lecanicillium lecanii @ 5 g/litre (12.18/plant), Beauveria bassiana @ 5 g/litre (12.56/plant) and pongamia oil 5% @ 5 ml/litre (12.60/plant) were shown to be better. The average thrips population was much higher (34.47/plant) in the untreated control condition.
Fipronil 80% WDG @ 0.15 g/litre yielded the most onion bulbs (22.55 t/ha), followed by M. anisopliae @ 5 g/litre (19.55 t/ha), Azadirachtin 3000 ppm @ 4 ml/litre (18.71 t/ha), Neem seed extract 5% (18.61 t/ha), Pongamia oil 5% @ 5 ml/litre (17.71 t/ha), L. lecanii @ 5 g/litre (16.75 t/ha), B. bassiana @ 5 g/litre (16.26 t/ha).
The Fipronil 80% WDG @ 0.15 g/litre treatment had the highest incremental cost benefit ratio (ICBR) (1:8.17). The next treatments with highest ICBR ratio are M. anisopliae @ 5 g/litre (1: 7.72), Neem seed extract 5% (1: 6.03), and Azadirachtin 3000 ppm @ 4 ml/litre (1: 4.15). The ICBR ratio was lower in the Pongamia oil 5% @ 5 ml/litre (1: 2.85), L. lecanii @ 5 g/litre (1: 2.68) and B. bassiana @ 5 g/litre (1: 1.79) as compare to above treatment.
Pages: 656-663  |  693 Views  484 Downloads
How to cite this article:
OS Mane, SM Galande, ND Tamboli and SG Bhalekar. Efficacy of different botanical and biopesticide against onion thrips (Thrips tabaci L.). The Pharma Innovation Journal. 2021; 10(12S): 656-663.

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