Vol. 12, Special Issue 12 (2023)

Author(s):
Suvash Ch. Bala

Abstract:
The present studies were undertaken at District seed Farm, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal during Kharif, 2020 and Rabi, 2020-21 to evaluate the bio-efficacy of the combine product Diafenthiuron 30% + Pyriproxyfen 8% SE against yellow mite and whitefly in chilli ecosystem. In case of yellow mite, maximum mortality was recorded from the treatment T₄ = Diafenthiuron 30% + Pyriproxyfen 8% SE @ 1200 ml/ha which was statistically at par with the treatment T_{3 =} Diafenthiuron 30% + Pyriproxyfen 8% SE @ 1000ml/ha. The treatment T₅ = Diafenthiuron 50 WP @ 600 g/ha was recorded the next best result during the kharif, 2020 and rabi, 2020-21 seasons. However, in case of whitefly, maximum mortality was recorded from the treatment T₄ i.e., Diafenthiuron 30% + Pyriproxyfen 8% SE @ 1200 ml/ha followed by the treatment T₃=Diafenthiuron 30% + Pyriproxyfen 8% SE @ 1000 ml/ha). The treatment T₂= (Diafenthiuron 30% + Pyriproxyfen 8% SE @ 800 ml/ha) exhibited the next best option displayed good percentage of mortality during the period of investigation. However regarding yield is concern, maximum green chilli yield was obtained from the T₄ i.e., highest dose of Diafenthiuron 30% + Pyriproxyfen 8% SE @ 1200 ml/ha which was at par with treatment T₃.