Population fluctuation of yellow mite, Polyphagotarsonemus latus, (Bank) (Acari: Tarsonemidae) infesting chilli and its management in West Bengal

Abstract

The present study was conducted to find out the comparative bio-efficacy of combine product against Polyphagotarsonemus latus (Bank) and distribution pattern of yellow mite in chilli at ‘D’ Block Farm of BCKV, Kalyani, Nadia, West Bengal for consecutive two years 2015-16 to 2016-17 during Rabi season. The treatments schedules diafenthiuron 40.5% + acetamiprid 3.9% WP @ 600 g/ha was found the best for controlling yellow mite though, it is statistically at par with the same product when applied @ 500 g/ha. The height yield (4.82 t/ha) was obtained from T3 i.e. diafenthiuron 40.5% + acetamiprid 3.9% WP @ 600 g/ha followed by its next lower dose (T2 = diafenthiuron 40.5% + acetamiprid 3.9% WP) @ 500 g/ha (4.83t/ha). Population of yellow mite Polyphagotarsonemus latus (Bank) showed positive correlation with maximum temperature and maximum relative humidity whereas; minimum temperature, minimum relative humidity, rainfall and sunshine hour were showed negative correlation.