1Department of Agriculture, Government of Andhra Pradesh, Guntur-522 034, Andhra Pradesh, India.
2Department of Entomology, Agricultural College, Acharya N.G. Ranga Agricultural University, Bapatla-522 101, Andhra Pradesh, India.
3Department of Plant Pathology, Agricultural College, Acharya N.G. Ranga Agricultural University, Bapatla-522 101, Andhra Pradesh, India.
4Department of Biotechnology, RARS-Lam, Acharya N.G. Ranga Agricultural University, Guntur-522 004, Andhra Pradesh, India.
*Corresponding Author: Rajasekhar Lella, Department of Agriculture, Government of Andhra Pradesh, Guntur-522 034, Andhra Pradesh, India. Email: rajagrico724@gmail.com
Present experiment was aimed to know the influence of weather on the incidence of thrips, a major sucking pest and potential vector of GBNV in blackgram.
The incidence of thrips complex for consecutive three seasons (spring 2019–20, autumn 2020–21, spring 2020–21) have been recorded from 7 DAS, till to crop maturity and correlated with weather parameters.
The thrips population was observed in the field approximately after 14 DAS. Overall view of thrips incidence in blackgram was more during autumn 2020–2021 (17.35 mean no of thrips per plant) compared to spring 2019–2020 (10.6) and 2020–2021 (10.10). Thrips population has showed a highly significant positive correlation with maximum temperature (0.74), minimum temperature (0.75), as well as with mean temperature (0.819) during rabi 2019. During spring 2020–21 only maximum temperature has shown significant positive correlation, but minimum and mean temperatures have shown positive correlation without any significance. Whereas during autumn 2020–21 temperature has shown positive correlation without any significance. Across the three seasons relative humidity has shown insignificant negative correlation.
Autumn, Incidence, Spring, Thrips
