Population dynamics of chilli thrips and mite in relation to weather parameters

Abstract

The field experiment was conducted at Spices Research Centre, BARI, Shibganj, Bogura, Bangladesh (geographic coordinates 25.0167° N, 89.3167° E) during Rabi season of 2019-2020 to study the population dynamics of chilli thrips and mite in relation to weather parameters. The infestation of thrips and mite started from 1^st week after sowing i.e. last week of August (35^th standard week) and remained in the crop field till to the crop maturity (4^th week of April) in the range of 0.54 to 7.40 thrips/leaf and 0.17 to 6.55 mite/leaf respectively. Thrips and mite attained first (5.60 thrips/leaf and 4.34 mite/leaf), second (5.04 thrips/leaf and 4.13 mite/leaf) and third as well as the highest peak (7.40 thrips/leaf and 6.55 mite/leaf) during 3^rd week of November, 1^st week of December and 3^rd week of April, respectively. Thrips and mite population are positively correlated with average temperature whereas negatively correlated with relative humidity and average rainfall.