Vol. 10, Special Issue 8 (2021)

Author(s):
Vikas Chauhan, Sunil Dutt Vashisht, Lochan Sharma and Vishal Gandhi

Abstract:
Losses due Leaf hopper (Amrasca biguttula biguttula) Ishida on okra were measured by comparing the average plant height, number of fruits and average fruit weight per plant in protected and unprotected plots. The protected plots recorded significantly higher average plant height, number of fruits and higher average fruit weight as compared to unprotected. Losses caused by leaf hopper in plant height, number of fruits and weight of fruits per plant were recorded up to 47.6, 50.0 and 57.2%, respectively in different findings. Seed treated with thiamethoxam 70 WS @ 5 g a.i./kg followed by two foliar sprays alternately with abamectin @ 15 g a.i./ha and spinosad @ 75 g.a.i./ha at fortnightly interval or the spray schedule of thiamethoxam @ 20 g a.i./ha followed by fipronil @ 50 g a.i./ha at fortnightly interval was found to be most effective strategy to manage leafhopper and shoot and fruit borer of okra. Heavy rainfall adversely affected population build-up of Earias spp. Temperature, rainfall, sun shine hours and RH showed non-significant positive correlation with jassid and white fly population. The temperature had a positive correlation while relative humidity had negative correlation with the population of mite.