Effect of weather parameters on incidence and abundance of gall midge (O. oryzae) in rice (var TN-I) grown in Ranchi, Jharkhand
Alka Kumari, Rabindra Prasad and Devendra Prasad
A field trial was conducted at Rice Research Farm of Birsa Agricultural University, RAC (Ranchi Agriculture College) Kanke, Ranchi during Kharif season of 2017 on rice variety TN-1 to monitor the incidence and abundance of rice gall midge in terms of percentage of silver shoot (SS%) caused by gall midge. silver shoot percent count was made at weekly interval starting from 14th days after sowing. The result revealed that the peak incidence attained its peak (39% SS) with hill (plant) infestation in 39th SMW (i.e. 24th Sep to 30th Sep). Silver shoot percent had significantly positive correlation with temperature (both minimum and maximum) while significantly negative correlation with sunshine hrs but RH (%), wind speed, rainfall, and no. of rainy days had non-significant correlation. The climate factors together able to explain the variation in SS% to the extent of 66.56% and coefficient of determination (R2) found to be significant i.e. 0.6656.
Alka Kumari, Rabindra Prasad, Devendra Prasad. Effect of weather parameters on incidence and abundance of gall midge (O. oryzae) in rice (var TN-I) grown in Ranchi, Jharkhand. J Entomol Zool Stud 2018;6(4):1329-1331.