Vol. 10, Special Issue 8s (2021)

Author(s):
Kantesh KT, Dr. S Upendhar, Dr. K Vani Sree, Dr. S Ameer Basha and Dr. V Sridhar

Abstract:
Studies were conducted to record the seasonal incidence of whorl maggot and other major pests of rice at College farm, College of Agriculture, Rajendranagar, Hyderabad during late rabi 2020-21. The seasonal incidence of whorl maggot was noticed from7^thstandard week (3^rd week of February) and reached its peak activity during 10^th SW (2^nd week of March). The incidence of yellow stem borer was noticed during 7^th SW and reached itspeak during 9^th standard week and the highest per cent 27.59% of white ears were recorded during 14^th SW (1^st week of April). The initial 15 days of vegetative stage after transplantation the incidence of leaf folder was not observed. From 8^th SW (21 DAT) the incidence of leaf folder larvae was observed. The incidence of leaf folder was highest during 11^th SW (11.44%). The correlation studies revealed that per cent leaf damage by whorl maggot showed negative significant correlation with minimum temperature (r = -0.653*), RH-II (r = -0.849**). Whereas minimum temperature (r = 0.821**) showed significant positive correlation with the incidence of yellow stem borer. Furtherin case of leaf folder incidence, RH-II (r = -0.693*) showed significant negative correlation.