Vol. 11, Special Issue 4 (2022)

Author(s):
R Sunitha Devi and NRG Varma

Abstract:
The experiment were conducted during kharif season of year 2013 & 2014 at Agricultural Research Station, Rajendranagar, Hyderabad, Telangana state, India to study the influence of weather parameters on the yellow stem borer catches of light trap, pheromone trap and field incidence. The results revealed that peak light trap catches (44 SW (179/week), 39 SW (152/week), pheromone trap catches (41 SW (8.8 male moths/trap, 44 SW (13.31 male moths/week/trap) and field incidence (43 SW (15.1%), 45 SW (10.5%) of yellow stem borer were recorded during kharif, 2013 and 2014, respectively. Correlations worked out between YSB population and weather parameters revealed that, one week lag minimum temperature (-0.60, -0.54 and -0.82), mean temperature -0.38,-0.37 and -0.66), afternoon relative humidity (-0.50,-0.53 and -0.43), Wind speed (-0.52, -0.39 and -0.53) showed significant negative correlation while one week lag sunshine hours (0.37 and 0.42) showed significant positive influence on light trap catches, pheromone trap catches and field incidence of yellow stem borer. The prediction model developed for the YSB population revealed that one week lag minimum temperature, mean temperature, afternoon relative humidity together explained the variation to an extent of 52 per cent in light trap catches, 53 per cent in pheromone trap catches and 70 per cent in field incidence of yellow stem borer.