Abstract
Abstract Light and pheromone trap-catches of yellow stem-borer (YSB) [Scirpophaga incertulas (Walker)] were monitored in low-land rice during summer 2017 in the Chhattisgarh, India region to develop biological control management strategies for areas with low winter temperatures. High catches of males and females in light trap started during March 05 to 11th, 2017, in association with 8.5% dead-heart symptom, indicative of YSB damage to the central shoot, which continued during May 14 to 20th, 2017 and, thereafter declined. Male moth catches in pheromone traps started during the same time as in light trap and peaked from May 07 to 13th, 2017. White ear, due to YSB causing empty panicles in the ear-bearing stage, appeared during April 23rd to 29th, 2017 and reached a peak of 22.8% during May 21st to 27th, 2017. Increase of temperature coupled with reduction of relative humidity and scanty rainfall were favourable to the multiplication of YSB and trap catches in summer rice.These data are helpful for planning biological control against YSB in rice during the Chhattisgarh summer.
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