Evaluate the susceptibility of some store rice varieties to the infestation of red flour beetle Tribolium castaneum

Abstract

Study susceptibility of four rice varieties IRRI-06, IRRI-09, Kernel Basmati and Super Basmati by the infestation of red flour beetle and egg fecundity of red flour beetle carried out in laboratory from March 2016 to December 2016 at 15-35±1°C temperature and relative humidly 20-65±5%. Maximum fecundity of eggs 70.45% and weight loss 71.00gm were recorded on IRRI-6 variety. The minimum fecundity 28.84% and weight loss 34gm were observed on IRRI-09 Varity. Highest weight loss and egg fecundity was observed in the month of October while lowest during December and June. IRRI-6 variety was found susceptible while IRRI-09 found resistant. The other two varieties Super basmati and kernel basmati found less susceptible. Temperature below 25°C and humidity below 40% were negatively correlated while temperature between 30-35°C and Humidity 50-65% positively correlated with fecundity and weight loss.