Relative susceptibility of different wheat varieties against rice weevil, Sitophilus oryzae (Linn.)
MK Yadav, MC Bhargava, MD Choudhary and Suman Choudhary
The present experiment was conducted using ten different wheat varieties to determine their susceptibility to Sitophilus oryzae (L.) at S.K.N. College of Agriculture, Jobner during 2015 and 2016. The experiment was laid out in Completely Randomized Design (CRD) with three replications in a control temperature of 27+2 0C and 70+5 percent relative humidity. Twenty five newly hatched larvae were introduced in each jar (6x9 cm) containing 100 g of grains. Results were evaluated on the basis of percent Adult emergence, Longevity of adult and Growth index. None of the wheat varieties were found resistant to the test insect. However, on the basis of different parameters, comparatively Raj-4037, Raj-3765 and Raj-4083 were found less susceptible while Raj-Molyarodhak-1, Raj-4238, Raj-4079 and Raj-4120 were moderately susceptible, whereas, Raj-1482, Raj-3077 and Raj-3777 were among the most susceptible varieties.