Wheat Grain Variability to Infestation by Khapra Beetle, Trogoderma granarium Everts

Twenty-eight wheat cultivars were screened for their grain resistance and associated characters against khapra beetle, Trogoderma granarium through no choice progeny test conducted under uniform condition of temperature, R.H. and grain moisture. Mean number of progeny beetles obtained from different varieties/20 grains ranged from 10.0 to 36.9. Kalyansona, HS 240, WTN 50 and VAS 2023 occupied the resistant group. Cultivars MACS 2846, Sonalika, Raj 6062, DT 46 and GW 1188 were graded as the most susceptible group. Correlation studies between various grain characteristics and progeny beetle emergence revealed that grain size and hardness played a role in resistance and susceptibility of wheat grain against khapra beetle. The maximum % loss in weight was recorded in MACS 2846 (63.6) and minimum in Kalyansona (19.6).