Evaluation for Resistance Against Khapra Beetle, Trogoderma granarium Everts in Stored Maize

Screening for grain resistance was undertaken using standard no choice progeny test. Different parameters viz., adult emergence, % weight loss and % kernel damage were taken as indicator for varietal resistance in 35 maize germplasms against khapra beetle, Trogoderma granarium. The least % loss in weight was recorded in Surya (5.3) followed by Dhawal (6.4) and Ageti-76 (11.8), while maximum % loss was recorded in Pusa Composite-1 (58.9) followed by ValUn (54.9) and Madhuri (54.8). Minimum mean number of progeny beetles were recorded in Win pop corn (5.7) followed by Dhawal (9.5), GM-1 (10.2), Kisan (16.2) and Surya (18). The size of grain was negatively correlated and highly significant with % weight loss and % grain damage. Positive correlation between emergence of progeny beetles with % weight loss and grain damage revealed that higher the adult emergence, the more was the weight loss.