Screening of Maize Germplasms against Trogoderma granarium (Everts)

Different parameters viz. adult emergence (%), weight loss (%), kernel damage were taken as indicator for varietal resistance in 30 maize germplasms against Trogoderma granarium. The least % loss in weight was in Varun (5.5) followed by Sheetal (6.9), GM-4 l (9.5), HQPM-2 (10.46), JM-12 (11.25) and HQPM-1 (11.51), while maximum % loss was recorded in Madhuri (43.7), Bio-9681 (28.7), CM-500 (23.9), HM-1 (22.2), HHM-6 (20.1) and GM-1 (19.8). Maximum mean number of progeny were recorded in Madhuri (6.4) followed by Gujrat Sweet Corn (5.9), Bio-9681 (5.2), CM-50 (4.9) and minimum mean number of progeny were recorded in Varun (1.4) followed by Sheetal (1.5). HQPM-1 (1.8) Win pop corn (1.9) and Amber pop corn (1.9). The size of grain was negatively correlated and highly significant with % weight loss and % grains damage. Positive correlation between emergence of progeny beetles with % weight loss and grain damage revealed that higher adult emergence caused more weight less.