Appraisal of different wheat genotypes against angoumois grain moth,Sitotroga cerealella (Oliv.)

Wheat is one of the most important cultivated crops in all almost all countries of the world. hybrids have significantly increased the productivity and quality of this major crop. the aim of this study was to evaluate wheat genotype resistance to angoumois grain moth,sitotroga cerealella (oliv.) (lepidoptera: gelechiidac). twelve wheat genotypes were tested against sitotroga cerealella at 28±2°c,relative humidity 65+5% and photoperiod l: d 12: 12 hours in the laboratory. the results,evaluated on the basis of percent weight loss,damage,grain size and chemical composition of the grains,revealed that none of the genotypes was completely resistant to the infestation by this pest. however,their response varied significantly. genotype ibw -97103 (weight loss,12.19%) had significant resistance followed by ibw-97083 (17.43%),bakhtawar-92 (19.48%),f-sarhad (19.66%),ibw-97406 (27.19%),ibw-97114 (27.32%),ibw-97259 (29.40%),ibw-97110 (29.70%),ibw-96405 (30.94%),ibw-97366 (31.02%),ibw-97112 (36.14%) and ws-94194 (40.93%). the coefficient of correlation between percent weight loss and other parameters was significant,except for grain size. the coefficient of correlation between weight loss and chemical constituents was also significant,except for ash content. from the study it was concluded that prolonged storage of the most susceptible genotypes to s. cerealella should be avoided and the most resistant varieties,namely bw-97103< ibw-97083< bakhtawar-92,should be cultivated. copyright 2010 zoological society of pakistan.