Depth of infestation by the Angoumois grain moth, Sitotroga cerealella (ver) into the different layers of both resistant and susceptible varieties of paddy, sorghum and cumbu was studied in laboratory using mylar film cylinders. Hundred eggs in a strip of cloth were placed at top of each column of grain and infestation was sustained for 10 weeks. Depth of infestation was more in susceptible varieties of paddy (10 cm), sorghum (7 cm) and cumbu (5 cm), which was 3 cm, 2 cm and 1 cm more than that was observed in the resistant variety of respective grains.
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Tamil Nadu Agricultural University
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Tamil Nadu, India.
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