Abstract
Ephestia cautella (Walker) was reared on ten sorghum varieties at 30°C and 70 ± 5% r.h. Average developmental period, per cent adult emergence and dry weight of the adult insects was recorded on each variety. Significantly poor adult emergence was recorded on 77 K 1262, CSV-5 and IS 7002. Larvae developed quickly on Swarna, CSV-2, CSV-3, CSV-4 and Sel. 472 and slowly on IS 4776 and IS 7002. Using a computed growth index the varieties can be grouped into six different categories. Distance analysis and group constellation indicated six distinct clusters. Similar clustering was also observed through canonical variate analysis which matches with the clusters obtained from D 2 statistics. The contribution of different nutritional characters in creating diversity among sorghum varieties revealed that per cent survival contributed maximum towards the divergence of the varieties.
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