Host-plant resistance to sorghum stem borer

Sorghum is an important cereal crop in the semi-arid tropics. In India it is grown during the rainy (Kharif) and the post rainy (rabi) seasons Grain yields under farmers conditions are generally low (500-800kg ha-1)one of the reasons for low yields is crop damage by insect pest. Nearly 150 insects species have been reported on sorghum (young and teetes 1977 Seshureddy and Davies 1979 b)of which most widespread and economically important pests are shoot fly stem borers, army worm, midge, head bugs, and head caterpillar