Resistance of Sorghum to stem borers.It was notied from field tests that the extent of infestation by stem borers in Sorghum varies with varieties.The results obtained under controlled conditions would appear to show that the host selection of moths is one of the causes of the phenomenon There has been observed a significant association between infestation and heigh of plants which may be explained by the assumption that all plants present more space to the borers attacks than the short and dwarf plants.With a large number of grain colours present in sorghums, white grain varieties have sown comparatively less infestation by borers than varieties with other grain colours.Under controlled conditions 'sorgos'as a group were more susceptible to the attack than the nansaocharine varieties. (amer.Sci.Agronom.Vol.28.No.4.pp.271-278). K.R.
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