Abstract:
Twenty four insecticides were evaluated against the caterpillars of
Cnaphalocrocis medinalis Guenee in the laboratory using a new laboratory
technique of spraying them within leaf folds under a Potter's Tower and in
field experiment in which the per cent reduction of larval population caused
by spraying was assessed. The results of the two experiments showed strict
correspondence. Ethyl parathion, carbaryl, carbophenothion, dimethoate, fenthion
fenitrothion and leptophos were found very effective against C. medinalis larvae
while phosphamidon, phorate, formothion, methyl demeton, quinalphos, monocrotophos,
thiometon and acephate, were moderately effective.
