Bioefficacy of Certain Insecticides Against the Castor Capsule Borer (Dichocrocis Punctiferalis) Guenea
Field evaluation of certain insecticides against castor capsule borer (Dichocrocis punctiferalis Guenee) revealed that the lowest infestation was in plots sprayed with 0.04% monocrotophos followed by those applied with 1.5% quinalphos dust, and 1.5% chlorpyriphos dust which were on a par. The highest seed yield (2029 kgfha) was obtained with monocrotophos 0.04%, and next in order were methyl parathion 2% dust and chlorpyriphos 1.5% dust, these two being on a par. The mabximum economic advantage (NICBR) was recorded by 2% methyl parathion (1:4.8) followed by 0.04% monocrotophos (1:3) and 0.05% dichlorvos (1:2.8).