Abstract
The effects of various insecticides on the rice stem borer or paddy borer, Schoenobius incertulas Walker, were tested. The results of 4 years' work indicated that under conditions of heavy infestation two treatments at an interval of 15 to 20 days were adequate. Endrin and Telodrin® (l,3,4,5,6,7,8,8-octachloro-1,3,3a,4,7,7a-hexahydro-4,7-methanoisobenzofuran) were outstanding. Parathion and diazinon maintained good control. Dipterex® ( O,O -dimethyl-2,2,2-trichloro-l-hydroxyethyl phosphonate), thiometon ( S -2-ethylthioethyl- O,O -dimethyl phosphorodithioate), Rogor® (dimethoate), Phosdrin® [a mixture of the alpha isomer of 2-carbomethoxy-l-methylvinyl dimethyl phosphate (not less than 60%) and related compounds (not more than 40%)], DDT, and malathion were not effective in control of this borer. A brief discussion of the principles concerned in the control and the characteristic moth activity is given.
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