Abstract
Susceptibility of three species of bagworm larvae to several insecticide formulations was determined under laboratory conditions. Out of the test compounds chlorpyrifos-methyl and Salithion® (2-methoxy-4H-1,3,2-benzodioxaphosphorin 2-sulfide) emulsifiable concentrate formulations were found to be most toxic to three species of bagworms. There was a high correlation in species susceptibility to insecticide between Prodenia litura F. and Cryptothelea minuscula Butler and between Calospilos miranda Butler and C. minuscula. In field tests excellent control was obtained of C. minuscula infesting plum trees, Prunus mume Sieb. et Zucc., with chlorpyrifosmethyl and Salithion water emulsion sprays at an active ingredient concentration of 0.044 percent and 0.05 percent, respectively.
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