. . . . . . "Field life of Orthene, Sevin-4-oil, and Dylox 1.5 bioassay with Douglas-fir tussock moth larvae"@en . . . . . . . . . "Field life of Orthene, Sevin-4-oil and Dylox 1.5 Bioassay with Douglas-fir tussock moth larvae" . . . . . .