Effect of Surface on Residual Activity of Selected Compounds

Twenty-two compounds were tested as residual deposits against Musca domestica L. and Blattella germanica (L.) on painted and unpainted galvanized metal, tempered masonite, and asphalt tile surfaces. The applications were made at 50, 100, and 200 mg per square foot except for ronnel and dimethoate. Dimethoate was the most effective compound against M. domestica when all 4 surfaces are considered. On the individual surfaces dimethoate was most effective on painted metal, Hercules 9699 [O-(2-propynyl-oxy) phenyl methylcarbamate] on unpainted metal and tempered masonite and Bayer 37344 [4-(methylthio)-3,5 xylyl methylcarbamate] on asphalt tile. Hercules 9699 was the most effective toxicant against B. germanica on all 4 surfaces. On the individual surfaces Baygon® (o-isopropox-phenyl methylcarbamate), was most effective on painted metal, Hercules 9699 on unpainted metal, Bayer 46676 (O-ethyl O-[2- (ethylthio)-6-methyl-4-pyrimidinyl] ethyl-phosphonothioate) on tempered masonite and Hercules 9699 on asphalt tile.