Experimental Insecticides Applied as Sprays to Control Thrips and the Cotton Fleahopper1234

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Abstract
In field experiments Bidrin® (3-hydroxy-N, N dimethyl-cis-crotonamide dimethyl phosphate), Shell SD-9129 (dimethyl phosphate ester with 3-hydroxy-N-methyl-cis-crotonamide), and Mobil MCA-600 (benzo[b] thien-4-yl methylcarbamate) compared favorably in control of thrips (Frankliniella sp.) with carbaryl. and American Cyanamid CL-47470 [cyclic propylene (diethoxyphosphinyl) dithioimidocarbonatc], CL-47031 [cyclic ethylene (diethoxyphosphinyl) dithioimidocarbonate[, and phosphamidon were as effective as toxaphene + DDT. Bidrin, Geigy GS-13005 [O, O-dimethyl phosphorodithioate S-cster with 4-(mer-captomethyl)-2-methoxy-△2-1,3,4-thiadiazolin-5-onc]. MCA-600. and SD-9129 gave control of the cotlon fleahopper. Psallus seriatus (Reuter), equal to that obtained with toxaphene + DDT. A comparison of visual plant terminal inspcction and a vacuum machine for sampling the cotton fleahopper population indicatcd that the visual method was the most efficicnt for sampling nymphs.

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