Abstract
Experiments were con-ducted to evaluate the effectiveness of several organophosphorus and carbamate insecticides applied as preplanting soil treatments in controlling the tobacco flea beetle, Epitrix hirtipennis (Melsheimer), and the green peach aphid, Myzus persicae (Sulzer), on hue-cured tobacco. Phorate and American Cyanamid 43064 (cyclic ethylene (diethoxyphos-phinothioyl) dithioimidocarbonate) were the most promising of the materials used in reducing population of the tobacco flea beetle. Phorate and Bayer 37289 (O-ethyl O-2,4,5-trichlorophenyl ethylphosphonothioate) were effective in reducing the emergence of the insect from the soil. Phorate, American Cyanamid 43064, and Isolan (1-isopropyl-3-methyl-5-pyrazolyl dimethylcarbamate) prevented a buildup of the green peach aphid.

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