Abstract
In the tobacco-growing seasons of 1962, 1963, and 1964, tobacco was treated with systemic insecticides to control green peach aphid, Myzus persicae (Sulzer), with 4 techniques for application: broadcast prior to planting, side dressing, foliar sprays, and transplant water applications. In 1962 results were not conclusive, except that Bayer 25141 ( O, O -diethyl O-p- (methylsulfinyl) phenyl phosphorothioate) and dimetilan, when included in the transplant water, were phytotoxic. In 1963, aphid infestation was light, but there were obvious reductions of aphid infestations attributable to sidedress treatment with disulfoton, Zinophos ( O, O -diethyl O -2-pyrazinyl phosphorothioate), AC 47470 (2-(diethoxyphosphinylmino)-4-methyl-1,3-dithiolane), and AC 47031 (2-(diethoxyphosphinylimino)-1,3-dithiolane). In 1964, aphid infestations were higher and injury greater than in 1963. Side-dress treatments by phorate, Zinophos, Niagara 10242 (2,3-dihydro-2,2-dimethyl-7-benzo-furanyl methylcarbamate), AC 47470, AC 47031, and disulfoton resulted in aphid control and significant increases in yields. AG 47470 was effective also when broadcast on the soil prior to planting.
Published Version
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