Organophosphorus and Carbamate Insecticides as Substitutes for DDT in Controlling the Tobacco Flea Beetle on Flue-Cured Tobacco1

Abstract

Field experiments conducted in North Carolina during 1961-65 to compare the residual effectiveness of insecticidal sprays against Epitrix hirtipennis (Melsheimer) on flue-cured tobacco showed that, for the number of days indicated after application, the following treatments provided control similar to that obtained with 1 lb per acre of DDT: (1) for 10 days. 0.5 lb of carbofuran, Dasanit®( O, O -dicthyl O -[ P -(methylsulfinyl) phenyl] phosphorotluoate), dinwthoate. Gardona® (2-chloro-1-(2-4,5-trichlorophenyl) vinyl dimethyl phosphate), Imidan® ( O, O- dimethyl S-phthalimidornethyl phosphorodithioate), and Supracide® (S-((2-methoxy-5-oxo-∆2-1,3,4-thiadiazolin-4-yl) methyl) O, O -dimethyl phosphorodithioate), and 1 lb of aminocarb and MCA-600 (benzo[b]thien-4-yl methylcarbamate), (2) for 6 days, 0.25 lb of azinphosmethyl. 0.5 lb of dicrotophos and phosphamidon, and 1 lb of carbaryl, and (3) for 3 days, 0.25 lb of parathion and 1 lb of carbanolate. One-fourth lb of methyl parathion, 0.5 lb of diazinon, endosulfan, malathion, and naled, and 1 lb of TDE provided control inferior to that of 1 lb of DDT for 3 days and no significant control thereafter. Variable control was obtained with monocrotophos.