Abstract
A survey of wireworm resistance to cyclodiene insecticides on tobacco was made in 1962. It was shown that Conoderus vespertinus (F.) and C. falli Lane were both present in fields properly treated with insecticides. Larvae of the latter species were found in tobacco only in the southeastern section of North Carolina whereas C. vespertinus was present in all tobacco growing areas in the southern and eastern counties of the State. Field-screening tests on resistant populations showed that the following materials were promising as broadcast treatments: parathion, diazinon, Telodrin® (1, 3, 4, 5, 6, 7, 8, 8-octachloro-1, 3, 3a, 4, 7, 7a-hexahydro-4,7-methanoisobenzofuran), VC-13 Nemacide® ( O- 2, 4-dichlorophenyl O-O -diethyl phosphorothioate), Bayer 38156( O -ethyl S-p -toyl ethylphosphonodithioate), and Cynem® ( O, O -diethyl O -2-pyrazinyl phosphorothioate; also known as Zinophos or AC-18133). Transplanting water treatments of the following materials gave good results: diazinon, Bayer 38156, Bayer 25141 ( O, O -diethyl O-p -methylsulfinylphenyl phosphorothioate, UC-8305 ( p -chloro-5-methyl- p -thio-2,4,3-dioxaphosphabicyelo [4.4.0] decane), Stauffer N-2788 ( O -ethyl- S-p -tolyl ethylphosphonodithioate) same as Bayer 38156; and GC-4072 (diethyl-1-(2-4-dichlorophenyl)-2-chlorovinyl phosphate).
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