DDT Resistance in Heliothis zea12

Publisher Website
Google Scholar
Abstract
Laboratory tests with bollworms Heliothis zea (Boddie), collected in several areas of Texas in 1962 indicated populations in some areas were highly resistant to DDT. Bollworms from College station, La Grange, and Eagle Pass were 50 to 100 times harder to kill with DDT than those from El Paso and the Lower Valley. Also, bollworms collected from cotton were much harder to kill with DDT than those collected from corn in the same area. This indicates that possibly host-specific strains of bollworm exist and that transfer from corn to cotton in mid-season is slight or does not occur. Additional tests with tobacco budworms, II. virescens (F.), collected at College Station, La Grange, Angleton, Eagle Pass, and Ft. Stockton indicated that this cotton pest is almost immune to DDT. The insecticides tested whieh appeared to give satisfactory control of DDT-resistant bollworms and tobaceo budworms were endrin, carbaryl, toxaphene-DDT (2: 1) lind Strobane [terpene polychlorinates (65% chlorine)]-DDT (2: 1).

This publication has 1 reference indexed in Scilit: