Abstract
THE observations reported herein were conducted to investigate the utility of some of the newer insecticides in the control of the common red mite of poultry (Dermanyssus gallinae) and of the northern fowl mite (Liponyssus sylvarium) Lethane A-70, hexachlorocyclohexane, and pentachlorophenol were selected for the tests.Lethane A-70, a powerful contact insecticide, when used as a dust was found by Alicata et al. (1946) to destroy all mites and lice upon poultry within 48 hours. Slade (1945) first reported the gamma isomer (gammexane) of hexachlorocyclohexane to be effective against the red mite of poultry. Telford (1947) and Steward (1947) have confirmed the observation. In laboratory experiments, Hixon and Muma (1947) regarded pentachlorophenol as superior to carbolineum in the control of the red mite. Field testing was not undertaken.Data regarding the control of the northern fowl mite are limited. Ritcher and Insko (1948), however, found 40 percent nicotine sulfate applied .
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