Toxicity was determined for 15 acaricides against a laboratory strain of northern fowl mites, Ornithonyssus sylviarum (Canestrini and Fanzago). Adult females were exposed to residues on filter paper for 24 h. Three organophosphorous compounds (monocrotophos, cythioate, and famphur) were more toxic to the northern fowl mite than was carbaryl, the most commonly used pesticide in the poultry industry. The other tested compounds were less toxic to the mite than was carbaryl. Four of these, not used previously for northern fowl mite control, had low LC50's for northern fowl mites:aldicarb (0.46); pirimiphos-methyl (0.73); exo, exo-2,8-dichloro-4-thiatricyclo[3.2.1.0.]octane-4-oxide (AI3-63182) (0.87); and diazinon (2.48).
Title: Systemic activity of coumaphos, famphur, crufomate, ronnel, and phosmet given orally to hens for control of the northern fowl mite, Ornitbonyssus sulviarum (Canestrini and Fanzago) DeVaney JA, Ivie GW Ref: Poult Sci, 59:1208, 1980 : PubMed
Coumaphos (O-(3-chloro-4-methyl-2-oxo-2H-1-benzopyran-7-yl)O,O-diethyl phosphorothioate), famphur (O-[p-(dimethylsulfamoyl)phenyl] O,O-dimethyl phosphorothioate). crufomate (4-tert-butyl-2-chlorophenyl methyl methylphosphoramidate), ronnel (O,O-dimethyl O-(2,4,5-trichlorophenyl) phosphorothioate) and phosmet (O,O-dimethyl phosphorodithioate S-ester with N-(mercaptomethyl) phthalimide) were administered as systemic acaricides (either single or multiple oral doses or as feed additives) for control of the nortnern fowl mite, Ornithonyssus sylviarum (Canestrini and Fanzago), on caged White Leghorn hens. None of the treatments controlled the mites, but some hens were poisoned.
