Toxicity to Fly Larvae of Droppings from Chicks Reared on Insecticide-Treated Feed

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The toxicity to larvae of Musca domestica L., Fannia pusio (Wiedemann), Chrysomya megacephala (F.), and Parasarcophaga argyrostoma (Robineau-Desvoidy) of droppings from chicks administered 12 insecticides was determined. BidrinĀ® (3-hydroxy-N,N-dimethyl-cis-croton-amide dimethyl phosphate), N-2404 (O- (2-chloro-4-nitrophenyl) O-isopropyl ethylphosphonothioate), and N-2788 (O-ethyl S-p-tolyl ethylphosphonodithioate) were highly toxic to the larvae of the 4 fly species at concentrations in the feed between 50 and 100 ppm. At this concentration range, R-3413 (S- (4,6-dimethyl-2-pyrimidinyl) O,O-diethyl phosphorodithioate) was highly toxic to M. domestica, F. pusio, and C. megacephala while N-3051 (S-p-tert-butylphenyl O-ethyl ethylphosphonodithioate) was highly toxic to M. domestica and C. megacephala. Larval mortality was determined also in droppings inoculated directly with the insecticides. N-2404 was more toxic after passage through the chick than when directly inoculated into the droppings. CiodrinĀ® (α-methylbenzyl 3-hydroxycrotonate dimethyl phosphate) was less toxic to the larvae after passage through the chick.

Document Type: Research Article

Publication date: April 1, 1965

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