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History, evolution, and consequences of insecticide resistance☆☆☆
Much has been learned about the mechanisms of resistance and the genetic, biological, and operational parameters that enable pest populations to thwart man's best efforts at chemical control and the challenge is to utilize this knowledge in the development of management strategies that will suppress the eruption of multiresistance. Expand
Environmental impact of mosquito pesticides: Toxicity and anticholinesterase activity of chlorpyrifos to fish in a salt marsh habitat
Fish exposed to 4 successive field applications of chlorpyrifos granules showed AChE inhibition ranging from 56 to 100% and the insecticide effect was cumulative in nature, and fish mortality was less at lower concentration of the insecticides than at the higher levels. Expand
Laboratory and Field Evaluation of Piperonyl Butoxide as a Pyrethroid Synergist Against the Colorado Potato Beetle (Coleoptera: Chrysomelidae)
Laboratory and field studies showed that piperonyl butoxide synergizes both permethrin and fenvalerate against the Colorado potato beetle (CPB), Leptinotarsa decemlineata Say, which suggests a less developed mixed-function oxidase detoxication system in CPB larvae. Expand
Gypsy Moth Mixed-Function Oxidases: Gut Enzyme Levels Increased by Rearing on a Wheat Germ Diet
Fifth-instar gypsy moth, Lymantria dispar (L.), larvae reared on an artificial wheat germ diet show significantly ( P <0.001) higher mixed-function oxidase (MFO) activity than oak-reared larvae, asExpand
Nadph oxidation by microsomal preparations of gypsy moth larval tissues
The involvement of NADPH-cytochrome C-reductase in the electron transport chain in gypsy moth is indicated and the possibility of the presence of cytochrome P 450 is suggested. Expand
The identification and distribution of the carboxylic esterases in the American cockroach, Periplaneta americana (L.)
The largest number and the major concentration of the organophosphorus resistant esterases were found in the alimentary tract and the haemolymph, while the most abundant number and amount of the aliesterase were observed in the nerve cord, brain, fat body, and integument. Expand
NADPH-cytodhrome-c-reductase: changes in specific activity in gypsy moth larvae.
Abstract NADPH-cytochrome- c -reductase from guts of gypsy moth, Porthetria dispar , oxidized NADPH at the following rates: 11·6, 41·9, and 57·6 nmol/30 min per 0·6 mg protein, in the third, fourthExpand
Acrylamide gel electrophoresis of housefly esterases
The results show that esterase patterns varied considerably between strains and within strains; the esterases, except for one, acted as anions under these conditions; and no clear-cut, consistent differences were observed between resistant and susceptible flies. Expand
Hydroxylation and demethylation by gut microsomes of gypsy moth larvae
Biotransformations of certain aromatic xenobiotics by microsomes from the gut of gypsy moth Porthctria dispar L. larvae were studied, and at higher temperatures enzymic activity declined rapidly, probably through thermal deactivation. Expand