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- W2364705769 abstract "Thirteen insecticides including pyrethroids, organophosphates, microbial preparation and their mixture were tested for their contact toxicity to three species of hymenopterous parasi-toid adults in the laboratory. It is found that the rate of knock-down by pyrethroids to Ptero-malus puparum from Pieris rapae is more rapid than organophosphates in general though the former have lower toxicity than the latter. In the pyrethroids- permethrin and cypermethrin display higher toxicity than fenvalerate and 3-phenoxybenzyl-(4-chlorophenyl) iso-valerate. Dimethoate, omethoate, methamidophos, malathion, trichlorphon, triazophos, and Liuyangmycin plus dimethoate are more toxic to both P. puparum and Apameles glomeratus while trichlorphon and acephate are less toxic than other organophosphates tested. The microbial preparation Liuyangmycin. derived from a soil microorganism has no toxicity to P. puparum per se, but its combination with dimethoate would display higher toxicity to the parasitoids when the latter used alone. Although the knock-down rate of fenvalerate. to A. glomeratus is more rapid than triazophos, fenvalerate has lower toxicity. The toxicity of fenvalerate and 3-phenoxy-benzyl-(4-chlorophenyl) iso-valerate to Tetrastichus sp. is lower than triazophos. To sum up, the order of toxicity to P. puparum at 4.35×10-4mg/cm2 under the experimental conditions is: omethoate malachion ≈methamidophos trichlorphon≈ acephate cypermethrin ≈ permethrin 3-phenoxybenzyl-(4-chlorophenyl) iso-valerate; the order of knock-down rate is: malathion cypermethrin permethrin 3-phenoxybenzyl-(4-chlrophenyl) iso-valerate trichlorphon ≈ome-thoate methamidophos acephate. It is noted that some prostrate parasitoids from contact with pyrethoids could revive. The potential use of the insecticides in integrated pest management is discussed." @default.
- W2364705769 created "2016-06-24" @default.
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- W2364705769 date "1988-01-01" @default.
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- W2364705769 title "CONTACT TOXICITY OF SOME INSECTICIDES TO CERTAIN HYMENOPTEROUS PARASITOIDS" @default.
- W2364705769 hasPublicationYear "1988" @default.
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