• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2004.05a
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• pp.91-91
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• 2004

• The Korean Journal of Pesticide Science
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• v.3 no.2
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• pp.69-73
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• 1999

The insecticidal activities and residues of chlorfenapyr [4-bromo-2-(4-chlorophenyl)-1-ethoxymethyl-5-trifluorornethyl pyrrole-3-carbonitrile] against Thrips palmi was evaluated under laboratory and vinyl house conditions. Effectiveness of chlorfenapyr against T. palmi on red pepper leaves was lasted for 9 days at a concentration of 50 ppm but there was no significant differences between emulsifiable concentration and wettable granule under laboratory conditions. In vinyl house, high toxicity was investigated at 6 hours after application of chlorfenapyr in a concentration of 50 and 100 ppm and insecticidal effect was maintained for 11days after 2 times weekly application in cucumber. Control effect was above 97% against T. palmi larva and larva+adults after 2 times weekly application in vinyl house.

• Korean Journal of Environmental Biology
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• v.35 no.4
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• pp.557-565
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• 2017

For our survey of insecticidal resistance of Palm thrips (Thrips palmi Karny), we established the discriminating time (DT) and concentration (DC) of nine insecticides, and we conducted a bioassay about seven local populations via leaf-dipping methods. The discriminating times of the recommended concentration (RC) were 24 h at emamectin benzoate EC and spinetoram SC, 48 h at chlorfenapyr EC, 72 h at spinosad SC, cyantraniliprole EC, acetamiprid WP, dinotefuran WG, imidacloprid WP and thiacloprid SC after treatment. The DC estimated the concentration which showed the difference within the mortalities of these local populations. The DCs were emamectin benzoate EC $0.013mg\;L^{-1}$ (RC, $10.8mg\;L^{-1}$), spinetoram SC $0.125mg\;L^{-1}$ (RC, $25.0mg\;L^{-1}$), chlorfenapyr EC $0.25mg\;L^{-1}$ (RC, $50.0mg\;L^{-1}$), spinosad SC $0.083mg\;L^{-1}$ (RC, $50.0mg\;L^{-1}$) and cyantraniliprole EC $5.0mg\;L^{-1}$ (RC, $50.0mg\;L^{-1}$), and DCs of neonicotinoids were their RCs, that is, acetamiprid WP (RC, $40.0mg\;L^{-1}$), dinotefuran WG (RC, $20.0mg\;L^{-1}$), imidacloprid WP(RC, $50.0mg\;L^{-1}$) and thiacloprid SC (RC, $50.0mg\;L^{-1}$). From our investigation into the resistance of the local populations with DT and DC application, the neonicotinoid insecticides have shown a high resistant level for all the local populations, and the other insecticides have demonstrated low or non-resistance. In the use of neonicotinoid insecticides to control Palm thrips, one must take caution. As a result, the establishment of DT and DC in the single dose bioassay method was helpful for surveying the insecticide response dynamics and the development of an insecticide resistance management strategy.