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ISSN : 1226-9999(Print)
ISSN : 2287-7851(Online)
Korean Journal of Environmental Biology Vol.35 No.4 pp.557-565

Establishment of Discriminating Concentration based Assessment for Insecticide Resistance Monitoring of Palm thrips

Sung-Wook Jeon,Bueyong Park,Se-Keun Park,Sang-Ku Lee,Hyun-Ju Ryu,Sang-Bum Lee,In-Hong Jeong


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 0.013 mg L-1 (RC, 10.8 mg L-1), spinetoram SC 0.125 mg L-1 (RC, 25.0 mg L-1), chlorfenapyr EC 0.25 mg L-1 (RC, 50.0 mg L-1), spinosad SC 0.083 mg L-1 (RC, 50.0 mg L-1) and cyantraniliprole EC 5.0 mg L-1 (RC, 50.0 mg L-1), and DCs of neonicotinoids were their RCs, that is, acetamiprid WP (RC, 40.0 mg L-1), dinotefuran WG (RC, 20.0 mg L-1), imidacloprid WP (RC, 50.0 mg L-1) and thiacloprid SC (RC, 50.0 mg 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.

오이총채벌레의 약제 저항성 진단을 위한 판별농도 기반 생물검정법 확립