This study was conducted to monitoring the insecticidal susceptibility of Western flower thrips, Frankliniella occidentalis,damaging the horticultural crops in Gyeonggi area. Neonicotinoid insecticides, especially acetamiprid SP, clothianidin SC,imidacloprid WP and thiacloprid WG were not toxic to F. occidentalis collected from horticultural crops. Excepting theinsecticide of spinosin or pyrrole class, there was a little class of insecticides for the effective control of F. occidentalisin horticultural crop areas. Considering all the results in this study, spinosin insecticides including over 4 and 10% ofspinetoram and spinosad, and pyrrole insecticide including over 5% of chlorfenapyr should be recommended for the effectivecontrol of F. occidentalis, damaging the horticultural crops in Gyeonggi area.

Insecticidal susceptibility of Western flower thrips, Frankliniella occidentalis, was investigated under laboratory and greenhouse conditions using commercial insecticides at their recommended concentrations. Neonicotinoid insecticides, especially acetamiprid SP, clothianidin SC, imidacloprid WP and thiacloprid WG were not toxic to F. occidentalis collected from horticultural crops. Excepting the insecticide of spinosin or pyrrole class, there was a little class of insecticides for the effective control of F. occidentalis in horticultural crop areas. Considering all the results in this study, spinosin insecticides including over 4 and 10% of spinetoram and spinosad, and pyrrole insecticide including over 5% of chlorfenapyr should be recommended for the effective control of F. occidentalis

This study was conducted to develop the biological insect pest control on pear orchard by using the native natural enemy from 2011 to 2013. We selected the green lacewing, Chrysoperla nipponensis (Okamoto) for useful natural enemy and developed the artificial mass rearing technique, and tested finally in pear orchard located in Anseong city. Nine species of insect pests including Pseudococcus comstocki on pear and seven species of natural enemies including C. nipponensis were investigated in Gyeonggi area. The optimum developmental temperature, humidity and photoperiod for C. nipponensis were 20 ∼25℃, 60∼70%, and 16L : 8D respectively. One C. nipponensis during larval stage could feed about 440 2nd nymphs of P. comstocki at 20℃. The more prey density increase, the more feeding amount C. nipponensis larva was increased. The eggs of almond moth, Ephestia cautella were useful as a substitute diet for natural enemy, C. nipponensis. Three commercial insecticides which registered as insecticide on pear shown the low toxicity to natural enemy, C. nipponensis will be suitable for integrated pest management (IPM) in pear orchards. C. nipponensis shown the about 80% of control value against the P. comstocki in field test when had committed from the early May to the early July. Controlling the P. comstocki by using of C. nipponensis, not only the 30% of yield was increased, but also the quality especially fruit sugar was increased.