• Korean journal of applied entomology
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• v.48 no.3
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• pp.347-354
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• 2009

This study was conducted on the biological control effects of the natural enemy, Amblyseius cucumeris, against Polyphagotarsonemus latus. The broad mite moved to a new habitat after the carrying capacity of the preferred habitat on the upper leaf has been reached. Population dynamics between predator, Amblyseius cucumeris, and prey, P. latus, were quite well synchronized since the predator followed the movement of the prey. In predation test by Amblyseius cucumeris on P. latus, A. cucumeris fed on 8.8, 15.2, 27.0 and 30.3 individuals/day under the temperatures of 15, 20, 25, and $30^{\circ}C$, respectively. The A. cucumeris larva, protonymph, deutonymph, adult male, and adult female fed on 0.5, 1.6, 5.2, 3.8, and 27 individuals of adult P. latus per day, respectively, under $25^{\circ}C$ condition. The functional response curve of adult P. latus to the densities of A. cucumeris showed Holling's Type II curve. The consumption of prey by A. cucumeris increased with the prey density increase, but the consumption rate decreased. The critical ratio of predator vs. prey effectively to suppress (98% over) the population of P. latus by releasing A. cucumeris was 1:40 on red pepper.

• The Korean Journal of Pesticide Science
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• v.7 no.4
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• pp.296-301
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• 2003

This study was conducted to select low toxic insecticides against natural enemies, and to evaluate resistance stability and cross-resistance to resistance strain for the fulfillment of integrated pest management development. Toxicity of imidacloprid and spinosad to Amblyseius cucumeris was relatively low regardless of the adopting test methods. In addition, those to the Amblyseius fallacis was also low by slide dipping method. The slide dipping method was useful to eliminate repellency effect by mites to the tested insecticides. Mortality of A. fallacis to deltamethrin recorded in 1994 and 1999 was 21.6% and 7.4%, respectively. Meanwhile, the permethrin-resistanct strain of A. fallacis was maintained its resistance to deltamethrin. However, the cross-resistance to the newly introduced insecticides namely imidacloprid, fipronil, chlorfenapyr, abamectin, and spinosad. was relatively low.

• Korean journal of applied entomology
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• v.45 no.1 s.142
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• pp.1-7
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• 2006

Effectiveness of Orius strigicollis (Poppius) and Amblyseius cucumeris (Oudemans) as natural enemies against thrips were evaluated on greenhouse green pepper, sweet pepper and cucumber respectively. Control efficacy was calculated by the formula, $(D_{control}-D_{treatment})/D_{control}{\times}100$, where $D_{control}$ is the average density of thrips on the plots in which any natural enemy was not released and $D_{treatment}$ is the average density of thrips on the plots in which natural enemies were released respectively. As a result, control efficacies of O. strigicollis against Frankliniella occidentalis (Pergande) on green pepper and sweet pepper were $14.3{\sim}99.5%$ and $21.6{\sim}98.3%$, respectively. In addition, control efficacy of it against Thrips palmi Kany on cucumber was 61.2-74.4%. Control efficacies of A. cucumeris against F. occidentalis on green pepper and sweet pepper were $12.9{\sim}38.3%$ and $17.1{\sim}87.0%$, respectively. Control efficacy of it against T. palmi on cucumber was $90.4{\sim}97.4%$. Field evaluation showed that the prompt applications of natural enemies were effective to reduce the density of thrips. In detail, to control F. occidentalis effectively on green pepper and sweet pepper in spring season, five to six individuals of O. strigicollis per crops should be released three to six times continuously. To control T. palmi effectively on cucumber in autumn, more than 100 individuals of A. cucumeris per crop should be released four times repeatedly.

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2002.05a
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• pp.200-200
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• 2002

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2003.10a
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• pp.148-148
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• 2003

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2004.05a
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• pp.177-177
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• 2004

• Korean journal of applied entomology
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• v.47 no.4
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• pp.429-433
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• 2008

On the leaf disc of fruit vegetables (cucumber, sweet pepper, tomato, egg plant, oriental melon), it has been evaluated that the capability of four predatory mites (Amblyseius swirskii Athias-Henriot, Neoseiulus barkeri (Hughes), N. cucumeris (Oudemans), N. californicus (McGregor)) to prey on the eggs of Bemisia tabaci (Gennadius) and to lay own eggs. The most aggressive mite was A. swirskii which had consumed about $9{\sim}12$ eggs in a day. The quantity of eggs consumed by N. barkeri, N. cucumeris and N. californicus was about $6{\sim}9,\;4{\sim}6$ and $1{\sim}4$, respectively. The most productive mite was also A. swirskii which had laid about $1.2{\sim}1.9$ eggs in a day. The others could not lay more than 0.5 eggs in a day.

• Korean Journal of Organic Agriculture
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• v.18 no.4
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• pp.559-571
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• 2010

This study carried out to evaluate toxicology of Chrysanthemum cinerariaefolium and Melia azedarach against natural enemies in the laboratory, and the diamond backmoth, Plutella xylostella, on chinese cabbage. In the evaluation of the toxicity on predatory mite of phytoseiid Phytoseiulus persimilis, Hypoaspis aculeifer, Amblyseius cucumeris, A. wormersleyi, A. swirskii, the two plant extracts were classified into moderate selective toxicity as recommended by international organization of biocontrol (IOBC). The mummies parasitic natural enemies, Trichogramma evanescens, Aphidius ervi, Aphidius colemani, Eretmocerus eremicus, Encarsia formosa were found to be relatively safe to the plant extracts except Eretemocerus eremicus. In the field study for the control of diamondback moth, Plutella xylostella, single spray of C. cinerariefolium indicated that the control effect dropped from 21th days after the spraying. In the 3 times of spray with 7 says intervals, the mortality effect low at the beginning, but increased to 91.1 at 21 days after spraying. Single spray of M. azedarach showed a 96.7% mortality on P. xylostella at 14 days after spraying, and thereafter decreased. In the three times of spray with 7 days intervals of M. azedarach, the mortality of P. xylostella was 100% at 14 days and its effect was maintained to 28 days after treatment. Consequently, it was suggested that M. azedarach be sprayed before C. cinerariaefolium application.