• Korean journal of applied entomology
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• v.43 no.1
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• pp.71-79
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• 2004

Toxicities of 42 pesticides (13 acaricides, 13 insecticides, 13 fungicides and 3 adjuvants) commonly used to control rose insect, mite, and disease pests were evaluated to the two-spotted spider mite, Tetranychus urticae egg and adult, and its predator Phytoseiulus persimilis egg, nymph and adult at the recommended concentration. The effect of density suppression of T urticae by predatory mite and pesticide mixture on the rose in the greenhouses was also investigated. Among 13 acaricides tested, acequinocyl, bifenazate, fenbutatin oxide and spirodiclofen showed much less toxicity to P. persimilis than to T urticae. Among insecticides, acetamiprid, imidacloprid, spinosad, thiamethoxam and acetamiprid＋etofenprox showed low toxicity to P. persimilis. and T ruticae. Among 13 fungicides, azoxystrobin, kresoxim-methyl, myclobutanil, nuarimol, triadimefon, triflumizole and oxadixyl＋mancozeb had a negligible effect on P. persimilis and T. urticae. Among three adjuvants, cover and siloxane expressed high toxicity, while spreader showed very low toxicity to P. Persimilis. In the greenhouses experiments, the density of T urticae before treatment was 65.3 mites per leaf. However, their density after release about 30 predatory mites per rose abruptly decreased from 3.8 mites at 11th day to zero mite at 20th day. During survey periods, four treatments of fungicides (kresoxim-methyl, myclobutanil, nuarimol, triflumizole) for the control of Sphaerotheca pannosa and one treatment of insecticide (spinosad) the control of Frankliniella occidentalis were applied, and these treatments had no the pesticides had no effect on the predatory mite density. It may be suggested from these results that four acaricides, five insecticides, seven fungicides, and one adjuvant could be incorporated into the integrated T. urticae management system with P. persimilis on rose cultivation.

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2004.05a
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• pp.90-90
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• 2004

• Proceedings of the Korean Society of Applied Entomolohy Conference
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• 2002.11a
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• pp.76-76
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• 2002

• Korean Journal of Organic Agriculture
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• v.14 no.3
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• pp.315-323
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• 2006

The potential of the predatory mite Phytoseiulus persimilis (Acarina : Phytoseiidae) to control two spotted spider mite Tetranychus urticae (Acarina : Tetranychidae) was investigated on sustainable strawberry fields in Jeonnam area. The density of T. urticae increased from 4th and 7th weeks after single and two timings release P. persimilis, respectively. On the three timings of release plot, number(density) of T. urticae on a leaf maintained fewer than 10 during the 15 weeks after release. In the 1,000 release of P. persimilis per $100m^2$ plot, P. persimilis could not suppress T. urticae. In the 2,000 release plot, P. persimilis could suppress T. urticae with low density which was the similar in the 3,000 release plot. Two-spotted spider mite, T. urticae, occurred from late March and increased density in Hampyeong area. In the P. persimilis released field, T. urticae inhibited continuously after release. In Boseong area, density of P. persimilis increased 50 per 10 leaves through increasing of T. urticae. Percent of occurrence of T. urticae showed high $10.5{\sim}75.5%$ in none-release predatory mite but not high in release treatment. T. urticae on sustainable strawberry field could be inhibited by P. persimilis.

• Journal of Mushroom
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• v.15 no.4
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• pp.254-258
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• 2017

Mushroom mites have recently caused severe damage to sawdust beds, mushroom mycelia, and fruiting bodies; therefore, they have reduced the production of the button mushroom, Agaricus bisporus, in greenhouses. There are currently no registered pesticides for mushroom mites. It is necessary to selectively control mushroom flies and mites without affecting the growth of the mushroom. We examined biological control of mushroom mites using predatory mite Stratiolaelaps scimitus in button mushroom cultivation. As a result, a three times treatment (1 treatment after water cleaning, 1 treatment after fungus inoculation, and 1 treatment before or after casing) was most effective at controlling mushroom mites, with 3.000 predatory mites (3 bottles) scattered evenly over $165-230m^2$ every 1-2 m. Predatory mite Stratiolaelaps scimitus could control mushroom flies and mites at the same time and could be used at any time during cultivation.

• Korean Journal of Organic Agriculture
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• v.24 no.4
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• pp.881-891
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• 2016

The susceptibility of the predatory mite, Neoseiulus californicus to extracts of Melia azedarach, Piper nigrum, Syringa velutina and their mixtures was evaluated in laboratory bioassays. In treatments with plant extracts tested, 76-86% of adult female predators survived after 7 days after treatment. Adult female predators treated with plant extracts tested produced 68.3-81.1% as many eggs as did control females and eclosion of eggs deposited by treated predators was not affected. Moreover, treatment of plant extracts tested showed no toxic effect on N. californicus eggs and produced 100% hatchability. Survival of N. californicus nymphs was not seriously affected by exposure to the plant extracts tested. Immatures of N. californicus survived on the leaf disc treated with plant extracts tested and 78-90% of immature predators reached adulthood. These results suggest that extracts of Melia azedarach, Piper nigrum, Syringa velutina and their mixtures expected to be promising candidates for use in integrated mite management program with N. californicus.

• The Korean Journal of Pesticide Science
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• v.19 no.4
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• pp.418-423
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• 2015

Effects of 9 acaricides to the predatory mite, Neoseiulus californicus were evaluated. Seven of the acaricides tested, cyenopyrafen. spirodiclofen, spiromesifen, acequinocyl, bifenazate, flufenoxuron and cyflumetofen exhibited low toxicity to adult females and nymphs of N. californicus and had little effect on the reproduction and eclosion of eggs deposited by treated predators. Moreover, hatch percentage of N. californicus eggs was unaffected by exposure to these seven acaricides. Etoxazole did not significantly affect the survival and reproduction of adult female predators but caused very low eclosion in eggs laid by treated females and high egg mortality. Pyraclofos was extremely toxic to adult female predators and caused 100% mortality. Adult female predators survived on a diet of spider mites treated with cyenopyrafen. spirodiclofen, spiromesifen, acequinocyl, bifenazate, flufenoxuron and cyflumetofen and their fecundity was not substantially affected. Based on the results, cyenopyrafen. spirodiclofen, spiromesifen, acequinocyl, bifenazate, flufenoxuron and cyflumetofen are appeared to be promising candidates for use in integrated mite management program where N. californicus is the major natural enemy.

• Korean journal of applied entomology
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• v.57 no.4
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• pp.253-260
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• 2018

A mass-rearing method for a soil-dwelling predatory mite Stratiolaelaps scimitus (Womersley) was developed using the double box system. The rearing box consists of two, outer (22 L, $54{\times}36{\times}18cm^3$) and inner (6.5 L, $31{\times}22{\times}11cm^3$), plastic boxes. Inner box was filled with chaff (rice husks) which is used as the shelter of the predatory mites. Outer box contained 1 L of water and the inner box, then covered with a lid. This system prevents the predatory mites from escaping as well as keeping moisture of the shelter. In addition, Tyrophagus putrescentiae (Schrank), as prey mites of S. scimitus, was reared on the rice bran as a food source using the same double box system. The both mites were reared at $25{\pm}1^{\circ}C$, $60{\pm}10%$ relative humidity condition. The prey mites were provided once a week. The density of predatory mites increased three times for four weeks and the final population was approximately 120,000 individuals/box (4 L). This is a simple mass-raring technique of S. scimitus and helpful for the biological control of soil pests.

• The Korean Journal of Pesticide Science
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• v.20 no.1
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• pp.66-71
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• 2016

Susceptibility of the predatory mite, Phytoseiulus persimilis to 8 insecticides was evaluated. In treatments with insecticides tested, 78-92% of adult female predators survived after 168 hrs after treatment. Adult female predators treated with insecticides tested produced 62.6-93.4% as many eggs as did control females and eclosion of eggs deposited by treated predators was not affected. Moreover, hatch percentage of P. persimilis eggs and survival of nymphs were not seriously affected by exposure to the insecticides tested. Immatures of P. persimilis survived on the leaf disc treated with insecticides tested and 98-100% of immature predators reached adulthood. Based on the results, insecticides tested are expected to be promising candidates for use in integrated pest management program with P. persimilis.

• The Korean Journal of Pesticide Science
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• v.8 no.1
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• pp.54-62
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• 2004

The selective toxicity of spirodiclofen and fluacrypyrim+tetradifon to the predatory mite, Phytoseiulus persimilis and the tea red spider mite, Tetranychus kanzawai was evaluated. The bean leaf discs with adult females or eggs of both species were sprayed with several concentrations of spirodiclofen or fluacrypyrim+tetradifon. Spirodiclofen and fluacrypyrim+tetradifon were much less toxic to P. persimilis than to T. kanzawai. Although the survival rate of adult females of P. persimilis tended to decrease with increasing concentrations of spirodiclofen, 92-68% of predators survived at concentrations of 22.5-180 ppm. Likewise, reproduction was reduced with increasing spirodiclofen concentration. Spirodiclofen did not affect the hatch of P. persimilis eggs. Survival of immature predators decreased with increasing spirodiclofen concentration, however, 88-20% of immature predators reached adulthood at 22.5-90 ppm. In the case of fluacrypyrim+tetradifon, the survival rate of adult females of P. persimilis tended to decrease with increasing concentrations of fluacrypyrim+tetradifon. However, 94-72% of predators remained alive at concentrations of 22.5-180 ppm. Likewise, reproduction was reduced with increasing fluacrypyrim+tetradifon concentration. Fluracypyrim+tetradifon did not affect the hatch of P. persimilis eggs. Survival of immature predators decreased with increasing fluacrypyrim+tetradifon concentration, however, 100-86% of immature predators reached adulthood at 22.5-180 ppm. Based on the results, spirodiclofen and fluacrypyrim+tetradifon appeared to be promising candidates for use in integrated mite management programs where P. persimilis is the major natural enemy.