• Korean journal of applied entomology
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• v.33 no.2
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• pp.107-113
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• 1994

This study is canled for tanonomical investigation of Olibatid mites on landscape plan& As the results, thirteen species of Oribatid mites on the plants are described for the first time from Korea. but the harmfulness caused by the mites is not yet proved The mites are Tuberemoeus singularis Sellnick, Zygoribatulo elongoto Hammer. Scahperemaeus yamashitoi Aoki, Oribatula sakamori Aoki, Camis~a segnis (Hemann), Scheloribates Jatipes (Koch), Oppiella nova (Oudemans), Lauroppia neerlondica (Oudemans), Hemileius sp.. Oripodo sp., Twncopes sp.. and Tectocehpeus sp. etc. Among them, Tuberemaeus singularis and Zygoribotulo elongatn are recorded from Korea for the first time And three lalvae are found out at intestine of one specimen of Tuberemoeus singularrs Sellnick which is collected on Cryptomerio japonica D, in Chep (Seoguipo). Therefore, thls mite seems to be ovoviviparous.

• 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.

• Animal Systematics, Evolution and Diversity
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• v.9 no.1
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• pp.13-18
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• 1993

Two new species of the genus Phytoselus are described from Korea: P. (P.) seungtall n. sp. from Ky6nggi Province and P. (P.) sonunensls n. sp. Rom Chonbuk Province.

• The Korean Journal of Pesticide Science
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• v.4 no.4
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• pp.40-47
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• 2000

The comparative toxicity of ten acaricides, seven insecticides and five fungicides to the two-spotted spider mite, Tetranychus urticae and its predators, Amblyseius womersleyi and A. eharai was evaluated by a leaf spray bioassay. Five of the acaricides tested, bifenazate, etoxazole, acequinocyl, flufenoxuron and chlorfenapyr were much less toxic to adult females of A. womersleyi and A. eharai than to T. urticae adult females. A. womersleyi adult females treated with five acaricides produced $52{\sim}93%$ as many eggs as untreated adult females. And A. eharai adult females treated with five acaricides laid $54{\sim}73%$ as many eggs as untreated adult females. The remaining acaricides showed high toxicity to adult females of A. womersleyi and A. eharai. All the insecticides tested were less toxic to T. urticae adult females than to adult females of A. womersleyi and A. eharai. However, tebufenozide and diflubenzuron did not significantly affect the survival and reproduction of adult females of A. womersleyi and A. eharai. All the fungicides tested showed low mortality (${\leq}24%$) to adult females of predatory mites. However, benomyl had significant effect on the reproduction of adult females of A. womersleyi and A. eharai. Four acaricides (bifenazate, acequinocyl, flufelloxuron and chlorfenapyr) were much less toxic to eggs of A. womersleyi and A. eharai than to T. urticae eggs. However, etoxazole caused relatively low hatchability ($58{\sim}62%$) of eggs of A. womersleyi and A. eharai. All the insecticides and fungicides tested did not significantly affect the hatch of eggs of predatory mites. It may be suggested from these results that four acaricides, two insecticides and four fungicides described could be Incorporated into the integrated mite management system with A. womersleyi and A. eharai in pear orchard.

• Korean journal of applied entomology
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• v.32 no.4
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• pp.433-439
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• 1993

Morphological characteristics and taxohomy of the two most important Tarsonemid mutes in agriculture, cyclamen mite (Phytonemus pallidus (Banks), 1899) and Broad mite (Polyphagotarsonemus lalus Banks, 1904) are described and drawings of ventral and dorsal views of females and males of each species are provided. Cyclamen mite was collected from fatsia japonica, and Broad mite was collected from Capcicum annuum, Rhododennon schlippenbachil, impatrens sulianti, Ilex serrata, and Fraxinus rhynchophylla.

• Korean journal of applied entomology
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• v.50 no.4
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• pp.295-299
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• 2011

This study presents the list and key to the 8 species of the Subfamily Typhlodrominae from Korea including a newly recorded species, Typhlodromus coryli Wu and Lan, 1991. This subfamily comprises four genera: Kuzinellus Wainstein, Paraseiulus Muma, Galendromus Muma, and Typhlodromus Scheuten.

• Animal Systematics, Evolution and Diversity
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• v.3 no.2
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• pp.64-116
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• 1987

The purpose of the present paper is to record taxonomic notes on several Korean spider mites. The specimens on which this study is based were collected by the authors during the period from May, 1986 to June, 1987. The following species are the spider mites concerned in this paper. 1. Panonychus citri (McGregor), 2. Eotetranychus populi Koch, 3. Eotetranychus smithi Pritchard and Baker, 4. Shizotetranychus bambusae Reck, 5. Schizotetranychus celarius (Banks), 6. Shizotetranychus leguminosus Ehara, 7. Oligonychus orthis Rimando, 8. Tetranychus ranzawai Kishida, 9. Tetranychus phaselus Ehara, 10. Tetranychus trancatus Ehara , 11. Tetranychus vienensis Zacher, 12. Tetranychus urticae Koch . Among them, eight species with asterisk are newly recorded from Korea . In addition, empodiums of pretarsus were carefully observed and enzyme patterns by electrophoresis were compared on some species in order induce their systematic inter-relationship at either species or generic level.

• Korean journal of applied entomology
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• v.29 no.1
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• pp.20-24
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• 1990

Studies were carried out to investigate the overwintering densities of spider mites, hatching rate and time of P. ulmi eggs, and seasonal occurrences of spider mites (P. ulmi and T. urticae) in apple orchards of Kyungpook province from 1987 to 1989. Overwintering density of P. ulmi eggs was higher in Kunwi, Andong, Chilgok but lower in Kyungju. Overovintering densities of T. urticae were high in all the regions. With the hatching time and rate for P. ulmi eggs, the first hatching ate was April 14, and the last was May 3, and the average hatching rate was 89.3%. The density of P. ulmi was high from early May to middle July and T. urticae begin to increase rapidly from middle June and then was continuously high upto fruit harvesting time.

• 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.

• Korean journal of applied entomology
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• v.35 no.3
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• pp.266-272
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• 1996

The selective tox\ulcornercity of fenpyroximate to the predatory mite Amblyseius womersleyi and the twospotted spider mite Tetranychus urticae was evaluated. Adult females and eggs of both species were placed on bean leaf dis~sd ipped in several concentrations of fenpyroximate. Fenpyroximate was much less toxic to A. womersleyi than to T. urticae. Although the survival of adult females of A. womersleyi tended to decrease with increasing fenpyroximate concentration, 58-74% of predators remained alive at concentrations of 6.25-50 ppm. However, reproduction of predators was not significantly reduced at any of the concentrations tested. At 6.25-50 ppm, 32-40% of twospotted spider mite adult females survived but all survivors were immobilized. Moreover, reproduction of twospotted spider mites was reduced with increasing fenpyroximate concentration. Fenpyroximate did not affect the hatch of A. womersleyi eggs or the development of immature predators. Although survival of immature predators decreased with increasing fenpyroximate concentration, 16-48% of immature predators reached adulthood at 6.25-50 ppm. However, all immature spider mites failed to develop to adulthood at 6.25-50 ppm. Adult female predators survived on a diet of twospotted spider mites intoxicated with fenpyroximate, and their fecundity and sex-ratio of the progeny were not substantially affected. Fenpyroximate at selective sublethal concentrations (6.25-12.5 ppm), therefore, could be of value in adjusting predatorlprey ratio in integrated management of twospotted spider mites.