• Korean journal of applied entomology
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• v.7
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• pp.27-32
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• 1969

The purplish stem borer (Sesamia inferens Walker). which was infested in southern part of Korea. attack rice plant. and its damage appear quite serious in some districts. This study was conducted to investigate the life history. seasonal abundance and control of the insect pest. The pest overwinter as larvae and it seems to have 2-3 generations in a year. It takes 56.6 days in the shortest one while the longest one takes 74.6 days. Three peaks of moth appearance are May-June. end of July and end of August, respectively. The effectivencess of insecticides was compared with EPNec $45\%$ and the different granular insecticides in pot experiment. In the result. M. Parathion G. EPNec, Diazinon G and Lebaycid G showed good control of the pest. with the infestation of $12.0,\; 22.9\%,\; 24.7\%,\; and\; 27.3\%$ respectively, while the untreated has $62.6\%$

• Korean journal of applied entomology
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• v.53 no.4
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• pp.497-501
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• 2014

The small brown planthopper, Laodelphax striatellus (Fall$\acute{e}$n) (SBPH) is one of the important rice pests in Korea, which transmits rice stripe virus (RSV) to rice. This pest is an indigenous species in Korea and has also known to migrate from China to the western coastal areas of Korea. This study was conducted to investigate the wing morphs of SBPH and its parasitism rate of Haplogonatopus atratus Esaki et Hashimoto in Korea. In 2014, SBPH were collected in April and July from 16 sites throughout South Korea and their wing morphs and parasitism rates were measured under the microscope. Percentage of brachypterous male in July was significantly declined compared to that in April, while that of brachypterous female did not change. A positive relationship was found between latitude and percentage of brachypterous adults in April. Parasitism rate of both nymphs and adults were higher in April than July. In addition, nymphal parasitism rate was generally higher in western coastal areas.

• Korean journal of applied entomology
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• v.7
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• pp.21-25
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• 1969

In order to find out resistant varieties of the soybean to the cyst nematode. Heterodera glycines Ich. 64 soybean varieties were tested. 1. According to the result of investigations about correlation between numbers of cyst nematodes and soybean yields ; in pot test $Y=36.2-0.63\times(r=-0.74)$. and in field investigation $$Y=10.3-0.32\times(r=-0.56)$. There is a negative correlation between the density of nematodes and the soybean yield. 2. All of the recommended varieties were appeared susceptible; P I-84751. P I-90763. Southern-proripic. Keumgang-sorip. Baektai were appeared comparatively resistant ; and other varieties were appeared to be medium or susceptible. 3. Fewer larvae were developed into adult female cysts in resistant varieties than in susceptible ones.

• Korean journal of applied entomology
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• v.41 no.4
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• pp.299-303
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• 2002

Pratylenchus loosi Loof, 1960 is recorded for the first time from Korea. The nematode was isolated from the roots of tea (Thea sinensis L.) and soil around the roots from Yeongam-gun, Jeo-llanam-do and Namjeju-gun, Jeju-do, Korea. This species has two lip annuli. The female is 433-646 $\mu\textrm{m}$ long: a＝ 29.1-37.5, b ＝ 5.1-6.4, c ＝ 15.0-21.3, vulva(%) ＝ 73.0-85.4. The male body length is 408-512$\mu\textrm{m}$ long: a＝36.1-40.0, b＝4.8-6.7, c ＝17.0-19.0, and spicule ＝ 14.1-18.0 $\mu\textrm{m}$. The stylet is 11.6-18.0 $\mu\textrm{m}$ long and the number of incisures is four. The shape of spermatheca filled with sperm is broadly rounded, oval and quadrangular The shape of tail is narrowly round to subacute.

• Korean journal of applied entomology
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• v.58 no.3
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• pp.203-207
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• 2019

Bemisia tabaci (Hemiptera: Aleyrodidae) is one of the major insect pests causing economic damages to over 900 different crops in the world. Especially, B. tabaci JpL (L. japonica) is known as a species living only in Japan and Korea so far, and mainly in Lonicera japonica and specific plant species. This study was conducted to investigate the occurrence and spread of B. tabaci JpL on Jeju Island in 2019. Of the total 25 areas surveyed, 1,003 individuals of B. tabaci JpL adults were collected from 24 L. japonica and one Conyza sumatrensis. All populations identified belonged to the JpL species. The result of this study showed that the population of B. tabaci JpL has increased at very high speeds to date compared to the previous reports in Korea.

• Korean journal of applied entomology
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• v.34 no.2
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• pp.83-88
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• 1995

Soybean has been cultivated in China for 5,000 years. The soybean cyst neamtode (SCN), Heterodra glycines, was recongnized in Northeastern China in 1899. Currently, it is known to occur in 12 provinces. The biology of SCN was investigated in several provinces. Six races of SCN were identified (race 1, 2, 3, 4, 5 and 7). About f10,000 soybean germplasm lines were evaluated for their resistance to race 1, 3, 4 and 5 of SCN. At least two black-seeded cultivars are resistant to all four races. Several tolerant soybean cultivars with yellow seed coat were released and are in production. Additional resistant cultivars are being developed. Nematicides were not applied in production Potential biocontrol agents and related aspects are being investigated.

• Journal of Sericultural and Entomological Science
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• v.51 no.2
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• pp.185-190
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• 2013

The superworm, as known the larva of Zophobas morio, has been officially imported from 2011 and bred commercially in Korea. But it is named as the corrected scientific name, Zophobas atratus by junior synonym throughout traditional taxonomy in this study and newly designated Korean name as 'a-me-ri-ca-wang-geo-jeo-ri' in terms of resource management. Z. atratus was compared with wild native tenebrionids, Promethis valgipes and a commercial reared Tenebrio molitor on the basis of DNA barcode analysis. As the results, the average genetic divergence was 21.4% between Z. atratus and P. valgipes, and 20.9% between Z. atratus and T. molitor. These large divergences imply these tenebrionids species can be easily identified by DNA barcodes. The results of genetic divergences within species also suggest that Korean populations of Z. atratus, having the same haplotype, might be introduced from the same area of foreign country. On the other hand, a population of T. molitor was separated into two distinct intra-specific groups with DNA barcoding gaps ranged from 1.17- 2.19%. We suppose that domestic breeding entities of T. molitor might be introduced and mixed from two different local groups. Through this study, we expect that classification for two tenebrionid introduced from foreign countries can be used for the management of insect resources in Korea.

• Korean journal of applied entomology
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• v.28 no.4
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• pp.210-220
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• 1989

Studies on the distribution pattern of soil arthropods were carried in H.J. Andrews Expt. Forest. Forty-one species of Coleoptera in 14 families were recognized as the dominant group. Also, 7 species of soil mites in 6 families, Typhlodromus, Gymnodaeus, Phauloppia and Scleroribates were recognized without seasonal fluctuation, which made the difference to the outbreak pattern of the Palearctic region. Another species as 16 species of Collembola in 4, families, 16 species of Thysanoptera in 3 families, 10 species of Hymenoptera in 1 family, and 7 species of Acarina in 6 families were recognized. The result showed the importance of the soil arthropod as the primary decomposer in forest ecosystem and the relationship between species diversity and soil condition.

• Korean journal of applied entomology
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• v.25 no.3 s.68
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• pp.129-132
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• 1986

Colonizing aphid species on Chinese cabbage, radish, red pepper and cucumber and their seasonal fluctuations were investigated without insecticide treatment during $1982{\sim}1984$ at an experimental farm in Suweon. The major species among the colonizing aphids in each crops were Myzus persicae (Sulzer) and Lipaphis erysimi (Kaltenbach) on Chinese cabbage and radish; M. persicae (Sulzer) and Aphis gossipii Glaver on red pepper; and A. gossipii Glover on cucumber, respectively. Over 200mm of rainfalls within a 10-day period reduced the aphid populations drastically. Relative abundance of the two major aphids on Chinese cabbage and radish, and on red pepper showed inverse relationships between the spring and autumn densities within the same year.

• Korean Journal of Environmental Biology
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• v.27 no.1
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• pp.31-39
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• 2009

To recognize the species composition and community of chironomid midge in agroecosystem and evaluate removal capacity of organic matter using the dominant species among them. Chironomid midge and invertebrate cohabitants were quantitatively collected at 78 representative stations of five habitat types (in arable land during 2004$\sim$2006) A, paddy fields of the large scale arable land; B, paddy fields of the environmental friendly arable land; C, influent of domestic waste water; D, influent of waste water by livestock; E, the irrigation ditch of paddy area. The total sixteen species of chironomid midges at arable land were presented. And also chironomid midges were recognized by five habitat types: eleven species in D, eight in A, seven in E, six in B, and two in C. We confirmed dominant species in each habitat types as followings: Chironomus nipponensis in A, C, and D; Cricotopus sylvestris in E; Tanytarsus seosanensis in B. Water quality and community index were high in E, but low in A, B, C, and D. Comparing with non-treatment, removal activities of organic matter in bottom by C. nipponensis were increased 18% in 90 individuals treatment.