• Korean Journal of Agricultural Science
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• v.41 no.4
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• pp.341-350
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• 2014

The occurrence of insect pests of Lycium chinense was monitored at 4 organic farms that was cultivated with environment-friendly management at Cheongyang, Chungnam from May, 2012 to September, 2014. Total 4 orders and 18 species occurred in the L. chinense. Among them, 4 major pests and Lepidopteran and Hemipteran insect pests were investigated the occurrence pattern. During the budding, the population density of Myzus persicae was very high in late-May and early-June, and the injury by Lema decempunctata was increased from mid-June. The injuries by Henosepilachna vigintioctomaculata and Hedma lycia sp. were continued throughout the growing season. From the fruit held in late-July, hemipteran insects including Plautia stali and Halyomorpba balys were sucking the fruit, and their injury to L. chinense were gradually increased. In the case of Eriophys macrodonis densities to increase gradually from early July. The population density of E. macrodonis in 2014 was rapidly increased more than 5 times compared with 2012 and 2013. It was supposed that the initial control of mites or the removing of over-wintering density in the past year might be neglected. However, there is a need to more review the factors for the mass occurs.

• Korean journal of applied entomology
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• v.48 no.1
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• pp.29-35
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• 2009

Three lepidopteran insect pests of the legume pod borer, Maruca vitrata (Lepidoptera: Pyralidae), the soybean pod worm, Matsumuraeses phaseoli (Lepidoptera: Tortricidae) and an Ostrinia spp. (Lepidoptera: Pyralidae) attacking adzuki bean, Vigna angularis, were confirmed as the major insect pests during the reproductive developmental stage of adzuki bean, and M. vitrata existed dominantly. Almost all plants in the adzuki bean field were injured by at least one of the three species, and $15{\sim}60%$ of reproductive organs were injured. Unbloomed inflorescence occurred continuously through the reproductive stage of adzuki bean. While the flower was many at the early stage and its number soon decreased, the pod was few at the early stage, but its number increased soon and maintained at a constant level. The results suggested that the adzuki bean injured by insect pests compensate the flower loss by developing new inflorescence, but the compensation do not cause the development of new pods. While M. vitrata and M. phaseoli were observed in flowers, pods and stem mainly during the first half of reproductive stage of adzuki bean, Ostrinia spp. was observed only in pods and stem during the second half. In addition, while all instars of larvae of M. vitrata were observed, larvae between the third and fifth instars for M. pahseoli and Ostrinia spp. were observed.

• Korean journal of applied entomology
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• v.49 no.2
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• pp.159-162
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• 2010

Diprion hani Smith and Cho was first reported as a new species from South Korea in 2007. Major outbreaks occurred in September 2007. Outbreaks were restricted geographically to only three inland areas of central Korea where had previously been reforested with Korean white pine, Pinus koraiensis Seib. & Zucc. The outbreak areas were approximately 50 km in diameter. The sawfly populations decreased drastically in 2008. Environmental factors of the outbreak sites were investigated as a first step to characterize the sites and to understand the population dynamics of the sawfly. During the outbreak in 2007, the average temperature of the sites were $1.3^{\circ}C$ higher than the 30 years average, and the annual precipitation was 384 mm higher than the average from 1971 to 2000. In addition, Monodontomerus dentipes (Dalman), a well-known torymid parasitoid of many sawflies, is reported as a gregarious cocoon parasitoid of D. hani.

• Weed & Turfgrass Science
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• v.6 no.2
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• pp.77-85
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• 2017

Insect pests have been one of the main constraints affecting turf sod cultivation areas, playgrounds, parks, golf courses, airports and other related recreational grounds. However, turfgrass research has been very limited and confined within a limited period of time compared to other branches of crop science in Korea. This review was surveyed from all papers in KCI (Korea Citation Index), SCI (Scientific Citation Index) and SCIE (SCI Expended) journals related to turfgrass research in Korea. Fifty two papers concerning turfgrass insect pest in Korea have hitherto been published in 8 different scientific journals since 1990. Thirty three papers (63.5% of total) were published in Weed and Turfgrass Science. The main topics of focus were divided into two parts; ecological study and control of insect pests. Before the 1990 decade, there were no scientific papers published in relation to turfgrass insect pest science. However, during the 1990, 2000 and 2010 decades, 9, 10 and 14 papers were published respectively in Weed and Turfgrass Science. From 1997, about 2 papers were published per year in the scientific journals. Thirty three insect pest species belonging to 13 families in 6 orders, one Eriophyidae mite, Aceria zoysia and one Armadillidae sowbug, Armadillidium vulgare, have hitherto been listed as turfgrass arthropod pests in Korea. Fifty percent of turfgrass insect pest papers published were focused on whitegrub, Adoretus tenuimaculatus, Popillia quadrigutta and earthworm research in Korea.

• Korean journal of applied entomology
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• v.56 no.4
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• pp.403-412
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• 2017

To investigate the control effect of insect pests by natural enemies, sticky traps were used in commercial tomato greenhouses in Chun-cheon and the experiment fields of Gangwon-do Agricultural Research and Extension Services, Republic of Korea using semi-forcing culture (February to June). We selected low toxicity pesticides, environment-friendly agricultural materials (EFAM), and natural enemies of the study species, combinations of which have been previously used in farms to control insect pests. In this study, Trialeurodes vaporariorum and thrips, which are major agricultural insect pests, were studied in experimental greenhouses. The adult T. vaporariorum population was observed in mid-April and the population of thrips showed occurrences in early April. Regarding seasonal fluctuation, T. vaporariorum peaked in mid-May and thrips peaked after June. one insecticide, spiromesifen suspension concentrate (SC); one fungicide, cyazofamid SC; and two EFAMs containing neem tree extract were shown to be slightly toxic to Encarsia formosa and Orius laevigatus. The results of this study could be used to develop management models using natural enemies of control the insect pests; T. vaporariorum and thrips in semi-forcing culture of tomato.

• KSBB Journal
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• v.15 no.1
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• pp.106-111
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• 2000

Peach fruit month, smaller tea tortrix, and Melotontha incana are major pests of apple and apple trees throughout the country. In this work, we examined efficacies of entomopathogenic nematodes Steinernema carpocapsae and Steinernema glaseri against these apple pests. Steinernema carpocapsae showed 100% mortality after 24hr against peach fruit moth when it was applied on the larva with the concentration of 80 nematodes per larva, but Steinernema glaseri caused 83.3$\pm$5.8% mortality after 24hr at the concentration of 50 nematodes per larva. In the case of smaller tea tortrix, S. carpocapsae and S. glaseri caused 100%, 43.3$\pm$5.8% at the concentration of 50 nematodes per larva after 48 hr, respectively. However, 5~6 instar of Melotontha incana was not killed by treatments with S. carpocapsae and S.glaseri up to concentration of 200~800 nematodes per larva. The motility of nematodes in a soil increased as both inoculation concentration of nematode per larva and temperature increased. The mortality of G. mellonella by S. carpocapsae was 100% up to 10cm in depth and 56.7$\pm$5.8% at 10~15cm in depth when the temperature was $25^{\circ}C$ and 50 nematodes per larva were used.

• Korean Journal of Organic Agriculture
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• v.19 no.3
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• pp.385-396
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• 2011

This study was carried out to develop environmental friendly control for major diseases and pests on Boxthorn (Lycium chinense Mill.). Outbreak of Eighteen diseases and pests were found at the Boxthorn organic yards in Chung-nam province. Among them Powdery mildew (Erysiphe polygoni de Cand.), Hypophyllous mold (Pseudocercospora chengtuensis (Tai)), Western flower trips (Frankliniella occidentalis (Pergande)), Green peach aphid (Myzus pericae (Sulzer)) and Corn earworm (Helicoverpa armigera) needed to be controled by environmental friendly methods for high fruit yield of organic Boxthorn. In summer(Jun) test Bacilus subtilis QST 713 wettable powder and Sulfur wettable powder were effective and in autumn (Sep.) test Sulfur, Copper hydroxide and Paraffinic oil were relatively effective in Powdery mildew. In Hypophyllous mold control test Paraffinic oil and Bacilus subtilis GB - 0365 were effective with above 70% control value. And it was possible to control Western flower trips by natural enemy (Orius laevigatus) by 80% control value. Corn earworm was possible to control by Bacillus thuringiensis subsp. aizawai GB413 flowable and Bacillus thuringiensis aizawa 0423 wettable powder application above 70%. And Green peach aphid was controllable with environmental friendly materials, such as, Bacillus subtilis (Seoncho), Bacillus subtilis (Jinsami) above 80% and Ginkgo nut extract above 70% control value.

• Korean Journal of Medicinal Crop Science
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• v.1 no.1
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• pp.74-80
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• 1993

Survey on the status of cultivation and production of medicinal crop was studied on 18 medicinal herbs and 5 medicinal trees in 66 major crop producing complexes. Native seeds or seedlings of the crops obtained from self-seed or neighbored farmer were cultivated and organic fertilizer was preferred to chemical fertilizer in the complexes. More than 60.7% of farmers were applied compost among the organic fertilizers, while 34.8% of them cultivated without any organic fertilizers. Both of using the compound chemical fertilizers and urea and urea only used were showed 51. 5% and 40.9%, respectively. Ostericum koreanum, Angelica gigas, Phellopterus littoralis, and Bupleurum fulcatum belonging to the family Umbeliferae and Aralia continentalis, Polygonatum sibiricum and Eucommia ulmoides in the complexex were not damaged by insect pests and plant diseases. Mite, aphid, grub, cutworm, onion magot fly and european corn borer were known to as major insect pests and anthracnose, powdery mildew, brown leaf spot, leaf blight and root rot as major plant diseases. Productivity and income of a farm by medicinal crops in the complex were greatly different from seeding time, planting distance, year yielded, and selling routes even in the same cultivation method and in the same cultivated area.

• The Korean Journal of Pesticide Science
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• v.17 no.4
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• pp.402-410
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• 2013

Insect pests damages are increasing on the field of Lycium chinense under environment- friendly management Thus, we was to monitor the occurrence of pests on organic L. chinense in Chungnam Cheongyang and, insecticidal effect of eco-friendly agricultural materials (EFAMs) were tested against major pests. When the buds come out, injury by L. chinense was very high causing the high population density of Myzus persicae in late May and early June, and the injury by Lema decempunctata was increased from mid-June. Otherwise, injuries by Eriophys macrodonis, Henosepilachna vigintioctomaculata and Hedma spp. were continued throughout the growing season. From the fruit held in late July, Hemipteran insects including Plautia stali and Halyomorpba balys were sucking the fruit, and their injury to L. chinense were gradually increased. For the eco-friendly environmental control of M. persicae, L. decempunctata and E. macrodonis, EFAMs containing Sophora flavescens, Melia azedarach (Chinaberry), Chenopodium ambrosioides (Mexican tea), Quassia amara (Amargo), Stemona sessilifolia, Sophora seeds and Nepeta cataria (Catmint), were selected and used to control the insect pests. Control effects of the mixed extract with S. flavescens and Sophora seeds against M. persicae and L. decempunctata were higher than any other EFAM as 84.0% and 86.6%, respectively. In case of E. macrodonis, its control effect was good with the mixed extract with S. flavescens, C. ambrosioides and M. azedarach.

• The Korean Journal of Pesticide Science
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• v.17 no.3
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• pp.213-219
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• 2013

This study focused on the promotion of the insecticidal activity of eco-friendly insecticidal materials against four major insect pest in the organic Chinese cabbage cultivation area. Among insecticidal materials mixture, BT+Matrine+Neem against leaf beetle larva, Phaedon brassicae, showed the highest 94.1% at 0.05% which is the lowest concentration of three treated concentrations. The insecticidal activity of Matrine, Neem, and BT alone (0.1%, w/v) or the mixtures (0.05%, w/v) against Cabbage worm larva, Artogeria rapae, was investigated by leaf disc spray method. The insecticidal efficacy of the mixtures of two or three eco-friendly materials was higher than the single treatment of each material with 94.3%, 100% and 100%. Control efficacy of 0.3% COY+0.05% (95.3%) against the green peach aphid, Myzus persicae was higher than that of 0.3% COY+0.05% Neem (90.2%) and lasted for more than 21 days after one time treatment. At 35 days after treatment, the effect of 0.05% BT+0.05% Matrine and 0.05% BT+0.05% Matrine+0.05% Neem treatments against diamondback moth showed very high insecticidal activity with more than 90% of control value. Therefore, BT, Neem, and Matrine where are properly treated could be effective eco-friendly materials for controlling major insect pests in an organic Chinese cabbage field.