• Korean journal of applied entomology
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• v.57 no.3
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• pp.143-149
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• 2018

The black pine bast scale (BPBS), Matsucoccus thunbergianae (Homoptera: Margarodidae), is one of the most serious insect pests of Japanese black pine (Pinus thunbergiana) in Korea. The density of BPBS varies by tree, branch, and location, making it difficult to monitor them. This study investigated to find a monitoring method for distribution and occurrence of BPBS on Japanese black pine using the yellow sticky trap. The density of male BPBS on sticky trap and nymphs from the branch of Japanese black pine was highly correlated in various surveyed sites. The number of male BPBS that attracted to the yellow sticky traps was higher in upper crown than the lower crown of P. thunbergiana but this was not statistically significant. The density of BPBS nymphs increases with the increase of the diameter of the branch, but the differences were not significant from 1 to 2.5 cm. BPBS was highly distributed in bottom-faced branch than the upper-faced branch of P. thunbergiana. Therefore, we suggest, the yellow sticky trap for the monitoring of BPBS and when examining the nymph density in branch, it is recommended that the bottom-faced branch of the 2-2.5 cm diameter branch be examined.

• Korean journal of applied entomology
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• v.62 no.3
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• pp.131-137
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• 2023

The striped fruit fly, Zeugodacus scutellata (Diptera: Tephritidae), is one of important pests in Cucurbitaceae plants. The cuelure is currently using with various forms for surveillance to the Z. scutellata male as well as Z. cucurbitae, Z. tau, and Bactrocera tryoni, which are categorized as prohibited-quarantine fruit flies in Korea. This study was conducted to verify the attraction effect of applying the cuelure in different forms in field conditions. In this study, we used cuelure by 3 different forms as solid, liquid, and wax to striped fruit flies using the Steiner trap. The trap was placed in two Jeju and one Gyeongbuk regions and the number of attracted flies by each cuelure form is monitored by every 2 weeks during 2021. Attraction effect on Z. scutellata was significant difference by different cuelure forms in two Jeju regions. Liquid and wax forms of cuelure showed high attraction number to the Z. scutellata male compared with solid form when flies were occurred with high population from July to August in Jeju. However, there was no significant difference on attraction effect at low population in Juju and Gyeongbuk by different forms. Based on field assay, liquid and wax form of cuelure are recommended for surveillance against Z. scutellata male. Furthermore, these results also strongly suggest that the attractant, liquid and wax forms of cuelure, could be effective for surveillance to quarantine fruit flies such as Z. cucurbitae, Z. tau, and B. tryoni in Korea.

• The Korean Journal of Mycology
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• v.10 no.2
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• pp.85-88
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• 1982

In order to investigate flight number of ascospores of the wheat scab fungus as a primary inoculum, the experiment was undertaken at three localities including Suweon during the two years 1979 to 1980. Ascospore fllight of the fungus was begun at the first part of April, and amounts of flight number of ascospores were varied by different localities. It showed a tendency that large number of ascospore fllight was proportionally resulted by higher amounts of rainfall. As a result, a high positive correlation was obtained between flight number of ascospores of the fungus and amounts of rainfall.

• Korean journal of applied entomology
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• v.58 no.4
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• pp.319-320
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• 2019

We have developed simple and reliable new habitat plants system with natural enemies names as "Natural Enemy in First (NEF)" method. As a result, NEF without monitoring and release of just natural enemy with monitoring showed higher bio-control effects, i.e., 83% and 70%, respectively than environmental friendly agricultural material (EFAM) treatment. In addition, the average population density of predatory mites on NEF method was higher (three times) than other treatment.

• Korean journal of applied entomology
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• v.21 no.1 s.50
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• pp.19-22
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• 1982

There was a highly positive correlation between the number of trapped conidia from fourteen days to four days before direct observation of blast lesion was made and leaf blast incidence. This same relationship was found between the number of conidia trapped from August 11 to August 15 and August 21 to August 25 and percent of panicle blast incidence in a Japonica type cultivar Jinheung. Using iodine-potassium iodide (I-KI) method, it was able to detect infection sites of the blast fungus under the field conditions within 30 minutes. The detection of infection sites was four days earlier than direct observation of leaf blast lesion.

• 동물약계
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• no.105
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• pp.3-5
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• 2006

조달청 방역용 살균제 구입입찰/동물약사감시 행정처분 결과 홍보/국립수의과학검역원 자문위원 위촉/1/4분기 가축전염병중앙예찰협의회 참석/동물약품 사양시험에 관한 업무협약 체결/보조사료 성분등록 현황 정보공개 청구/축산현안 설명회 참석/안전축산물의 효율적 생산을 위한 세미나 참석/소독약품 효력시험 관련 수요조사 실시/제2차 법제윤리위원회 개최/동물약품 마케팅과정 교육 실시/농협 방역 소독약품 구매입찰 안내/제2차 이사회 개최/협회 직원 승진 인사/2004년도 세계 동물약품 시장 규모

• 동물약계
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• no.30
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• pp.4-5
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• 1996

1. 신규허가 2. 제조(수입)업 허가사항 변경 3. 사료첨가제 임가공에 대한 질의회신 4. 양축농가 지도계몽 실적조사 5. 가축질병중앙예찰협의회 개최 6. 가축전염병 발생정보 7. 과대광고 금지 8. 건의서 회신 9. 생물학적제제 유통관리 10. 유당사용실적 보고 11. 한국우병학회 창립 12. 대한수의사회 책자발간 13. 돼지 인공수정 책자발간 14. 국검품 수입절차 안내 15. 유방염 치료용 연고제제 색소첨가 16. 제 2 차 이사회 개최

• Korean journal of applied entomology
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• v.17 no.2 s.35
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• pp.81-87
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• 1978

Late blight incited by Phytophthora infestans (Mont.) de Bary, is an important problem for seed potato prodcution in Korea. At the alpine Daekwanryeong area, unprotected potatoes are often defoliated within 14 days after late blight is first observed in the field. Since regular spraying can control late blight, the forecasting service is needed for timely initiation of the spraying program. Climatological data and notes on late blight incidence were recorded during 1970-1977 at the Alpine Experiment Station. The moving graph method using 7-day average mean temperature and 7-day total rainfall did not give highly accurate forecasts. Adding data on relative humidity and 7-day average minimum temperature increased the usefulness of the moving graph. Yields of late blight susceptible varietieties in sprayed plots were related to late blight occurrence and to the rainfall distribution pattern.

• Korean journal of applied entomology
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• v.48 no.1
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• pp.59-65
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• 2009

This study was conducted to determine pheromone trap type and height in forecasting populations of R. clavatus in soybean fields using pheromone. The most effective pheromone trap type and height in forecasting populations of R. clavatus were fish trap and 60 cm above ground. Ratio of R. clavatus adults female and male in soybean field was 1.5 to 1 and Piezodorus hybneri was also attracted to the aggregation pheromone trap of R. clavatus. Attractiveness of two stink bug species caught on synthesis pheromone of R. clavatus was surveyed with imported production and synthesized production. Imported pheromone attracted only adult of R. clavatus, but synthesized pheromone attracted both adult of R. clavatus and P. hybneri. Change of population of R. clavatus was observed using pheromone trap and sweeping method in soybean field. Adults of R. clavatus occurred from early August and the population reached its peak in early September when pheromone trap was used. In case of sweeping method, its fluctuation pattern was similar to that of pheromone trap.

• Korean journal of applied entomology
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• v.35 no.2
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• pp.119-125
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• 1996

Temperature-dependent development study for overwintered eggs of Pseudococcus comstocki (Kuwana) wasconducted to develop a forecasting model for egg hatch date. Hatch times of overwintered eggs were comparedat five constant temperatures (10, 15, 20, 25, 27$^{\circ}$C) and different collection dates. A nonlinear, four-parameterdevelopmental model with high temperature inhibition accurately described (R2=0.9948) mean developmentalrates of all temperatures. Variation in developmental times was modeled(~~=0.972w9)it h a cumulative Weibullfunction. Least-squares linear regression (rate=O.O06358[Temp.]-0.07566)d escribed development in the linearregion (15-25$^{\circ}$C) of the development curve. The low development threshold temperature was estimated 11.9"Cand 154.14 degree-days were required for complete development. The linear degree-day model (thermal summation)and rate summation model (Wagner et al. 1985) were validated using field phenology data. In degreedaymodels, mean-minus-base method, sine wave method, and rectangle method were used in estimation of dailythermal units. Mean-minus-base method was 18 to 28d late, sine wave method was 11 to 14d late, rectanglemethod was 3 to 5d late, and rate summation model was 2 to 3d late in predicting 50% hatch of overwinteredeggs. hatch of overwintered eggs.