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Occurrence tendency of the natural enemies of Ceroplastes rubens in citrus on Jeju island
Jeong Hoon Park,Young Min Kim,Moon Hyang Ko,Jeong Heub Song,Tae Hyeon Heo 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04
루비깍지벌레 Ceroplastes rubens는 감귤에 피해를 주는 주요 깍지벌레 중 하나로 연 1회 발생하며 수액을 흡즙하는 직접적인 피해와 분비된 감로로 인한 그을음병 유발의 간접적인 피해가 발생하고 있다. 제주지역에서 루비깍지벌레 천적으로는 루비붉은깡충좀벌 Anicetus beneficus와 애홍점박이무당벌레 Chilocorus kuwanae 2종이 확인되었다. 1975년 일본에서 도입 방사한 천적인 루비붉은깡충좀벌이 현재까지 지속적으로 발생하고 있었으며, 루비깍지벌레 발생 억제에 영향을 미치고 있었다. 2018년 4월부터 12월까지 도내 유기재배 감귤원 (2개소)에서 황색끈끈이트랩을 이용 루비붉은깡충좀벌 성충의 시기별 발생양상을 조사한 결과 월동세대 성충은 5월 중순, 제1세대와 제2세대 성충은 각각 7월 중순과 8월 하순에 발생 정점을 나타내었다. 조사 포장에서 루비깍지벌레의 기생률은 9월 중순에 9.6%와 19.6%이었다.
Overwintering and Flight Phenology of Spodoptera exigua (Lepidoptera: Noctuidae) in Jeju
Jeong Heub Song,Soon Yeong Hong,Shin Chan Lee,Seong Keun Kang 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.10
Beet armyworm (BAW), Spodoptera exigua (Hübner), is a polyphagous lepidopteran pest mainly distributed in tropical and subtropical regions. BAW are known to migrate long distances to find suitable host plants and environmental condition. The possibility of its overwintering in temperate regions has been suspected. This study was conducted for investigating overwintering and phenology of BAW using by sex pheromone trap in Jeju during 2007 to 2011. BAW was able to overwinter at pupae stage regardless of temperature of winter season in Jeju. The times of BAW caught first on traps were different by surveyed years - early March in 2007, middle March in 2008 and 2011 and early April in 2009 and 2010. The times of BAW caught on trap tended to be more dependent on temperature variation during on November and December than on mean temperature of winter season. The peak season of adults of the overwintering generation was early to middle of May. The results of seasonal periodicity of BAW monitored by sex pheromone trap during 2009 and 2010 indicated that five generations were passed in Jeju. The peak season of 1st generation was on middle of April, 2nd generation on middle of July, 3rd generation on early of August, 4th generation on late of August and 5th generation on middle of September. There were similar patterns by different above sea levels except the season of overwintering generation adults occurrence (March to May).
Sampling of Unaspis yanonensis (Hemiptera: Diaspididae) in Citrus Orchards, Jeju
Jeong Heub Song,Soon Yeong Hong,Shin Chan Lee,Seong Keun Kang 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05
Arrowhead scale, Unaspis yanonensis, is a serious scale insect pest of citrus in Jeju. The sticky taping of 1.0 cm diameter twig was a good survey method for arrowhead scale crawler. There are three times crawler occurrence season - late May to early July, late July to middle September and late September to late October. But the third occurred crawlers are all died during overwintering in open-field groves. This study was conducted to provide information on efficient sampling plan for arrowhead scale within the tree. Twig and fruit was fit for secondary sample unit by two-stage variance analysis. Both sample number per tree (primary sample unit) was eight twigs or fruits. Taylor’s power law was better described the distribution characteristic of arrowhead scale than Iwao’s patchiness regression. The slope of both linear regressions was greater than “1” which means aggregative distribution pattern. Minimum sample size to estimate the density was calculated using by two parameters of Taylor’s power law. To estimate the mean density on twig and fruit by binomial sampling plan, the optimum tally threshold was 5 and 7, respectively.
Jeong Heub Song,Kyung San Choi,Soon Yeong Hong,Sin Chan Lee 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.05
Some responses of cryptic mealybug, Pseudococcus cryptus, for a sex pheromone, [(1R,3R)-3-isopropenyl-2,2-dimethylcyclobutyl]methyl 3-methyl-3-butenoate, were studied to develop the applying strategy of sex pheromone trap for efficient monitoring and control-time decision in citrus orchards grown in greenhouse for 2 years (2007-2008). The optimal concentration of a sex pheromone was 1.0㎎ per hexane 100㎕ in a using pheromone lure. There was no significant effect of the attraction of male adults among different colours (white, blue and yellow) of plate-type trap baited with sex pheromone. The more male adults were attracted, as the distance of a pheromone trap form a citrus tree infested with cryptic mealybug was closer. The male adults were caught to sex pheromone trap from middle April to late November, and its peak period was the middle of July. The thermal constant for the next attraction was about 640 degree-days (lower threshold temperature=12℃) after confirmed the first attraction of male adults. The optimum control time for cryptic mealybug after the first attraction of male adults were confirmed was estimated as 450 to 500 degree-days.
Jeong Heub Song,Jeong Hoon Park,Tae Hyeon Heo 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04
파밤나방은 배추과 채소 등 여러 농작물에 피해를 주고 있는 중요한 나방류 중의 하나이며, 돌발적으로 다발생한 경우 큰 피해를 주기도 한다. 제주지역에서 배추과 채소 주요 재배지역인 제주시 한림읍에 2007년부터 2011년까지 파밤나방 성페로몬 트랩을 이용하여 시기별 발생밀도를 조사하였다. 트랩에 최초 유인 시기는 4월 상순이었으나 3월 온도가 높은 해에는 3월 상순에 유인되기도 하였다. Karimi-Malati et al.(2014)의 발육온도 모델을 이용하여 제주지역에서의 연간 발생세대수를 추정한 결과 4∼5세대를 경과하는 것으로 추정되었다. 성페로몬 트랩의 발생 절정기별 다음 세대 성충 발생시기와 트랩 유인밀도와의 관련성을 2009년과 2010년 조사 자료에 대해 검토한 결과 연관성이 낮은 시기가 나타났다. 이 시기 NOAA의 HYSPLIT 모델(Rolph et al., 2017)을 이용하여 기류의 역방향과 순방향 궤적선을 추적한 결과 중국으로부터 장거리 이동이 가능할 것으로 추정되었다. 장거리 이동에 관여하는 기상요인과 비래원은 6∼7월에는 장마전선 등에 의한 중국의 남중부지역이, 8∼9월에는 중국의 북동부지역으로 나타났다.
Development of integrated pest managemant mannual on brussels sprouts in Jeju, Korea
Jeong Hoon Park,Jeong Heub Song,Young Taek Yang,Kwang Ju Lee,Hyo Jeong Kim,Chang Sook Jwa 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.04
제주지역 방울다다기양배추 포장에서 발생하는 병해충에 대한 발생특성을 구명하기 위하여 2016 ~ 2017년(2개년) 7월(파종기)부터 이듬해 2월(수확기)까지 육안 관찰과 성페로몬 트랩을 이용하여 조사 하였다. 방울다다기양배추에 발생하는 병해충은 병해 5종, 해충 15종으로 총 20종이 조사되었으며, 주요 병해는 검은썩음병, 검은무늬병, 해충은 배추좀나방, 도둑나방, 배추흰나비, 양배추가루진딧물이었다. 성 페로몬 트랩을 이용하여 주요 나방류 발생시기를 조사한 결과 배추좀나방은 연중, 파밤나방과 담배거세미나방은 9월~11월에 주로 발생되었으며, 도둑나방은 성 페로몬 트랩에 의한 포획 개체수는 적었으나 피해는 심한 편이었다. 얻어진 결과를 활용하여 방울다다기양배추의 시기별 주요 병해충 발생 및 방제체계를 도식화하였다.
Jeong Heub Song,Soon Yeong Hong,Shin Chan Lee,Sang Soon Lee 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.05
The males of cryptic mealybug, Pseudococcus cryptus, were attracted on trap baited with or without a synthetic sex pheromone. The attractiveness of sex pheromone trap was higher than yellow-color sticky trap, but both phenologies were similar. There was a positive relationship between mean density of 2nd nymph to adult cryptic mealybug and the density of the male caught on trap. The density of cryptic mealybug per tree was higher correlated with yellow-color sticky trap than sex pheromone trap. The pattern of cryptic mealybug male occurrence had two to three cohorts in a generation resulted from overwintering stage. The maximum occurring time of 1st to 2nd nymph stage could be estimated from the peak time of trap catch by effective temperature accumulation. The higher and lower threshold temperature was estimated as 10.9 and 32.6℃, respectively and its thermal constant was 360 degree-day. The cryptic mealybug parasitoid, Anagyrus sp., which was first recovered in Jeju in 2009, was well attracted on yellow-color sticky trap. There was a high correlation between the density of Anagyrus sp. and of cryptic mealybug males caught on trap.