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잠재해충 꽈리허리노린재(Acanthocoris sordidus, Coreidae, Hemiptera)의 무리군 형성에 따른 생태적 특성
강찬영,류태희,권혜리,유용만,윤영남,Kang, Chan Yeong,Ryu, Tae Hee,Kwon, Hye Ri,Yu, Yong Man,Youn, Young Nam 한국응용곤충학회 2016 한국응용곤충학회지 Vol.55 No.3
꽈리허리노린재는 가지과 및 메꽃과 기주에 피해를 주는 해충이다. 꽈리허리노린재는 실내의 $25^{\circ}C$ 조건에서 1세대는 평균 76일정도 소요되며, 성충으로 월동하기 때문에 수명이 길고, 일정한 주기 없이 알을 덩어리로 산란한다. 주로 잎 뒷면에 산란하며, 암컷 한 마리당 평균 195개, 최대 468개까지 산란하는 것으로 나타났다. 또한, 온도가 높아질수록 부화율은 높아지며, 발육기간은 짧아졌지만, $25^{\circ}C$를 제외한 다른 온도에서는 탈피율이 30%이하를 나타냈다. 위 결과를 토대로 선형모델로 추정한 결과 발육영점온도는 $13.9^{\circ}C$, 유효적산온도는 526.3DD를 나타냈다. 고추재배지에서 월동 성충이 6월 말 평균기온 $25.7^{\circ}C$에서 나타나기 시작하여, 9월초에 가장 높은 밀도를 나타내었다. 부화한 개체들은 성충이 될 때까지 이동성이 적었으며 밀집하여 분포하였다. 집단을 형성하는 요인을 알아보고자 Net cage와 Y-tube olfactometer를 이용한 행동실험 결과, 암컷은 수컷과 암컷이 모두 있는 곳을 선택하였지만, 수컷은 암컷과 수컷이 모두 없는 곳을 선택하였다. 수컷이 새로운 기주를 찾아 정착하면, 암컷은 기주를 독점한 동종이 많이 있는 기주를 찾아가는 교미와 관련된 행동을 나타냈으며, 통신화합물의 영향은 알 수 없었다. 집단이 미치는 영향을 알아본 결과 꽈리허리노린재는 좁은 공간에서 집단으로 사육시 약충의 발육기간이 길고 우화율이 높아지는 반면, 개체 사육시 발육기간이 짧고, 우화율이 낮게 나타났다. 반면에 넓은 공간에서는 집단으로 사육 시 약충의 발육기간은 짧고 우화율은 낮게 나타났다. The winter cherry bug, Acanthocoris sordidus (Thunberg), is an insect pest hat damages plants from Solanaceae and Convolvulaceae. The developmental period from egg to adult averages 76 days at $25^{\circ}C$. Adult egg-laying occurred irregularly via spawning, averaging 195 (up to 468) eggs per individual on the abaxial leaf surface of the host plant. Results of linear regression indicated that the lower developmental threshold temperature was $13.9^{\circ}C$ and the effective accumulated temperature was 526.3 DD. Data from a pepper field in 2015 indicated that overwintering adults first appeared during late June (daily average temperature = $25.7^{\circ}C$), reaching maximum density by early September. A choice test examining colonization preferences using a net cage and a Y-tube olfactometer revealed that females gravitated toward conspecifics (other females, males, or both), whereas males moved toward empty areas. Finally, we found that communal breeding results in a longer developmental period and higher eclosion rates than solitary breeding. Developmental periods and eclosion rates were also for colonies in a large space than for those in a small space. This outcome suggests that colonization effects on insect development are stronger in a smaller area.
오존 처리한 폐식용유의 화학구조와 pMDI로 제조한 접착제의 목재 접착강도
강찬영 ( Chan Young Kang ),이응수 ( Eung Su Lee ),류재윤 ( Jae Yun Ryu ),이현종 ( Hyun Jong Lee ),서준원 ( Jun Won Seo ),박헌 ( Heon Park ) 한국목재공학회 2010 목재공학 Vol.38 No.4
The research attempted to develop a wood adhesive based on waste cooking oil, using ozonification technology for the chemical structure modification. The waste cooking oil (WCO) was reacted with O3 for different times; 1 h, 2 h, and 3 h. The chemical structure modifications of the ozonized WCOs were examined by Fourier transform Infrared (FT-IR) spectrum. The FT-IR spectrum of WCO had an absorbance peak at 3,010 cm-1 that was the characteristic peak of the unsaturated double bonds. As ozone treatment time increased, the peak of the double bond was disappeared and carboxyl peak appeared at 1,700 cm-1. Especially, the double bond of 3 hrs-ozonized WCO was vanished almost. In results of the dry bonding strengths of the 3 hrs-ozonized WCO mixed with polymeric methylene diphenyl diisocyanate (pMDI) were the strengths of weight ratio of 3hrs-ozonized WCO:pMDI, 1:0.5, 8.08kgf/cm2, 1:0.75, 9.53kgf/cm2 1:1, 44.16kgf/cm2, 1:2, 58.08kgf/cm2, 1:3, 61.41kgf/cm2, and 1:4, 46.95kgf/cm2. Therefore, it was found that the optimum equivalent ratio was formed at the ratio of 1:2 or 1:3. Under wetting the bonding strength of 1:3 ratio was appeared higher than that of 1:2 ratio, while the results obtained from hot-water and cyclic boiling shear test were similar.
강찬영 ( Chan Young Kang ),이응수 ( Eung Su Lee ),서준원 ( Jun Won Seo ),박헌 ( Heon Park ) 한국목재공학회 2011 목재공학 Vol.39 No.6
The purpose of this study was to investigate and develop an eco-frendly wood adhesive based on vegetable oil (especially soybean oil), the renewable and sustainable natural resources, using ozonification technology for the chemical structure modification. The waste soybean oil (WSBO) was reacted with O3 at the rate of 450 mℓ (acetone): 50 mℓ (WSBO) for different times, 1, 2, 3 hrs. The investigation of the modified chemical strecture of the ozonied WSBOs were conducted using FT-IR. As ozonification time increased, the peak of the unsaturated double bonds was disappeared especially ozonized-3hrs and aldehyde or carboxyl peak appeared because ozonification broke the oil into small molecules. The plywood were made at 150˚C with 4 minutes hot·press time using the different ozonized 3 hrs WSBO/pMDI adhesives and were tested for the dry, wet, cyclic boil test according to the Korea Industrial Standard F3101 Ordinary plywood. The bond strengths gradually incrased until 1:0.5~1:3, but it decreased 1:4, as the contents of pMDI increased. The results of the dry, wet and cyclic bond strengths the equivalent ratio was formed approximately between 1:2~1:3, And the 1:1~1:4 strengths met constantly the standard requirement of 7.0 kgf/cm2 (KS F3101). From the comprehensive view on the results of above experiment, it could be confirmed that ozonized WSBO/pMDI has characteristics of effective reactivity and wet stability showed as an excellent candidate of wood adhesive applications.
구기자에서 큰이십팔점박이무당벌레(Henosepilachna vigintioctomaculata)의 온도조건에 따른 발육특성과 친환경제재에 의한 방제효과
강찬영(Chan-Yeong Kang),류태희(Tae-Hee Ryu),정유빈(Yu-Bin Jung),고나연(Na-Yeon Ko),권혜리(Hye-Ri Kwon),서미자(Mi-Ja Seo),유용만(Yong-Man Yu),윤영남(Young-Nam Youn),김영국(Yeong-Guk Kim) 충남대학교 농업과학연구소 2014 Korean Journal of Agricultural Science Vol.41 No.4
Host plants of the Henosepilachna vigintioctomaculata are known as Solanaceae plants such as potato, tomato, eggplant and Lycium chinense. Henosepilachna vigintioctomaculata (Motschulsky) cause continuous damage from early June to mid-August in leaves of L. chinense under environmental-friendly management in Cheongyang, Chungnam. The developmental period of egg and larva of H. vigintioctomaculata were investigated. H. vigintioctomaculata were reared on L. chinense at several temperatures, for example, 15, 20, 25 and 30°C in the laboratory. In addition, the control effect of 5 eco-friendly agricultural materials were examined. As results, hatching rate is the highest to 91% at 25°C. Egg periods were 10.8, 7.7, 5.1 and 3.7 days at each tested temperature, respectively. And the total developmental periods from egg to adult were 42.7, 26.3, 18.4 and 19.4 days at each tested temperature, respectively. Otherwise, their eclosion rates from pupa to adult were showed 58%, 77%, 85%, 65% at each tested temperature, respectively. As a result of the control effect, both adults and larvae of H. vigintioctomaculata were shown a high mortality to mixture with extract of Sophora flavescens, Chenopodium ambrosioides and Melia azedarach. Additional, larvae is shown high mortality to extract of Azadirachta indica and Cymbopogon nardus. Thus H. vigintioctomaculata might be controled by using plant extract of eco-friendly agricultural materials in due season.