Fumigant toxicity of four plant essential oils (muguet flower, patchouli, pennyroyal, spearmint) were tested against the adults of westem flower thrips, Frankliniella occidentalis. Among them, pennyroyal and spearmint oils showed 100% mortality at 1 ㎕/45 ㎖ air dose. Through the constituent analysis using GC and GC-MS, we confirmed that main constituents of pennyroyal oil were pulegone(100.0%), and spearmint oil were β-myrcene(3.5%), limonene(12.1%), carvone(85.4%). Among them, carvone and pulegone showed 100% fumigation at 1 ㎕/45 ㎖ air dose, respectively. It can concluded that two oils aloe potential control agents against F. occidentalis.

바퀴벌레(Blattella germanica)에 대한 coriander oil (Coriandum sativum) 등 5종의 식물정유의 훈증독성을 조사하였다. 그들 중 spearmint oil이 20과 (air)의 약량처리에서 모두 의 높은 살충활성을 나타내었다. Coriander를 GC와 GC/MS로 분석한 결과, -pinene (), camphene (), -pinene (), -myrcene (), limonene (), -terpinene (), -cymene (), -terpinolene (), camphor (), linalool (), -tepineol (), geranyl acetate (), geraniol ()이 주요 구성성분으로 나타났으며, 그 중 -terpinene과 geranyl acetate가 (air) 약량에서 의 높은 훈증독성을 나타내었다.

점박이응애(Tetranychus urticae)에 대한 34종 terpene의 훈증독성, 접촉독성 및 기피효과를 조사하였다. 훈증독성은 10/1(공기)의 농도에서 isosafrole, safrole이 모두 98.4%의 살비율을 나타내었다. 이 두 화합물의 LD값은 각각 2.6, 4.3/1이었다. 접촉독은 isosafrole만이 알에 대해서 60.2%의 살란활성을 보인 것 외에 대부분의 terpene에서 활성이 낮거나 없었다. 약제감수성 계통에 대한 기피반응을 조사한 결과 hexanoic acid와 limonene이 1,000ppm에서 각각 79.1%와 87.8%의 기피효과를 나타내었다. 한편 fenprothion저항성 계통과 pyridaben저항성계통에 대해서 hexanoic acid는 각각 77.8%과 83.3%의 기피효과를 나타내었다. 그러나 두저항성계통에 대한 limonene(1,000ppm)의 기피효과는 각각 17.8%와 10.0%로서 감수성계통에 대한 기피효과와 상반된 결과를 나타내었다.다.

이 시험은 수직 사이로에 충진된 옥수수를 대상으로 M.B를 사용하여 자연중력하에서 소독할 때 M.B가스의 침투확산성 및 살충효과를 요약하면 다음과 같다. 1. 사이로 표층의 M.B가스 농도는 투약후 2시간후부터 100mg/l 이상에서 20mg/l 이하로 급격히 감소하였다. 2. 사이로 표층으로부터 3m 깊이 지점의 M.B가스 농도는 투약후 12시간이후 100mg/l 이상에서 30mg/l 이하로 감소되었으며 표층의 고농도 M.B가스가 불과 30분 이내에 3m 깊이 까지 침투되었음을 알 수 있었다. 3. 사이로 표층으로부터 고농도의 M.B가스는 13m 깊이 지점까지 1시간 이내에 침투되었으며 투약후 48시간까지 지속적으로 100mg/l 이상40mg/l 이상의 M.B가스가 검지되는 것으로 보아 자연중력하에서 옥수수를 소독하는 경우 13m 깊이 부근에 M.B 가스의 고농도 대를 형성하는 것으로 추측된다. 4. 사이로 기부(21m 지점)의 M.B가스는 에 불과했던 것으로 보아 M.B의 침투가 아주 적었던 것으로 판단되어진다. 5. M.B 가스의 횡 확산성은 수직 침투성에 비하여 매우 적었으며 사이로 길이 3m의 경우 투약방향으로부터 약 13m지점의 qdnl는 중심부의 약 , 그리고 깊이 13m 지점에서는 지점에서는 의 농도에 불과하였다. 6. 투약후 24시간만에 조사한 사이로의 표층 및 기부(21m 지점)에 삽입 했던 공시충(거짓쌀도둑)은 모두 사멸되었으며 48시간후에 조사한 3m, 7m, 및 13m 지점의 공시충도 모두 사충으로 발견되었다.

Background : Replant failure of ginseng is caused by soil-born pathogens causing root rot such as Cylindrocarpon destructans and Fusarium solani. Dazomet are widely used as soil fumigant to solve soilborne problems, and the degradation intermediates are toxic to nematodes, fungi, bacteria, insects and weeds. Methods and Results : The effects of cultivation of green manure crop, maize before and after soil fumigation on the control of ginseng root rot disease were compared using soil of field where 6-years-old ginseng was harvested. Fumigant (dazomet) were used for soil fumigation in May and September, respectively. Maize was grown for soil management before and after soil fumigation. Maize cultivation after May fumigation was delayed the sowing day by 15 days, and the fresh and dry weight decreased significantly. Maize cultivation after May fumigation increased pH but decreased EC, NO3, P2O5, and K significantly. Maize cultivation after May fumigation decreased fungi population and ratio of fungi and bacteria. Growth of 2-years-old ginseng was improved and the incidence of ginseng root rot was significantly decreased by maize cultivation after May fumigation. After harvesting 2-years-old ginseng, the population of Cylindrocarpon destructans was not different among treatments, but Fusarium solani showed a significant increase in September fumigation after maize cultivation. Conclusion : Maize cultivation after soil fumigation was effective in inhibiting ginseng root rot by improvement of mineral composition and microorganism in soils.

Background : Ginseng is a perennial, and damage occurs due to various diseases and pests. As a result, yield decreases and quality deteriorates. In particular, it is impossible to be repeatedly cultivated due to root rot, soil-borne disease. For this, in order to control root rot and repeatedly cultivate ginseng by using soil fumigation from virgin soil, this experiment was conducted. Methods and Results : This experiment was performed in ginseng farm field, Geumsan-gun, Chungnam province. And total area was 3ha. And the experiment was conducted in soil where apple trees had been grown. Apple trees were rooted up in 2006. And soil was fumigated in May 2007. With regard to soil fumigant, soil was treated with Basamid of 40kg/10a. After soil fumigation, 5 ton/10a of cattle manure fermented for 1 year was put in the soil in June, and then the soil was cared for by being plowed and rotary-tilled as occasion. Ginseng seeds were sowed in the soil cared for in October 2007. And 4-year-old ginseng was harvested in 2011. The soil from which ginseng was harvested was fumigated by the same method in May 2012, and then ginseng seeds were sowed in 1.5ha in October 2012 and in 1.5ha in October 2013. In October 2013, 3-year-old and 4-year-old ginseng was harvested. And ginseng growth characteristics and root rot incidence was examined. It was shown that 4-year-old ginseng yield after the fumigation of virgin soil was nearly 2 times as high as that of conventional virgin soil cultivation. And root rot didn't occur. After that time, the soil was fumigated again. And when ginseng was cultivated, 3-year-old and 4-year-old ginseng yield was 650kg and 960kg per 10a. And it was shown that root rot incidence was 1.3% and 15.3% in 3-year-old and 4-year-old ginseng respectively. Conclusion : This study showed the results where ginseng can be cultivated repeatedly if soil was fumigated again after ginseng was harvested following the soil fumigation from virgin soil so as to control the ginseng root rot and cultivate ginseng repeatedly.

포도 저장중의 가장 큰 문젯점인 부패과 발생을 경감시키기 위하여 acetic acid를 'Campbell Early'와 'Sheridan'품종에 훈증처리하여 그 효과를 조사하였다. 그 결과 포도과실의 탈립정도는 acetic acid를 훈증처리한 후 저장 90일에 두 품종 모두 1.0~1.5%로 나타나 무처리의 2.9~8.0%와 비교하여 탈립억제 효과가 인정되었다. 부패과립은 acetic acid 훈증처리구의 경우 저장 90일에 과방당 0.7~2.