호박과실파리(Bactrocera depresaa)는 한국, 일본, 중국에 분포하는 해충으로 최근 단호박, 맷돌호박 등 호박의 수요 증가로 그 피해가 증가하는 실정이다. 이러한 호박과실파리는 성충이 호박 과실 표피를 뚫어 내부에 산란하여 유충이 과실 내부를 가해하기 때문에 처리시기를 놓치거나, 약제침투가 저조한 살충제로는 방제가 어려운 실정이다. 이에 따라 본 시험은 노지 호박 내 발생하는 호박과실파리의 방제를 위해 사이안트라닐리프롤 유제를 이용하여 경엽처리 효과를 검토하였다. 시험은 유과기에 산란하는 습성을 지닌 호박과실파리를 고려하여 암꽃이 달려 있는 유과를 대상하였으며, 성충 발생초기에 사이안트라닐리프롤 유제를 처리하여 약제처리 20일 후 피해과율 및 과실 내 유충수를 조사하였다. 조사 결과, 사이안트라닐리프롤 5% 유제를 2,000배로 성충 발생초기 7일 간격 2회 처리 시 피해과율과 유충수 조사 모두 90% 이상의 높은 방제효과를 보였다.

최근 이상기후로 인한 총채벌레 발생 증가와 Neonicotinoids계, Pyrethroids계, Spinosyns계, Avermectins계 약제의 과다 살포, 중복 살포로 인한 저항성 발달로 총채벌레 방제가 어려운 상황이다. 본 연구에서는 총채벌레의 약제저항성 관리 및 효율적인 방제전략을 세우기 위한 기초 연구로 곤충성장저해제(insect growth regulator, IGR)의 적용 가능성을 검토하였다. 꽃노랑총채벌레 알, 1령 약충, 2령 약충, 성충으로 나누어 시험 약제를 처리하고, 조사는 약충의 경우 168시간까지 생충수, 알과 성충은 144시간까지 생충수와 부화 약충수를 조사하였다. 조사결과 클로르플루아주론 유제는 1령 약충, 2령 약충에 대하여 접종 168시간 후 각각 100%, 80%의 방제효과를 나타내었다. 또한 시험약제를 성충에 처리 시 산란에 대한 영향도 확인할 수 있었다. 본 연구결과를 통해 곤충성장저해제의 꽃노랑총채벌레 령기별 적용 가능성을 확인할 수 있었으며, 총채벌레 적용약제의 계통을 다양화하여 저항성 관리에도 도움이 될 수 있다고 판단된다.

The environmental friendly control of Platypus koryoensis (Murayama), a vector of oak wilt disease, was investigated using citral. To develop an effective attracted trap was performed in Yeoju (semi-field), Gunpo (field) and Cheongju (field). Using a ratio of four attractant (ethanol 100%, ethanol+citral (90:10, 95:5), ethanol+citral+hexane extract of Quercus mongolica (90:5:5)) was investigated attractive effects for the Platypus koryoensis. Most P. koryoensis were attracted to mixture of ethanol+citral (95:5). As a result, when using a citral in a certain concentration is would be able to develop an effective and environmental friendly control agent.

Pseudococcus longispinus, a notorious cosmopolitan pest species of mealybugs, known to be distributed indoors in Korea since 2002, is found to be mixed with another species, Pseudococcus orchidicola. Finding P. orchidicola as a pest of tropical plants in Korea is rather unexpected because of their main distribution in Pacific area and South Asia. However, all the available information from morphology, molecule and advices on identification from mealybug specialists indicated this is best matching P. orchidicola. Morphological, molecular and some biological notes on P. orchidicola are provided with some adult and nymphal images, and compared with P. longispinus. A full discussion mainly on identity and distribution of P. orchidicola is given.

In Korea, six mealybug species have been reported on pears. This study investigated the occurrence of mealybugs in 19 pear orchards from 2013 to 2014. Two species, Crisicoccus matsumotoi (Siraiwa) (Hemiptera: Pseudococcidae) and Pseudococcus comstocki (Kuwana) were mainly found. The dominant species was C. matsumotoi identified on 73% of infested fruit. Toxicities of 14 registered insecticides (7 single formulations and 7 mixed formulations) commonly used to control P. comstocki were evaluated to C. matsumotoi nymphs and adults at the recommended concentration. As a results, all insecticides exhibited strong insecticidal activity with 100% mortality of both nymphs and adults. These results indicate that the 14 insecticides can be used in control for C. matsumotoi in field.

Jabon tree(Anthocephalus cadamba Miq.) is a native and fast growing species in Indonesia that is preferred by the local community because of its good adaptability and economic profitability. However, information on this tree and its appropriate silvicultural practices are still lacking. Therefore, the aims of this study were to (1) document the existing silvicultural practices used by local communities, (2) investigate tree growth performance among different sites, and (3) examine the linkage between silvicultural practices and soil fertility and their effects on stand quality in West Java. The results obtained from interviews indicated that most of the jabon plantations are owned by outsiders from Jakarta or other cities. In addition, there are three types of management: partnership, hiring employees and direct management. There are only a few practitioners with silvicultural training; however, all practitioners have implemented basic silvicultural practices. Jabon plantations in West Java were inventoried and 53 plots were established across 19 sites. This species was introduced into Java in 2008; therefore, tree age ranges from 0.5 to 3.5years. The mean diameter ranges from 2.45 to 14.57cm with a maximum of 29.3cm, and the mean height ranges from 1.29 to 12.62m with a maximum of 18.68m in Situgede. Regression modeling was performed using dominant height, and the Chapman model was selected to generate a site index curve: Hd=10.6982(1-exp(-0.8915t))1.3078, with an R2 value of 0.6513. This model divided the 19sites into three categories, i.e., good, medium and poor. Based on these results, there are 2 good, 11 medium and 6 poor sites. Three DBH-age equations were generated based on site classification. A comparison between good and poor sites suggests that site conditions and soil fertility have more significant effects on the growth of jabon than silvicultural practices such as fertilization and site maintenance.

The repellent activities of 33 plant extracts against Aedes albopictus were examined using a patch test for adult. The six plant extracts (Magnolia denudate, Dryopteris crassirhizoma, Cnidium officinale, Lindera obtusiloba, Magnolia kobus, and Houttuynia cordata) showed over 70% repellency activities to Ae. albopictus. The insecticidal activity of Curcuma longa against Ae. albopictus was also determined. C. longa hexane extraction showed 100% larvicidal activity at 1,000 ppm after treated 24 h. Purification of the biologically active constituents from the hexane extraction with larvicidal activity was done using silica gel column chromatography. H1 fraction gave 100% mortality to Ae. albopictus at 100 ppm. H12 fraction was determined 87.8% larvicidal activity to Ae. albopictus at 50 ppm. Active constituent was analysed as the sesquiterpene, ar-turmerone (C15H20O) by GC and GC-MS. C. longa extract gave highly protection against mosquito bites. The hexane extraction showed complete protection at 10 mg over 6 h. In this study, the sesquiterpene from C. longa induced a protection time, repellency, landing time, and biting time against Ae. albopictus. These results suggest that the some plant extracts and C. longa have the potential to be used an eco-friendly materials for the control of mosquitoes.