• 한국토양동물학회지
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• 제2권1호
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• pp.59-64
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• 1997

A study was carried out to investigate the distribution of termites at the southern part of Korea between 1995 and 1996. During the survey, termite samples were collected from the randomly selected areas. Most of thern were collected from the decayed woods in dead trees (usually in pine trees), but some were also collected from woodern walls, floors in houses, or in matured bed logs at the mushroom cultivating areas. Damage by this termite species were also observed by Kim and Hwang (1996) who investigated the insect pests of mushroom in the southern part of Korea. To control the termites, it is urgent to identify them and to conduct ecological study of termites. Thus, we firstly identified termites which were collected from the sampling areas including houses and mushrooms cultivating fields. All termite samples were identified as Reticulitermes speratus. However, there were several morphological differences among them according to the collected areas, and the samples were reexamined, identified and divided into subspecies as R. speratus kyushuensis.

• 한국토양동물학회:학술대회논문집
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• 한국토양동물학회 1996년도 토양동물과 유기농업 특별강연 및 학술발표회
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• pp.13-13
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• 1996

• 한국토양동물학회:학술대회논문집
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• 한국토양동물학회 1996년도 토양동물학 특별강연 및 학술발표회
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• pp.7-8
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• 1996

• 한국응용곤충학회:학술대회논문집
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• 한국응용곤충학회 2001년도 추계 합동 심포지엄 및 학술발표대회
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• pp.148-148
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• 2001

• Molecules and Cells
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• 제21권1호
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• pp.89-103
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• 2006

Population structure was investigated in Reticulitermes speratus populations in the Korean Peninsula and the Japanese Archipelago. All trees derived from analyses of the combined sequence dataset of two mitochondrial genes, COII and COIII, showed that R. speratus populations cluster into two major clades comprising the Korean/southern Japanese populations and the northern Japanese populations. Analysis of population genetic structure showed strong genetic partitioning between populations of the two clades. To understand historical migration routes and current distributions, the phylogeographic history of R. speratus was inferred from intra-/interspecific phylogeny and divergence times estimated between the clades of the phylogenetic tree. The estimated migration route and divergence time of ancestral R. speratus are congruent with recent paleogeographic hypotheses involving land-bridge connections between the Asian continent and the Japanese Archipelago. We suggest that ancestral R. speratus separated into northern and southern Japanese populations after its migration into the Japanese main islands from East China during the early Pleistocene via the East China Sea basin, which may have been exposed during that period. The Korean populations seem to have diverged recently from southern Japanese populations; this may explain the current distribution of R. speratus in the Japanese Arachipelago, and account for why it is restricted to northern areas of the Tokara Strait.

• Journal of the Korean Wood Science and Technology
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• 제52권1호
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• pp.31-46
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• 2024

Subterranean termite attacks on cajuput (Melaleuca cajuputi) seedling roots were widespread in several of Java's Perum Perhutani Forest Management Units. This attack was suspected to be related to the chemical components of the cajunput seedling roots. This study was conducted to determine the bioactivity of cajuput seedling root extract as an attractant for the subterranean termite Coptotermes curvignathus Holmgren (Isoptera: Rhinotermitidae). The extraction process was performed according to ASTM D1108-96, and the extract was characterized using gas chromatography-mass spectrometry (GC-MS). Bioactivity testing of the extracts was carried out using attractiveness and no-choice feeding bioassays. The results showed that the average root extraction yield from cajunput seedlings was 4.94%. The attractiveness of the extract solutions at concentrations of 0.50%, 0.75%, and 1.00% were 45.33%, 62.00%, and 74.67%, respectively. The mortality rate of C. curvignathus termites ranged from 9.63% to 24.44%. Cajuput seedling root extract's lethal concentration 50 was 2.45% (non-toxic). GC-MS analysis showed that the extract contained linoleic acid, which has the potential to attract insects.

• 분석과학
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• 제28권3호
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• pp.175-181
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• 2015

Cyantraniliprole은 DuPont사에서 개발한 anthranilic diamide계 살충제로 나비목 팔랑나비과(Lepidopera), 딱정벌레목(Coleoptera), 파리목(Diptera)과 흰개미목(Isoptera)과 같은 해충에 효과가 뛰어나다. 국내의 경우 고추, 대파, 복숭아, 사과, 피망 등 15 품목에 잔류허용기준(0.2~2.0 mg/kg)이 설정되어 있어, 본 연구에서는 대파 중에 잔류할 수 있는 cyantraniliprole의 잔류분석시험법을 HPLC-VUD를 이용하여 개발하고자 하였다. Allium속에 포함되는 조미채소인 대파는 함유황 유기화합물을 가지고 있는 대표식물로 이를 제거하기 위한 전처리법 개발이 아주 중요하다. 이를 위해 함유황 유기화합물을 생성하는 allinase 효소를 불활성화시키기 위해 pH 10의 염기상태로 만들어서 효소의 활성을 감소시켜 황화합물의 생성을 감소시켰다. 확립된 시험법 검증을 위해 회수율을 측정한 결과 본 시험법의 회수율은 81.9~83.2%로 나타났으며, 분석오차는 10% 미만으로 코덱스가이드라인에 적합하였다. Cyantraniliprole의 정량한계는 0.05 mg/kg이었으며, 추가적으로 LC-MS를 통한 재확인 과정을 확립하였다. 활용될수 있다고 생각된다.

• 한국응용곤충학회지
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• 제33권3호
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• pp.153-158
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• 1994

서부호주 밀재배 지역의 Durokoppin 자연보호 구역내 흰개미(Drepanotemes tamminensis(Hill)) 집의 분포와 밀도에 있어서 토양형보다는 식물상이 주된 영향을 미치는 것으로 밝혀졌다. D. tamminensis의 집은 Woodland (우점종-Eucalyptus Capillosa)와 Casuarina (우점종-Allocasuarina campestris) 식물군에서 가장 높은 밀도를 보였다. 비록 Booram 토양형에서 개미집 밀도가 높은 경향을 보였으나, 개미집 분포에 있어서 토양형이 미치는 영향은 없었다.

• Journal of the Korean Wood Science and Technology
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• 제45권2호
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• pp.159-167
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• 2017

Historical wooden buildings in Korea are being damaged by Reticulitermes speratus kyushuensis Morimoto, a type of subterranean termite, and the scale of this damage is increasing gradually because of global warming. This study evaluated the ingestion toxicity of the phenylpyrazole insecticide fipronil to R. s. kyushuensis and its applicability as termite bait with the aim of controlling termite colonies more efficiently. An ingestion toxicity assessment was conducted and the $LT_{50}$ was determined to be 4.43 day at concentrations of 10 ppm, indicating a slow-acting effect; therefore, 10 ppm was selected as an appropriate dose. A field applicability assessment was conducted in which the number of foraging workers and the rate at which the termites fed decreased 2 weeks after baiting, and termite colony activity was no longer apparent after 4 weeks demonstrating the efficacy of fipronil at eliminating colonies. Taken together, these results, indicate that low-dose fipronil eliminated R. s. kyushuensis colonies faster than insect growth regulators; therefore, it is expected to be useful when trying to conserve historical wooden buildings.

• Journal of the Korean Wood Science and Technology
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• 제43권6호
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• pp.818-825
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• 2015

전통 목조건축물의 보존을 위해 국내 전역에 서식하는 일본흰개미 아종(Reticulitermes speratus kyushuensis)의 방제에 적합한 흰개미 예찰제어기 제형을 개발하고 실내 실험 및 현장적용성 평가를 수행하였다. 실내 실험 결과를 통해 적합한 제형을 구성하였으며, 보다 빠른 군체제거가 가능한 독먹이로써 피프로닐 0.001% (w/w)이 선정되었다. 흰개미 예찰제어기는 기존 군체제거제와 다르게 지면에 설치된 상태 그대로 흰개미 가해 여부를 육안으로 관찰할 수 있어 효율적인 모니터링이 가능하였다. 2013년 3월부터 10월까지 전남 순천 송광사 권역에서 수행된 현장적용성 평가 결과 총 367개 중 약 9.8%에 해당하는 36개에서 흰개미가 탐지되었으며, 군체제거약제 교체 후 36개 모두에서 흰개미 군체가 제거되거나 활성이 감소됨을 확인할 수 있었다.