• 대한화학회지
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• 제64권4호
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• pp.236-238
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• 2020

• 한국산림과학회지
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• 제88권4호
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• pp.533-540
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• 1999

표고 재배용 참나무류 중에서 굴참나무는 수피가 두꺼워서 참나무의 내수피 (2차 사부조직)에 알을 낳는 털두꺼비하늘소(Moechotypa diphysis)의 산란을 어렵게 하였다. 굴참나무의 수피 두께는 평균 7.4 mm로서 다른 참나무 수종(신갈은 평균 1.1mm, 졸참은 1.3mm, 상수리는 2.0mm) 보다 3-7배나 두꺼웠다. 내수피의 두께는 상수리가 4.8mm로 가장 두껍고 다른 수종은 3.6-3.9mm 였다. 털두꺼비하늘소가 원목의 수피에 뚫은 산란공의 외부형태는 굴참나무에서 $8-12mm{\times}6-8mm$ 크기의 넓은 타원형이었으며, 다른 3수종에서는 $5-9mm{\times}1-5mm$로 좁은 타원형이었다. 털두꺼비하늘소는 굴참나무 조사목 중 9%의 원목(1.2m 길이)에 원목당 평균 3개의 산란공을 뚫었으며, 실제로 산란공에 알이 있는 비율은 15%였다. 반면에 이 하늘소가 선호하여 산란하는 수종은 신갈나무로서 조사된 원목 32개의 전부에 산란공을 뚫었으며, 원목당 산란공 수는 평균 20개, 그 산란공에 알이 있는 빈도는 56%였고, 이 중에서 35%가 6월초에 이미 부화하여 유충이 내수피를 가해하고 있었다. 털두꺼비하늘소가 산란하는데 선호하는 참나무 수종은 수피가 매끈하고 표피가 잘 벗겨지지 않는 얇은 것으로 생각된다.

• 한국연초학회지
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• 제18권1호
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• pp.30-38
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• 1996

Meiotic metaphase chromosomes of the testis of two storage insects, tobacco moth (Ephestia elutella H.) and cigarette beetle (Lasioderma serricorne F.) were examined to study their karyotypes. The number of haploid chromosomes of the tobacco moth was 31 and the karyotype was characterized by 29 metacentric and 2 submetacentric chromosomes. The metaphase chromosome length of tobacco moth ranged ca. 1.44-2.11${\mu}{\textrm}{m}$ and the average length was 1, 78${\mu}{\textrm}{m}$. The number of haploid chromosomes of the cigarette beetle at metaphase was 10 and the karyotype was characterized by 8 metacentric and 2 submetacentric chromosomes. The range of metaphase chromosome length of the cigarette beetle was ca. 1.79- 2.39${\mu}{\textrm}{m}$ and the average length 2.09${\mu}{\textrm}{m}$.

• 한국잠사곤충학회지
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• 제39권2호
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• pp.174-179
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• 1997

The larval head capsule width, larval weight and length of mulberry longicorn beetle, Apriona germari Hope were measured when the larvae were exuviated in artificial diet rearing. The larval head capsule width from the 1st to the 12th instar was ranged from 0.12 to 0.69 cm, and growth ratio of each instar was significantly high between the 1st and the 2nd instars. The fitness to Dyar's law for the larval head capsule width was 87.6%. When the logarithum of the larval head capsule width is plotted against the number of instars, the calculated regression line was LogY=0.12086+0.06998X and Dyar's constant was 1.18. The larval weight was increased with larval developmental stages, and the coefficient of variation of larval weight was apparently high. But the calculated regression line was LogY=-0.91592+0.25959X and Dyar's constant was 1.25. The growth ration of the larval length was clearly high between the 2nd and the 3rd instars, and that of larvae from the 4th instar was decreased. The calculated regression line was LogY=-0.16932+0.09841X and Dyar's constant was 1.25. In conclusion, our results suggested that the larvae growth of mulberry longicorn beetle appeared to be highly related in the larval head capsule width, larval weight and length.

• Journal of Forest and Environmental Science
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• 제33권3호
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• pp.161-171
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• 2017

Global environmental changes have the capacity to make dramatic alterations to floral and faunal composition, and elucidation of the mechanism is important for predicting its outcomes. Studies on global climate change have traditionally focused on statistical summaries within relatively wide scales of spatial and temporal changes, and less attention has been paid to variability in microclimates across spatial and temporal scales. Microclimate is a suite of climatic conditions measured in local areas near the earth's surface. Environmental variables in microclimatic scale can be critical for the ecology of organisms inhabiting there. Here we examine the effect of spatial and temporal changes in microclimates on those of carabid beetle communities in Hyangnobong, Korea. We found that climatic variables and the patterns of annual changes in carabid beetle communities differed among sites even within the single mountain system. Our results indicate the importance of temporal survey of communities at local scales, which is expected to reveal an additional fraction of variation in communities and underlying processes that has been overlooked in studies of global community patterns and changes.

• Applied Biological Chemistry
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• 제32권1호
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• pp.57-63
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• 1989

담배저장해충은 숙성된 엽연초에 가장 심각한 해를 끼치는 것으로 알려져 있다. 이 해충의 성유인 물질들 중에서 serricornin이 가장 강한 생리활성을 보여주고 다른 유인물질들은 교접시 이것에 대한 보조역할을 한다. 분광학적인 증거와 합성에 관한 연구로부터 이 화합물의 구조는 (4S,6S,7S)-4,6-dimethyl-7-hydroxynonan-3-one임이 밝혀졌다. 담배저장 해충으로부터 얻어진 성유인 물질들은 모두 polyketide 생합성의 과정에서 생성된다고 제안되었다. 두 가지 nonasymmetric 합성과 열가지 asymmetric 합성이 상세하게 고찰되었다.

• Natural Product Sciences
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• 제23권4호
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• pp.235-238
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• 2017

Colorado potato beetle is a most destructive insect pest of potato throughout the world. Although utilization of chemical insecticides is a main method for management of this pest, their negative side-effects such as threat to humans and the environmental pollution prompted researchers to search for natural alternatives. Recently plant essential oils with low or without side-effects against noun-targeted organisms and with high availability were considered as safe bio-pesticides. In the present study, toxicity of essential oil of Iranian lemongrass, Cymbopogon citratus Stapf, was evaluated against 3th instar larvae and adults of Colorado potato beetle by a leaf dipping method. Results displayed essential oil had notable toxicity against both larvae and adults after 24 and 48 h exposure times. Probit analysis revealed $LC_{50}$ values (lethal concentration to kill 50% of population) with 95% confidence limits were 10.32 (9.17 - 11.72) and 7.76 (6.80 - 8.74) ${\mu}l/ml$ for larvae and 6.27 (4.82 - 8.15) and 4.35 (3.24 - 5.62) ${\mu}l/ml$ for adults after 24 and 48 h, respectively. Based on regression analysis, a positive correlation between log concentration of essential oil and insect mortality was achieved. Results indicated C. citratus essential oil can be candidate as a natural alternative to the harmful chemical insecticides in the management of Colorado potato beetle.

• Animal cells and systems
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• 제12권2호
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• pp.101-108
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• 2008

Recently, Platypus koryoensis has been reported as a major pest of oak trees in Korea which can introduce the pathogenic fungus(Raffaelea sp.) by making galleries into the heartwood of the tree. As the beetle has developed its effective drilling mouthpart enough to make tunnels, we have analyzed the fine structural aspects of the mouthpart using the field emission scanning electron microscopy(FESEM) to reveal its mechano-dynamic characteristics. The mouthparts of this ambrosia beetle which consist of a labrum, a pair of mandibles, a pair of maxillae and the labium exhibit typical morphology of mycophagous coleopteran beetles and have those characteristics of chewing mouthparts that can excavate galleries in the hardwood. Both of maxillary and labial palpi have the functions of direct the food to the mouth and hold it while the mandibles chew the food. The distal ends of these palpi are flattened and have shovel-like setae. Females have larger maxillary palpi and a larger gular region than males in general.

• Journal of Forest and Environmental Science
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• 제29권3호
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• pp.211-218
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• 2013

This study was conducted to examine the community structure of ground beetles between coniferous- and deciduous-dominant forest in agricultural landscapes, in Miryang-si, Yeongdong-gun, Icheon-si, and Cheolwon-gun during April to October in 2009. A total of 19 species belonging to 15 genera of 9 subfamilies were identified from 6,253 collected ground beetles. Dominant species from 4 regions were Synuchus nitidus (3,715 individuals, 59.4% of total) and Synuchus cyloderus (1,783 individuals, 28.5%) respectively. Non-metric multidimensional scaling based on Bray-Curtis similarity showed that ground beetle assemblage was not different between forest stands, but it was significantly different among regions. Overall, forest stands of secondary forests may not show a different community structure of ground beetle assemblages in our study. However, monitoring on the ground beetle fauna as well as other arthropods of secondary forests in agricultural landscapes is still important for the management and conservation of biodiversity, because forests provides important habitats for many predatory arthropods, such as ground beetles, spiders and rove beetles.

• International Journal of Industrial Entomology and Biomaterials
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• 제2권1호
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• pp.37-53
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• 2001

Two regions of mtDNA genome, cytochrome oxidase subunit I (COI) and 165 ribosomal RNA (165 rRNA) genes, were sequenced for 15 species of the long-horned beetle belonging to four subfamilies and geographic samples of mulberry longicorn beetle, Apriona germari, from two localities in Korea. Ten samples of A. germari collected from Suwon and Busan revealed three COI haplotypes ranging in nucleotide divergence of 0.3% to 0.5%, and the two populations shared one common COI haplotype (80%). The sequence divergence among 15 species of the long-horned beetle was much higher in COI gene (12.3%∼39.4%) than 16S rRNA gene (7.2% to 23.1), and the maximum value in the COI gene is exceptional compared with other relevant studies, including that of Coleoptera. The greatly increased divergence in the COI gene, in facto was stemmed from a peculiar sequence of Prionus insularis belonging to Prioninne, divergence of which ranges from 31.2% to 39.3% from other species. We discussed possible reason of the divergence in this species. Due to the abnormality of COI gene divergence, decrease in phylogenetic signal was severe in COI nucleotide and, subsequently, the converted amino acid sequences, rendering us to put more confidence on the 16S5 rRNA gene data. Although the molecular phylogeny confidently supports the monophyletic origin of Lepturinae, the presence of discrepancy between molecular data and traditional taxonomic views also is a testable hyothesis. One such discrepancy includes taxonomic position of Sophronica obrioides and Theophilea cylindricollis belonging to Lamiinae.