• Title/Summary/Keyword: bark beetle

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Differences in Ovipositional Frequency of Oak Longicorn Beetle (Moechotypa diphysis) by Oak Species Used for Lentinula edodes Cultivation Logs (표고재배용(栽培用) 참나무 원목(原木)의 수종별(樹種別) 털두꺼비하늘소의 산란빈도(産卵頻度))

  • Koo, Chang-Duck;Kim, Je-Su;Kim, Gil-Hah;Han, Gyu-Seong;Cho, Nam-Seok;Park, Jae-In;Min, Du-Sik
    • Journal of Korean Society of Forest Science
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    • v.88 no.4
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    • pp.533-540
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    • 1999
  • We observed that the thick outer bark layer of Quercus variabilis hindered oak longicorn beetle (Moechotypa diphysis) from laying its eggs in inner bark (secondary phloem tissues). The outer bark thickness of Q. variabilis was average of 7.4mm, while those of Q. mongolica. Q. serrata and Q. acutissima were average of 1.1mm, 1.3mm and 2.0mm, respectively. Inner bark thickness was 4.8mm in Q. acutissima and 3.6-3.9mm in the other oak species. The outer shape of ovipositional holes on the bark by the longicorn beetle was $8-12mm{\times}6-8mm$ wide oval in Q. variabilis, whereas $5-9mm{\times}1-5mm$ narrow fusiform in the other oak species. Oak longicorn beetle drilled average of three ovipositional holes per a 1.2m-long log in a few Q. variabilis logs and its ovipositional rate was 15%. Compared to this, the longicorn beetle preferred Q. mongolica. All the 32 investigated logs of this oak species were drilled to have 20 ovipositional holes per a log and ovipositional rate was 56%. One third of the eggs laid already hatched in early June to damage the inner bark. It seems that oak longicorn beetle prefers oak species with smooth, thin and stable outer bark surface.

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Lethal Temperature for the Black Timber Bark Beetle, Xylosandrus germanus (Coleoptera: Scolytidae) in Infested Wood Using Microwave Energy

  • Suh, Sang Jae
    • Current Research on Agriculture and Life Sciences
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    • v.32 no.3
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    • pp.131-134
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    • 2014
  • The thermal death kinetics of the Black timber bark beetle, Xylosandrus germanus, was investigated to develop a heat treatment for control of infested wood packing materials used to export goods. To determine the feasibility of microwave irradiation as an alternative control method, laboratory experiments irradiating wooden blocks of Douglas fir ($200{\times}200{\times}250mm$), which were artificially infested with adults, with 2.45 GHz of microwave energy. All (100%) Ambrosia beetle adults were killed by both hot water treatments and microwave irradiation at $52^{\circ}C$ and $58^{\circ}C$, respectively. Probit analyses estimated the internal wood temperature required to produce Probit (0.99) efficacy to be $64.7^{\circ}C$ (95% CI $62.4-69.9^{\circ}C$) at one minute after microwave treatment.

Parasitylenchus orthotomici sp. n. (Tylenchida: Allantonematidae) from Orthotomicus angulatus (Coleoptera: Scolytidae), with Note on Parasitism (소나무뿔나무좀(Orthotomicus angulatus) (딱정벌레목 : 나무좀과)에서 발견된 천적선충 신종과 기생율)

  • ;Harry K. Kaya;Patrick Shea
    • Korean journal of applied entomology
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    • v.28 no.1
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    • pp.1-3
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    • 1989
  • Parasitylenchus orthotomici sp. n. is described as a nematode parasite of Orthotomicus an¬gulatus in Korea. In a sample of 170 beetles randomly collected from Pinus densiflora S. et. Z, 51. 8% were parasitized by nematodes. The number of nematodes per bark beetle was ranged from 1 to 97. The parasitisms of F, generation were ranged from 43.2% to 52%. There was no positive tendency in nematode parasitism between sun-side and shade-side.

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Secondary Damage and Adult Emergence of Pine Bark Beetle (Blastophagus piniperda) in Tended Forests (숲 가꾸기 임지의 소나무좀 발생과 후식 피해)

  • Goo Kwan-Hyo;Lee Jeong-Hwan;Kim Jong-Kab
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.7 no.4
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    • pp.258-264
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    • 2005
  • The objectives of this study were to study 1) emergence of pine bark beetles, 2) larval density in residual timber on Idlest land by each felling season, and 3) the secondary damage rates in the tended forest. Pine forest land which had undergone tending had a higher secondary damage ratio $(59.6\%)$ by pine bark beetles than forest land that was not tended $(2.8\%)$. The number of escape holes averaged 11.3 0.31 per $250 cm^2$ on the bark of leaf trees in the tended forest. The number of escape holes was higher in the Jinju site than in the Hamyang site. The larval habitat density of pine bark beetles as compared with each felling period was higher after mid-October than in forests tended early in October. Thus, forests should be tended before early October in order to prevent secondary damage from pine bark beetles. Secondary damage in the tended forest was higher in the upper part $(75.5\%)$ of the tree crown than in the lower part $(49.2\%)$. The damage was higher in terminal shoots $(80\%)$ than in lateral shoots $(48\%)$. Therefore, secondary damage by pine bark beetles can cause deterioration of the elongation growth of the forest trees. In conclusion, if by-products of tended pine forest forests are neglected, they will be utilized as a propagation site for pine bark beetles (Blastophagus piniperda L). The propagated adults will damage the tender shoots of the leaf trees and thus seriously limittheir elongation.

Biology of Platydema nigroaeneum Motschulsky (Coleoptera: Tenebrionidae) from Korea: Life History and Fungal Hosts

  • Jung, Boo-Hee;Kim, Jin-Ill
    • Journal of Ecology and Environment
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    • v.31 no.3
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    • pp.249-253
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    • 2008
  • We conducted field and laboratory observations of the life histories and fungal hosts of the darkling beetle, Platydema nigroaeneum Motschulsky. P. nigroaeneum, a fungivorous tenebrionid beetle, was a widespread inhabitant of fungi on deciduous trees (Quercus, Salix, Alnus and Carpinus etc.) in Korea. Development from egg to adulthood took $4\sim11$ months in nature and about 66 days in the laboratory at $25.5{\sim}26.1^{\circ}C$ and $63.5\sim64.5%$ relative humidity. Both larvae and adults overwintered in their host fungi or beneath the bark of the host tree near the host fungi. Sporophores of Coriolus $Qu{\acute{e}}let$, Bjerkandera Karst., Daedaleopsis Schroet. and Merulius were common feeding and breeding sites in Korea.

Mariannaea samuelsii Isolated from a Bark Beetle-Infested Elm Tree in Korea

  • Tang, Longqing;Hyun, Min-Woo;Yun, Yeo-Hong;Suh, Dong-Yeon;Kim, Seong-Hwan;Sung, Gi-Ho;Choi, Hyung-Kyoon
    • Mycobiology
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    • v.40 no.2
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    • pp.94-99
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    • 2012
  • During an investigation of fungi from an elm tree infested with bark beetles in Korea, one isolate, DUCC401, was isolated from elm wood. Based on morphological characteristics and phylogenetic analysis of the internal transcribed spacer and 28S rDNA (large subunit) sequences, the isolate, DUCC401, was identified as Mariannaea samuelsii. Mycelia of the fungus grew faster on malt extract agar than on potato dextrose agar and oatmeal agar media. Temperature and pH for optimal growth of fungal mycelia were 25oC and pH 7.0, respectively. The fungus demonstrated the capacity to degrade cellobiose, starch, and xylan. This is the first report on isolation of Mariannaea samuelsii in Korea.

A Study on the Community of Xylophagous Beetles in Korean White Pine, Pinus koraiensis, Forests (잣나무림에서 천공성 딱정벌레 군집에 관한 연구)

  • Choi, Won IL;Kim, Kyung-Min;Koh, Sang-Hyun;Nam, Youngwoo
    • Korean journal of applied entomology
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    • v.56 no.1
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    • pp.41-49
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    • 2017
  • The community of xylophagous beetles belonging to Cerambycidae, Curculionidae and Scolytinae in Korean white pine, Pinus koraiensis Siebold & Zuccarini, forests was surveyed using Malaise traps in 2007. A total of 1,615 xylophagous beetles were collected, including 184 cerambycids from 15 species, 185 curculionids from 17 species, and 1,246 scolytid beetles from 6 species, of which the dominant species was the ambrosia beetle Xyleborus mutilatus Blandford. Ranked by order of population size, the wood-boring and bark beetle community in Korean white pine showed high dominance by one species of Scolytinae, suggesting the community had low biological diversity. Thinning in Korean white pine forests influenced on the abundance of bark and ambrosia beetles, whose populations in particular stands increased 1 year after thinning, and then decreased the following year.