• 제목/요약/키워드: forest insect pests

검색결과 210건 처리시간 0.023초

농림해충에 대한 곤충병원성 선충의 병원성 (Pathogenicity of Entomopathogenic Nematodes to Some Agro-Forest Insect Pests)

  • 이상명;이동운;추호렬;김도완;김준범
    • 한국토양동물학회지
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    • 제2권2호
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    • pp.76-82
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    • 1997
  • Mortality of some agro-forest insect pests, Agrotis segetum, Blitopertha orientalis, Agerastica coerulea, Glyphodes perspectalis and Acantholyda parki caused by entomopathogenic nematodes was investigated in laboratory and in pot. Steinernema carpocapsae All and Pocheon strain were effective against 2nd of 3rd instar larvae of A. segetum showing 100% mortalities at the concentration of 10Ijs/larva but not effective against 4th inster larvae. Mortality of B. orientalis was 100% after 26 days in H. bacteriopora NC 1, H. bacteriophora Hamyang and S. glageri NC strain treatment. S. monticulum also showed 100% mortalities against A. coerulea andd G. perspectalis at the concentration of 80 and 40 Ijs/larva. However, H. bacteriophora Cheju and S. glaseri Cheju strain were not effective against A. parki, i.e., showing 23.3 and 20.0% mortalities, respectively at the concentration of 160Ijs/larva. S. glaseri Hanrim strain was more effective than H. bacteriophora Cheju strain against Pryeria sinica.

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팽나무 뒷면흰가루병을 일으키는 병원균 Pleochaeta shiraiana의 존재 확인 (Confirmation of the Presence of Pleochaeta shiraiana Associated with Powdery Mildew of Celtis sinensis in Korea)

  • 이승규;이상현;조성은;박지현;신현동
    • 식물병연구
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    • 제17권3호
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    • pp.391-395
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    • 2011
  • 지금까지 우리나라에서 팽나무 뒷면흰가루병 및 병원균 Pleochaeta shiraiana의 존재에 대하여 확실하게 알려지지 않았으므로 이를 확인하기 위하여 고려대학교 표본실에 보존된 9개 시료를 대상으로 병원균의 무성세대와 유성세대의 형태적 특징을 현미경으로 관찰하고 기록하였다. 또한 4개 시료에서 획득한 ITS 염기서열을 일본의 2개 시료에서 알려진 자료와 비교하여 99% 이상의 상동성을 확인하였다. 이로써 P. shiraiana에 의한 뒷면흰가루병이 우리나라에서 발생함을 확인할 수 있었다.

In Vivo Antifungal Activities of 67 Plant Fruit Extracts Against Six Plant Pathogenic Fungi

  • Choi Gyung-Ja;Kim Jin-Cheol;Jang Kyoung-Soo;Lim He-Kyoung;Park Il-Kwon;Shin Sang-Chul;Cho Kwang-Yun
    • Journal of Microbiology and Biotechnology
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    • 제16권3호
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    • pp.491-495
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    • 2006
  • Methanol extracts of fruits of 67 plants were screened for in vivo antifungal activity against Magnaporthe grisea, Corticium sasaki, Botrytis cinerea, Phytophthora infestans, Puccinia recondita, and Blumeria graminis f. sp. hordei. Among them, 13 plant extracts ($3,000\;{\mu}g/ml$) showed more than 90% disease-control efficacy against at least one of six plant diseases. Specifically, the extracts of Aleurites fordii, Angelica dahurica, Camellia japonica, Chamaecyparis pisifera, Pittosporum tobira, and Styrax japonica controlled more than 90% of the development of rice blast at $1,000{\mu}g/ml$. Extracts of both S. japonica and A. dahurica fruits at $333{\mu}g/ml$ concentration displayed strong antifungal activity against M. grisea on rice seedlings.

The Effect of Raffaelea quercus-mongolicae Inoculations on the Formation of Non-conductive Sapwood of Quercus mongolica

  • Torii, Masato;Matsuda, Yosuke;Seo, Sang Tae;Kim, Kyung Hee;Ito, Shin-Ichiro;Moon, Myung Jin;Kim, Seong Hwan;Yamada, Toshihiro
    • Mycobiology
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    • 제42권2호
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    • pp.210-214
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    • 2014
  • In Korea, mass mortality of Quercus mongolica trees has become obvious since 2004. Raffaelea quercus-mongolicae is believed to be a causal fungus contributing the mortality. To evaluate the pathogenicity of the fungus to the trees, the fungus was multiple- and single-inoculated to the seedlings and twigs of the mature trees, respectively. In both the inoculations, the fungus was reisolated from more than 50% of inoculated twigs and seedlings. In the single inoculations, proportions of the transverse area of non-conductive sapwood at inoculation points and vertical lengths of discoloration expanded from the points were significantly different between the inoculation treatment and the control. In the multiple inoculations, no mortality was confirmed among the seedlings examined. These results showed that R. quercus-mongolicae can colonize sapwood, contribute to sapwood discoloration and disrupt sap flows around inoculation sites of Q. mongolica, although the pathogenicity of the fungus was not proven.

Two New Records of Scleroderma Species (Sclerodermataceae, Boletales) in South Korea

  • Sung-Eun Cho;Young-Nam Kwag;Sang-Kuk Han;Dong-Hyeon Lee;Chang Sun Kim
    • 한국균학회지
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    • 제50권2호
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    • pp.115-123
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    • 2022
  • Two new records of Scleroderma species from South Korea are described here. Comprehensive taxonomic studies of Scleroderma specimens were conducted at the Korea National Arboretum. Based on morphological and molecular data (fungal barcode sequences), two new records (S. laeve and S. nastii) were confirmed. Herein, morphological descriptions, including Scanning Electron Microscope (SEM) images of basidiospore ornamentation, and a taxonomic key of Korean Scleroderma species are provided.

한국산 오갈피나무이(매미목: 창나무이과)의 생태 특성 (Ecological Characteristics of Trioza ukogi (Shinji) (Homoptera: Triozidae) in Korea)

  • 원대성;박일권;김철수;신상철;김종국
    • 한국산림과학회지
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    • 제96권6호
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    • pp.750-755
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    • 2007
  • 본 연구는 2004년-2005년 민가시오갈피나무를 가해하는 오갈피나무이의 생태적 특성을 구명하기 위해 수행되었다. 알의 형태는 촛불모양이며 길이는 $0.40{\pm}0.03mm$이다. 약충은 5령기를 거치며 1령 약충의 체장은 $0.36{\pm}0.03mm$, 종령약충의 체장은 $2.50{\pm}0.25mm$이다. 1년에 2세대를 경과하며, 제 1세대 성충의 우화기간은 7월 중순부터 8윌 상순까지였고, 최성기는 7월 하순 이었다. 제 2세대 성충의 우화기간은 9월 중순부터 10월 상순까지였고, 최성기는 9월 하순 이었다. 월동한 성충은 4월 상순부터 5월 하순까지 월동처에서 오갈피나무의 잎이나 줄기로 이동하기 시작하였고, 이동 최성기는 4월 히순 이었다. 월동성충(♀)은 민가시오갈피나무의 개엽된 잎이나 새로 성장한 줄기를 선호하며, 제 1세대 성충은 종실이 형성되기 시작할 때 주로 종실사이에 산란하나 일부는 가지에도 산란하였다. 성충의 포란수는 $57.5{\pm}23$개 이었다.