• Title/Summary/Keyword: 노랑무당벌레

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Host plants and Biological Characteristics of Illeis koebelei Timberlake (Coleoptera: Coccinellidae: Halyziini) in Gyeonggi-do (노랑무당벌레의 발생기주 및 생물학적 특성)

  • Lee, Young Su;Jang, Myoung Jun;Lee, Jin Gu;Kim, Jun-Ran;Lee, Joon Ho
    • Korean journal of applied entomology
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    • v.54 no.4
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    • pp.295-301
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    • 2015
  • We investigated mycophagous ladybird, Illeis koebelei from 12 species of plants infected with powdery mildew in Gyeonggi-do, Korea. The pear tree, Pyrus ussuriensis var. macrostipes (Nakai), was most preferred by I. koebelei. This species was found from early July to early November in pear orchards. There was no entomophagous trace in the gut of I. koebelei without powdery mildew spores in a microscope. All stages except egg and pupa are obligate mycophagous, and the feeding potential is ranked as follows: fourth instar, adults, third instar, second instar, and first instar. Feeding amounts of each stage of I. koebelei were 45.6, 144.4, 372.2, 628.1, and $473.7mm^2$ of cucumber powdery mildew per day. Fourth instar larvae showed highest consumption of cucumber powdery mildew. Developmental periods of four larval instars and adults feeding cucumber powdery mildew were 1.2, 2.3, 2.3, 4.6, and 37.7 days, respectively, at $25^{\circ}C$. In this study, we could not determine the feeding potential of I. koebelei against the cucumber powdery mildew; therefore, and further studies are required to elucidate the potential of this species as a biological control agent, e.g., mass rearing, selection of low toxic chemical agents for Integrated Pest Management (IPM), and control techniques against powdery mildew in agro-ecosystems.

Insect Pests and Their Natural Enemies in the Controlled Agricultural Farms (시설농업지에서의 해충과 천적의 발생상)

  • Seo, Mi-ja;Ahn, Soo-jeong;Park, Deok-kee;Youn, Young-nam
    • Korean Journal of Agricultural Science
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    • v.24 no.1
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    • pp.21-28
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    • 1997
  • For the investigation of occurrence of insect pests and their natural enemies, total number of 353 controlled agricultural farms were visited and surveyed. In the 73% of total controlled agricultural farms, 52 species insect pests were occurred. Among these pests, the western flower thrip (Frankliniella occidentalis), the two spotted spider mite (Tetranychus urticae), the greenhouse whitefly (Trialeurodes vaporariorum), the cotton aphid (Aphis gossypii) and the green peach aphid (Myzus persicae) were mainly occurred. On the other hand, small numbers of natural enemies were sustained in 40 controlled agricultural farms, which was 11% and 17% of visited farms and pest occurred farms, respectively. For the most part of collected natural enemies, there were included in Braconid, Coccinellid and Anthocorid, as 63, 20 and 8% of them, respectively.

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