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Biological Characteristics of Rhynchaenus sanguinipes (Coleoptera: Curculionidae) and Control Effects of some Insecticides  

Kim, Chul-Su (Southern Forest Research Center, Korea Forest Research Institute)
Kim, Jong-Kuk (Department of Forest Resources Protection, Kangwon National University)
Shin, Sang-Chul (Division of Forest Insect Pests and Diseases, Korea Forest Research Institute)
Choi, Kwang-Sik (Division of Forest Insect Pests and Diseases, Korea Forest Research Institute)
Jeon, Mun-Jang (Department of Forest Resources, College of Life and Environment, Daegu University)
Park, Il-Kwon (Division of Forest Insect Pests and Diseases, Korea Forest Research Institute)
Publication Information
Korean journal of applied entomology / v.45, no.2, 2006 , pp. 195-200 More about this Journal
Abstract
This study was carried out to clarify the biologies and morphological characteristics of Rhynchaenus sanguinipes. Also some chemicals were tested to screen the effective insecticide for the control of the species. Up to date, Zelkova serrata has been hewn as host plant of Rhynchaenus sanguinipes, which shows serious damage in this country. In the present study, Ulmus pumila was first found as host plant in this study. Body lengths of larvae, pupa and adult were 4.53$\pm$0.30 mm, 3.30$\pm$0.42 mm and 2.96$\pm$0.12 mm, respectively. The overwintered adult of the species emerged on early April to late April, and adult of nekt generation emerged on early May to late May, Pupal periods were 10, 7.2, 5.1 and 4 days on 16, 20, 24 and 28$^{\circ}C$, respectively. The lower developmental threshold temperature was 5.8$^{\circ}C$. Four braconid parasitoids were found as natural enemies, which emerged mainly on late April to early June. Insecticidal activities with treatments of fenitrothion 50% EC, indoxacarb 30% WG, ethofenprox 20% EC and thiacloprid 10% SC was investigated against adult of R. sanguinpes, and they showed >90% mortality.
Keywords
Rhynchaenus sanguinipes; Zelkova serrata; seasonal occurrence; natural enemy; insecticides;
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