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http://dx.doi.org/10.5656/KSAE.2007.46.2.193

Degree of Injury Caused by Larva of Pyrausta panopealis Walker (Lepidoptera: Pyralidae) in Green Perilla Polyvinyl House at Chungnam Province  

Choi, Yong-Seok (Bioenvironment Research Division, Chungnam Agricultural Research & Extention Services Yesan)
Park, Deok-Gi (Byeinsect Co. LTD., Kongju National Univ.)
Kim, Byung-Ryun (Bioenvironment Research Division, Chungnam Agricultural Research & Extention Services Yesan)
Han, Kwang-Seop (Bioenvironment Research Division, Chungnam Agricultural Research & Extention Services Yesan)
Youn, Young-Nam (Department of Applied Biology, Chungnam National Univ.)
Choe, Kwang-Ryul (Department of Applied Biology, Chungnam National Univ.)
Publication Information
Korean journal of applied entomology / v.46, no.2, 2007 , pp. 193-199 More about this Journal
Abstract
This study was conducted to explain degree of injury caused by P. panopealis larva which is the key component to develop economic injury level or control threshold in green perilla and was carried out in polyvinyl houses at Yuseong Daejeon, Geumsan and Yesan Chungnam from 2004 to 2006. Of 5 major pests in green perilla polyvinyl house, P. panopealis larva injured green perilla leaf by 48.5% on average under no insecticides application. The peak occurrence of P. panopealis adult was early August and late September in 2004 and 2005 studies. The feeding amount of P. panopealis larva among 1st to 3rd instar was not different, but from the 4th instar the feeding amount greatly increased and this result was consistent with daily feeding experiment in which the amount greatly increased from seventh day. The degree of injury which was investigated with different larval infestation levels showed that the degree of injury increased a little but was not dim ε rent significantly as the density increased. The density of P. panopealis larva in damaged green perilla plant was less than three individuals/plant. This result indicates that P. panopealis adult lays egg on green perilla leaf dispersedly and larva hatched from egg injures only the leaf which egg is layed. These preliminary data seems to be very useful to design economic injury level and control threshold studies for P. panopealis in green perilla polyvinyl house.
Keywords
Pyrausta panopealis; Green perilla; Feeding amount; Degree of Injury;
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Times Cited By KSCI : 2  (Citation Analysis)
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