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http://dx.doi.org/10.5656/KSAE.2012.09.0.054

Injury Characteristics of Allium Leafminer, Acrolepiopsis sapporensis (Lepidoptera: Acrolepiidae) in Welsh Onion and Damage Assessment According to Larval Density Levels during Summer  

Park, Hong-Hyun (Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration)
Kim, Kwang-Ho (Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration)
Park, Chang-Gyu (Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration)
Choi, Yong-Seok (Bioenvironment Research Division, Chungcheongnam-do Agricultural Research & Extension Services)
Lee, Sang-Guei (Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration)
Publication Information
Korean journal of applied entomology / v.51, no.4, 2012 , pp. 383-388 More about this Journal
Abstract
This study was conducted to assess damage to the welsh onion by Acrolepiopsis sapporensis Mastumura (Lepidoptera: Acrolepiidae) during the summer season, and to estimate the economic injury level (EIL) which results, providing basic data for pest management. The adult peaks of A. sapporensis in Suwon were observed in March, April, May, and September of 2009 and 2010 through the use of pheromone traps. The feeding of A. sapporensis results in white lines on the surface, and holes within welsh onions. During the entire larval period, one larva was able to damage 1.6 leaves and punch 11.9 holes, resulting in a total damaged leaf area of $1,321.6mm^2$. Through cage experiments and larval releases, a reduction of the mean number of leaves, increased percentage of leaf damage, and reduction in gross weight and marketable weight were observed. We could obtain a regression equation that showed a clear positive correlation between pest density and percentage of damaged leaf. Using this equation, the EIL of A. sapporensis on welsh onion was calculated to one larva per 10 plants based on 7% leaf damage observed for welsh onion.
Keywords
Acrolepiopsis sapporensis; Welsh onion; Damage assessment; Economic Injury level;
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Times Cited By KSCI : 6  (Citation Analysis)
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