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http://dx.doi.org/10.5656/KSAE.2010.49.4.357

Injury of Full Seed Stage Soybeans by The Bean Bug, Riptortus pedestris  

Jung, Jin-Kyo (National Institute of Crop Science)
Seo, Bo-Yoon (National Institute of Crop Science)
Youn, Jong-Tag (Rural Development Administration)
Park, Jong-Ho (National Academy Agricultural Science)
Cho, Jum-Rae (National Academy Agricultural Science)
Publication Information
Korean journal of applied entomology / v.49, no.4, 2010 , pp. 357-362 More about this Journal
Abstract
Soybean seed injury was analyzed in the experiments in which the bean bug, Riptortus pedestris(Hemiptera: Alydidae), was released into screen-caged pots containing full seed stage(R6) of soybean. When the different stages of insects, from the 3rd instar nymphs to adults, were released into pots during 8 days in soybean R6 stage, soybean seeds with injury marks (B-type seeds) increased. The weight reduction ratio in B-type seeds was highest in the injury by the 5th instar nymphs, while the daily-produced number ratio of B-type seeds was small in the treatment. In the injury by the different number of adult released into pots, 4, 8, 16 adults caused a significant increase of B-type seeds, while 16 adults caused the significant increase of the deformed (C-type) seeds. In the injury by the different release period of adults, the total number of pods was not significantly different among treatments, while the total seed number harvested was significantly small in the release for 48 days. The release for 8 and 16 days caused a significant increase of B-type seeds, while the release for 48 days caused the increase of C-type seeds. The results indicated that injury of soybean R6 stage by the bean bug produced soybean seeds with distinct injury marks at relatively low density and during short term attack period, while it produced deformed seeds at high density and during long attack period.
Keywords
Soybean; Full seed stage; Riptortus pedestris; Innoculation; Seed injury;
Citations & Related Records
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