- Volume 17 Issue 4
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Occurrence of Insect Pests and Natural Enemies in Pear Orchard with Hairy Vetch
헤어리베치 재배과원에서 해충과 천적의 발생
- Choi, Yong-Seok (Chungcheongnam-do Agricultural Research & Extension Services Yesan) ;
- Whang, In-Su (Chungcheongnam-do Agricultural Research & Extension Services Yesan) ;
- Park, Deog-Kee (Chungcheongnam-do Agricultural Research & Extension Services Yesan) ;
- Choe, Gwang-Ryul (Department of Applied Biology, Chungnam National Univ.)
- Received : 2013.11.05
- Accepted : 2013.12.05
- Published : 2013.12.31
We investigated the occurrence of major pests, 4 species of moths (Grapholita dimorpha Busck, Carposina sasakii Matsumura, Archips breviplicanus Walsingham, Adoxophyes orana Fischer von Roslerstamm), apple aphid (Aphis spiraecola Patch), two spotted spider mite (Tetranychus urticae Koch) and parasitoids in pear orchard with hairy vetch and cutting weeds in Yesan, Chungnam province during the flowering season and summer depression season of hairy vetch, in 2012 and 2013. The occurrence of 4 species of moths in hairy vetch plot and cutting weeds (major is finger grass, Digitaria sanguinalis, 80%) were little different but in case of apple aphid, the density in hairy vetch plot was just 95 aphids per stem at 20th June but low after then. The density of two spotted spider mite on pear leaf in hairy vetch plot was lower than in cutting weeds plot significantly. The number of parasitoids collected in hairy vetch plot during flowering season (May and June) were 398 and 798 in 2012 and 2013, respectively. The number of parasitoids collected in hairy vetch plot during summer depression season (July and August) were 114 and 172, respectively. But in cutting weeds plot, 9 and 22 in May and June, 8 and 5 in July and August. We didn't know either hairy vetch in pear orchard affected the occurrence of 4 species of moths, apple aphid and two spotted spider mite or not but was acted to be favorable for wasps, the natural enemies on the contrary. The improvement of chemical control systems through the selection of low chemicals to natural enemies with cover and green manure plants would turn effective pest management into a possibility.
Supported by : 국립식량과학원
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