Plant Parasitic Nematodes in Soybean in Korea and Their Importance Rating
2013
Kim, D.K., Organic Agriculture Research Institute, Uiseong, Republic of Korea | Choi, I.S., Pusan National University, Miryang, Gyeongnam | Ryu, Y.H., Organic Agriculture Research Institute, Uiseong, Republic of Korea | Huh, C.S., Organic Agriculture Research Institute, Uiseong, Republic of Korea | Lee, Y.S., Kangwon National University, Chuncheon, Republic of Korea 200-701
Plant parasitic nematodes were isolated from 274 soil samples collected from soybean fields in Korea. Nematode importance rating in soybean is proposed based on this study and by reviewing other reports. Soybean cyst nematode, Heterodera glycines is the most important nematode species and rated as 1 st because it detected from 38%(range 25-51%) of soil samples with high density except Jeju province. Root-knot nematode, Meloidogyne spp. is rated 2 nd and is more widely distributed in southern provinces, Gyeongnam, Jeonnam, and Jeju province (detection rate ranged 16-44%). Pratylenchus is rated 3 rd and is more frequently detected from northern provinces such as Gyeonggi and Gangwon (detection rate ranged 10-13%). Helicotylenchus is rated 4 th and is particularly important in Jeju province (detection rate is 62% and numbers averaged 571 nematodes/300cm 3 soil), which is the main production area for sprouting soybean in Korea. Tylenchorhynchus, Paratylenchus, Criconema, Criconemoide, Mesocriconema, Ogma, Xiphinema, Paratrichodorus, and Trichodorus occur in low frequency and density, thus they are rated to 5 th . We propose to delete following nematode genus from the list of soybean parasitic nematode in Korea because their parasitism on soybean is unconfirmed or negligible; Tylenchus, Aphelenchus, Aphelenchoides, Ditylenchus, Hirschmanniella immamuri, Basiria graminophila, Psilenchus, and Pseudhalenchus. Therefore, we revised 30 species in 16 genera as soybean parasitic nematodes in Korea. Importance rating is 1 st Heterodera glycines, 2 nd Meloidogyne spp., 3 rd Pratylenchus spp. and 4 th Helicotylenchus spp. especially in Jeju province.
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