Abstract
Among important nematode species occurring in Japan, current research achievements with the following four nematodes are reviewed: 1) Soybean cyst nematode (SCN), Heterodera glycines - breeding for resistance, race determination, association with Cephalosporium gregatum in azuki bean disease, and isolation of hatching stimulant. 2) Potato-cyst nematode (PCN), Globodera rostochiensis - pathotype determination (Ro 1), breeding for resistance, and control recommendations. 3) Pinewood nematode (PWN), Bursaphelenchus xylophilus - primary pathogen in pine wilt disease, life cycle exhibiting a typical symbiosis with Japanese pine sawyer, Monochamus alternatus, and project for control. 4) Rice root nematodes (RRN), Hirschmanniella imamuri and H. oryzae - distribution of species, population levels in roots, and role of these nematodes in rice culture.
Keywords: Bursaphelenchus xylophilus, Globodera rostochiensis, glycinoeclepin A, hatch stimulant, Heterodera glycines, Hirschmanniella imamuri, Hirschmanniella oryzae, Japanese pine sawyer, Monochamus alternatus, pathotype, pine wilt disease, pinewood nematode, potato-cyst nematode, rice root nematode, soybean cyst nematode, symbiosis
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