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Rice root nematodes, Hirschmanniella spp. parasitize in the roots of rice and water plantspread widely. Ten species of the genus Hirschmanniella Luc et Goody, 1964 (Nemata:Pratylenchidae) collected from the root of rice in Yunnan Province are reported. They areH. belli, H. caudacrena, H. diversa, H. gracilis, H. imamuri, H. mexicana, H. microtyla,H. mucronata, H. oryzae and H. spinicaudata, including seven species of importantpathogenic nematodes of rice and two dominant species H. oryzae and H. imamari. Generally,the trend of species composition pattern is H. oryzae and H. imamari, which is a commoncomposition pattern in the world, but the species composition mode varies with thedifference of altitude and latitude. Their distribution relates to altitude and latitudeclosely, and also to the type of rice, such as indica or japonica rice.
Rice root nematodes, Hirschmanniella spp. Parasitize in the roots of rice and water plants widely spread. Ten species of the genus Hirschmanniella Luc et Goody, 1964 (Nemata: Pratylenchidae) collected from the root of rice in Yunnan Province are reported. They areH. Belli , H. caudacrena, H. diversa, H. gracilis, H. imamuri, H. mexicana, H. microtyla, H. mucronata, H. oryzae and H. spinicaudata, including seven species of importantpathogenic nematodes of rice and two dominant species H . oryzae and H. imamari. Generally, the trend of species composition pattern is H. oryzae and H. imamari, which is a commoncomposition pattern in the world, but the species composition mode varies with thedifference of altitude and latitude. Their distribution related to altitude and latitudeclosely, and also to the type of rice, such as indica or japonica rice.