| Abstract: | Rice root nematodes, Hirschmanniella spp. parasitize in the roots of rice and water plant spread 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 are H. belli, H. caudacrena, H. diversa, H. gracilis, H. imamuri, H. mexicana, H. microtyla,H. mucronata, H. oryzae and H. spinicaudata, including seven species of important pathogenic 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 common composition pattern in the world, but the species composition mode varies with the difference of altitude and latitude. Their distribution relates to altitude and latitude closely, and also to the type of rice, such as indica or japonica rice. |
