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线虫是危害作物的主要病原。据美国农业部估计线虫对作物危害造成的损失可达10％以上。近年来,在线虫种类、分布及危害等方面国内外都做了大量工作,巳报道的寄生线虫近2Q00种,有20余种具重要经济价值的病毒是由线虫传播的。线虫危害的广泛性和严重性已引起世界上植物病理学家的注目。 (一)我国分布的主要线虫种类近年国内发现对农业生产有较大危害的线虫病害计37种,其中28种是新发现的,涉及病原线虫共26种(刘存信1987)。
Nematodes are the main pathogen that endanger crops. According to USDA estimates, the damage caused by nematodes to crops can amount to more than 10%. In recent years, a great deal of work has been done at home and abroad on the species, distribution and harm of nematodes. There are nearly 2Q00 parasitic nematodes reported, and more than 20 kinds of viruses with important economic value are transmitted by nematodes. The widespread and serious nature of nematode hazards has drawn the attention of plant pathologists worldwide. (I) The main species of nematodes distributed in China In recent years, 37 species of nematode diseases, which are found to be more harmful to agricultural production in China, of which 28 were newly discovered and involved 26 species of pathogenic nematodes (Liu Cunxin 1987).