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随着耕作制度的改革和大棚蔬菜的大面积推广,植物病原线虫对蔬菜的为害日趋加重,由于保护地整年的田间小气候都适宜于线虫的活动和繁殖,且有充足的寄主植物,致使保护地蔬菜线虫为害严重,1991～1992年在洪凝镇、山阳乡大棚调查,几乎所有大棚都有发生,且发生程度有逐年加重的趋势,减产20～50％以上。严重影响蔬菜的产量和质量。为此,我们对病害症状和病原线虫种进行了观察研究。一、症状感染线虫的芹菜根、辣椒根都形成明显的大小不等的根结,受害根须很少,地上部表现生长缓慢,植株矮小,叶片小而
With the reform of tillage system and large-scale popularization of greenhouses and vegetables, phytopathogenic nematodes are more and more harmful to vegetables. Because the protected microclimate in the field is suitable for the activity and reproduction of nematodes, and has sufficient host plants, resulting in protection Vegetable nematode serious damage, from 1991 to 1992 in Hong Ning town, Sanyo Township greenhouse investigation, almost all the greenhouses have occurred, and the degree of occurrence has increased year by year, reducing the production of 20 to 50%. Seriously affect the yield and quality of vegetables. To this end, we observed the disease symptoms and pathogenic nematode species. First, the symptoms of infection of nematodes celery root, pepper root are formed of varying sizes of root knot, victimized root little, aboveground growth slow performance, short plants, leaves small