【摘要】 研究分析了陕西设施蔬菜根结线虫病的分布、危害及影响其发生的主要因素。结果表明,蔬菜根结线虫病分布于陕西关中、陕北、陕南不同生态区,发生第3年的棚室有部分出现绝收,以黄瓜、厚皮甜瓜受害最重。辣椒有一定的耐病性;韭菜、葱、大蒜具有较强的抗病性。3月中旬至5月下旬为侵染及危害的高峰期。以卵或2龄幼虫随病残体在土壤中度过寄主中断期。病土、病苗、灌溉水及病残体是近距离传播主要途径,远距离传播主要是借助流水、风、病土搬迁、农机具、带病的种子和有机肥等。设施蔬菜种植面积的迅速扩大是引起陕西蔬菜根结线虫病大面积发生的主要原因,且随着棚室连作种植年限的延长其发生危害程度加重。合理轮作、高温消毒、栽植无病种苗及1.8%阿维菌素2000~3000倍液灌根可有效控制根结线虫病的危害。切断传播途径是预防蔬菜根结线虫病发生面积进一步扩大的关键技术措施。更多还原

【Abstract】 The survied result showed that the third year vegetative shed harvest hopeless partly,heavy losses in cucumber and tomato,fixed resistance in pepper fairly resistance in chives,scallion and garlic Infective and damageable peak happened from mid march to late may.Oval and second in star larva with diseased survival through host discontinuities peril.Diseased soil,disease seedling,irrigative water and diseased survival are the main disseminated channel soil dissemination,farm tools adhere both with diseased survival and soil.stain with diseased seed and other nutritive and activities by people those all for far distance dissemination rational rotation,high temperature disinfection non-diseased seedling culture and 1.8% abamection 1 500～2 000 times liquid root irrigation to cut off disseminated channel are the technical measure for rooted vegetative nemas control.更多还原