论文部分内容阅读
调查了武汉、沙市、宜昌、恩施、孝感、黄岗、襄樊、荆门、十堰９地市郊的３４种蔬菜根结线虫病发生特点。结果表明，葫芦科、豆科和茄科蔬菜受害最重，发病级别达３～４级；红萝卜等１１种蔬菜受害较轻，病株率为２０％～５０％，病级１～２级；大蒜等１０种蔬菜未见发病。南方根结线虫（Ｍｅｌｏｉｄｏｇｙｎｅｉｎｃｏｇ－ｎｉｔａ）是引起我省蔬菜发病的优势虫种。５～３０ｃｍ的耕作层土壤中根结线虫群体数量较大，受害根常形成须根团，在５ｃｍ深度的土层中延伸达５０ｃｍ。
Investigations were made on the occurrence characteristics of 34 root-knot nematodes diseases in the suburbs of Wuhan, Shashi, Yichang, Enshi, Xiaogan, Huanggang, Xiangfan, Jingmen and Shiyan. The results showed that Cucurbitaceae, Leguminosae and Solanaceae vegetables suffered the most serious diseases, with the grade of 3 ~ 4. The 11 kinds of vegetables such as carrot were harmed less, the diseased plants were 20% ~ 50% and the grades 1 ~ 2 No incidence of 10 kinds of vegetables such as garlic. Southern root-knot nematode (Meloidogyneincog-nita) is the dominant species of vegetables in our province. The number of root-knot nematode populations in the topsoil with the depth of 5cm to 30cm was large, and the root of the root often formed fibrous roots, extending up to 50cm in the depth of 5cm.