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1990～1992年,在郑州市郊的须水乡观察到小麦苗成片变黄,拔出后根系簇根丛生,重病田病株率达100%,减产40%以上,发病面积达数百亩。经鉴定该病是由禾谷孢囊线虫 Heterodera avenae Wollenweber 引起的小麦孢囊线虫病。此病发生于世界30多个国家,1991年陈品三等首次报道在我国发现该病。经观察,小麦出苗后1个月左右地上部即可表现症状,最初下部叶片叶尖先变黄,随
From 1990 to 1992, wheat seedlings were yellowed after being planted in Xu River in the outskirts of Zhengzhou. After rooting, the root cucumber cluster was overgrown. The rate of diseased plants in severe disease reached 100% and the yield was reduced by 40% or more. The disease area reached several hundred mu. The disease was identified as wheat cyst nematode caused by Heterodera avenae Wollenweber. The disease occurred in more than 30 countries in the world. In 1991, Chen et al. First reported the disease in China. After the observation, about 1 month after emergence of wheat to the upper part of the symptoms can be manifested, the first leaf blade tip of the lower part of the first yellow, with