据最近调查,温州、台州等地区严重发生小麦黄化萎缩病,其发生面积大,为害损失严重。温州市各县发病面积达4万多亩。一般受害较重的田块发病率达20％,也有个别麦田几乎颗粒无收。本所农场一块重病田竟发病率达55.9％,一般损失在20～30％左右。有的病株甚至不能拔节抽穗。我们自3月份以来对该病进行系统观察、调查和研究,现将结果归纳如下。 (一)症状:小麦受病菌侵染后,春前病 According to a recent survey, severe wiltrosis of wheat occurs in areas such as Wenzhou and Taizhou, with large area and serious damage. Wenzhou County incidence area of ​​40,000 acres. In general, the incidence of heavy damage to the plots of up to 20%, there are few individual crop fields almost no crop. Our farm a serious disease actually hit a rate of 55.9%, the general loss of about 20 to 30%. Some diseased plants can not even jointed heading. We have systematically observed, investigated and studied the disease since March, and the results are summarized as follows. (A) Symptoms: wheat infected by bacteria, pre-spring disease