黄瓜靶斑病识别与防治

2008年秋季河北省多地露地黄瓜发生一种新病害，其症状与霜霉病和细菌性角斑病极易混淆，生产上误按霜霉病、细菌性角斑病用药，没有防治效果。经鉴定，确定病原茵Corynespora cassiicola（Berk．＆Curt．）wei．瓜棒孢菌，并且试验筛选出了有效的防治药剂。文章详细介绍黄瓜靶斑病的症状特点，其症状与黄瓜细菌性角斑病、黄瓜霜霉病的区别，病原茵的形态特征，病害发生规律以及防治方法。

Identification and Control of Cucumber Target Ieaf Spot

A new disease of cucumber occurred seriously last autumn in Hebei province,because its symptom is easily confused with the symptom of cucumber downy mildew and cucumber angular leaf spot,lt was controlled as cucumber downy mildew and cucumber angular leaf spot,there was no effect.The pathogen was identified as fungi of cucumber target leaf spot Corynespora cassiicola,and effective fungicides were screened out.this article intrudoces the symptom of cucumber target leaf spot,distinction with cucumber downy mildew and cucumber angular leaf spot,its pathogan,regularity of occurrence and control method.