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枯萎病(又称蔓割病)与蔓枯病是为害黄瓜造成减产的主要病害,其症状相似不易区分,因而不能对症施药,延误防治适期,使病害加剧。现将此两种病害的鉴别方法及综合防治介绍于后。 一、枯萎病与蔓枯病的鉴别方法 (一)叶片症状。枯萎病菌不侵染叶片,只是全株坏死后,叶片全部干枯。蔓枯病菌浸染叶片,叶面有圆形或自叶缘向内呈“V”字形病斑,病斑颜色为淡褐色或深褐色,其上密生黑色小点(分生孢子器),轮纹不明显,病斑大小为10—35毫米或更大,后期病斑易穿孔破碎。
Fusarium wilt (also known as vine-cutting) and gummy stem blight are cucumber damage caused by the major diseases, the symptoms are similar and difficult to distinguish, which can not be symptomatic drug application, delay the appropriate period of prevention and control, so that the disease intensified. Now the identification of these two diseases and comprehensive prevention and control introduced in the later. First, the fusarium wilt blight and disease identification methods (a) leaf symptoms. Fusarium does not affect the leaves, but the whole plant necrosis, all the leaves dry. Infected leaves of Bacillus thuringiensis, the leaves are round or inward from the leaf margin was “V” -shaped lesion, lesion color is light brown or dark brown, its dense black dots (conidia), wheel pattern Obviously, the lesion size is 10-35 mm or more, the later lesion easily perforation broken.