番茄为害症状 :病害主要为害叶片 ,严重时也为害茎、花、果实等。叶片染病 ,叶面出现椭圆形或不规则形淡黄色病斑 ,叶背面病斑上长出灰紫色至黑褐色的绒状霉层 ,是病菌的分生孢子梗和分生孢子。条件适宜时 ,病叶正面也长出霉层。病害严重时可引起全叶卷曲 ,植株呈现黄褐色干枯 Tomato damage symptoms: the main damage to the leaves of the disease, but also in severe cases stems, flowers, fruits and so on. Leaf blade disease, oval or irregular yellowish leaf lesions appear on the back of the leaf lesions on the gray-purple to dark brown hairy mold layer is the pathogen conidia and conidia. When conditions are right, sickle leaves also grow moldy positive. Severe disease can cause full-leaf curly, yellow brown plants appear dry