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近几年,在我省部分地区的温室、大棚黄瓜上发生了严重的蔓枯病,产量和品质都大受影响。 1 症状 黄瓜蔓枯病主要危害黄瓜的叶片和蔓,有时叶柄和果实也可受害。叶片上多从叶缘开始向内形成黄褐色“V”字形或半圆形病斑,病斑上略有轮纹,后期病部生小黑点,即为病菌的分生孢子器,发病重时,病斑可扩大至叶面的1/4,后期病斑易破碎。茎蔓上病斑初呈长圆形、油渍状小斑点,后扩大成椭圆形至棱形,灰白色,有时溢出琥珀色的树脂胶状物,严重时病部腐烂、折倒,病部以上茎、叶萎蔫。后期病茎干缩,表皮纵裂呈乱麻状。
In recent years, in some areas in our province, greenhouses and greenhouse cucumbers have experienced serious gyps seed blight, yield and quality are greatly affected. 1 Symptoms Cucumber g..blocked words..s, the main damage cucumber leaves and vine, and sometimes petiole and fruit can also suffer. More leaves from the leaf edge began to form inward yellowish brown “V” -shaped or semi-circular lesions, lesions slightly wheel pattern, the Ministry of disease black spots, the bacteria conidia, the incidence of severe When the lesion can be expanded to the leaf of 1/4, later lesions easily broken. Stem spread on the lesion was initially oblong, small spots of oil-like, enlarged into an oval to prismatic, gray, and sometimes overflowing amber resin jelly, serious disease rot, collapse, the disease above the stem Leaves wilting. Stem shrinkage of the late disease, the epidermis was a hemp-like longitudinal split.