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苦瓜炭疽病是苦瓜的重要病害,发生较普遍,为害重。 一、危害症状 幼苗、成株期叶片、茎、瓜条均可发病。幼苗期发病时,子叶边缘出现褐色半圆形或圆形病斑,稍凹陷。成株期发病,叶部病斑近圆形,大小不等,初为水渍状。很快干枯呈红褐色,边缘有黄色晕圈,常常几个小病斑连在一起,呈不规则大病斑。病斑上轮生黑色小点,潮湿时,病斑上生有粉红色黏稠物质,在干燥条件下,病斑常开裂,穿孔。茎上病斑灰白
Bitter melon anthracnose is an important disease of bitter gourd, occurs more common, harmful to weight. First, the symptoms of seedlings, adult leaves, stems, melon can be disease. Seedling incidence, cotyledons appear brown semicircle or circular lesions, slightly depressed. Morphological onset, leaf lesions nearly round, ranging in size, the beginning of water-like. Very quickly dry reddish brown, the edge of the yellow halo, often with a few small lesions together, was irregular large lesions. Spot black spots on the rotation, when wet, there are pink viscous material on the lesion, in dry conditions, the lesion often cracking, perforation. Stalk gray spot on the stem