随塑料薄膜覆盖黄瓜的栽种面积不断扩大,从外省引进黄瓜品种也越多,难免一些病害随种子传入我省,造成黄瓜病害种类增多而影响产量。目前生产上突出的新病害—黄瓜黑星病。黄瓜黑星病在欧洲北部、美国、日本发生甚重。1982年辽宁省丹东市覆盖栽培黄瓜上发生较重,相继在大连、沈阳、长春等地也有所发生。为害部位主要在嫩叶、幼嫩茎、卷须和幼果。幼苗子叶受害产生黄白色圆形斑点,随子叶腐烂至使幼苗死秧;幼果发病初为暗绿色凹陷斑,进而病斑龟裂呈疮痂 Cucumber covered with plastic film planting area continues to expand, the introduction of cucumber varieties from other provinces are more, it is inevitable that some diseases with the seeds introduced to our province, resulting in an increase of cucumber diseases and affect the yield. The current highlight of the new production of disease - cucumber scab. Cucumber scab in northern Europe, the United States, Japan, very serious. In 1982, Dailong City, Liaoning Province, covering cucumbers heavier, one after another in Dalian, Shenyang, Changchun and other places have also occurred. Damaged parts mainly in young leaves, young stems, tendrils and young fruit. Seedling cotyledons produce yellow-white circular spots, decayed with the cotyledons to seedling dead seedlings; young fruit early onset of dark green depression spot, and then spotted lesions were scab