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近年来,白三叶草坪在河南许多地区大量种植,美化了环境。但草坪白绢病发病严重,且来势凶猛,7-15天内就可造成草坪大面积枯黄、死亡。现将白绢病的防治方法介绍如下:一、症状白三叶草发病初期,茎叶瘦弱,叶色发黄。拨开茎叶会看到植株基部和地上有少数白色棉絮状菌丝体。中期叶色枯黄,茎部失水萎蔫,茎基部和地上有大量白色棉絮状菌丝体。后期茎叶变褐、枯死,地上产生白色至褐色菌核。发病草坪开始出现圆形、环形的黄色枯草斑,直径一般为0.2m,有时可达1m,以后枯草斑边缘病株表现为红褐色
In recent years, white clover lawn in many parts of Henan planted a large number of landscaping. However, serious incidence of turf sclerotium, and ferocious, 7-15 days can cause a large area of lawn yellow, death. Now Sclerotium disease prevention methods are described below: First, the symptoms of white clover early onset, thin stems and leaves, leaf color yellow. Poking open the stems and leaves will see the plant base and a few white cotton-like mycelium. Mid-term leaf color yellow, stem wilted water loss, stem base and the ground a large number of white cotton-like mycelium. Late leaves brown, dead, the ground produces white to brown sclerotia. The lawn began to appear round, annular yellow hay fever spots, the diameter is generally 0.2m, sometimes up to 1m, after the hay edge diseased plants showed reddish brown