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棉花铃病种类很多,常发生的有炭疽病、红腐病、红粉病、角斑病、黑果病、曲霉病、湿腐病等,个别年份疫病较重,各种铃病的症状分述如下: 炭疽病:铃上生圆形褐色病斑,边缘暗红色,略隆起,中央凹陷,高湿时病斑表面生桔红色粘质物。红腐病:铃上生满一层粉红色霉层,雨后粘集成红色块状物,病铃不能完全开裂。红粉病:铃上生满一层粉红色厚绒状霉层,松散而干燥,不均匀,天气潮湿时呈白色绒毛状,病铃不能正常开裂。黑果病:全铃变黑,僵硬,大多不开裂,也不脱落,缰缩枝上,表面密生许多小黑点,后期铃壳腐朽变烟煤状。
There are many types of cotton boll disease, anthrax, red rot, powdery mildew, angular leaf spot, black fruit disease, aspergillosis, wet rot disease and so on. Common diseases occur frequently in individual years. Symptoms of bell disease As follows: Anthracnose: Bell born round brown lesions, the edge of the dark red, slightly uplift, the central depression, high wet surface spot orange peel raw materials. Red rot: Bell covered with a layer of pink moldy layer, sticky into a red block after rain, sick bell can not be completely cracked. Pink disease: Bell covered with a layer of pink thick layer of moldy, loose and dry, uneven, white fluffy weather humid, sick bell can not be normal cracking. Blackberry disease: full bell black, stiff, most do not crack, nor fall off, the bridle on the stick, the surface of many small black spots, the late bell-shaped rotten decay bituminous coal.