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板栗立枯病是苗期主要病害,发生相当普遍。一般幼苗出后尚未木质化,根颈部即出现褐色长形病斑,逐渐向上下蔓延,最后病部凹陷,病皮变黑色。受病害部以下根部组织正常,地上部叶片失水枯萎。防治方法是: 1、选好苗圃。选择地势稍高,地下水位低,排水方便,土质疏松,肥沃而不重茬的沙壤土为苗。 2、整地。结合整地修排水沟,防止雨季积水。可用5%的福美双可湿性粉剂进行土壤灭菌,每亩可用药量0.75公斤。 3、药物拌种。常用10%甲基硫化砷拌种,每百公斤种子用药0.5千克,或
Blight chestnut is the main disease at seedling stage, occurs quite common. General seedlings after the lignification has not yet appeared, the root neck that brown elongated lesions, gradually spread up and down, and finally sick Department of depression, sick skin becomes black. Under the Ministry of the Ministry of disease under the normal root tissue, dry leaves above the ground wilt. Prevention methods are: 1, choose a nursery. Select a slightly higher terrain, low groundwater level, drainage convenience, loose soil, fertile and not stubble of sandy loam soil. 2, site preparation. Combined with site preparation drainage ditches to prevent rainy season water. Available 5% of the bi-wettable powder for soil sterilization, the available dose of 0.75 kg per acre. 3, drug dressing. Commonly used 10% methyl sulfide sulfide seed dressing, 0.5 kg per 100 kg seed medication, or