番薯蔓割病是由真菌所引起的。也是目前番薯的主要病害。对番薯产量影响极大,一般能导致番薯减产百分之十到十五,严重的减产百分之二十。为了控制番薯蔓割病的发生,我们在舟山地区农林局的指导下,选用了内吸性较好的杀菌剂——甲基托布津,配制成不同浓度的稀释液,进行浸苗处理,效果显著。一般能够减轻病害株百分之十八左右,增加鲜番薯百分之十三,每亩增产番 Sweet potato sprouts are caused by fungi. It is also the main disease of sweet potato. Very significant impact on the production of sweet potatoes, can generally lead to 10-15 percent reduction in sweet potato production, a serious reduction of 20 percent. In order to control the occurrence of potato tuberose cutting, under the guidance of the Bureau of Agriculture and Forestry in Zhoushan, we selected thiophanate-methyl, which is a better bactericide, in different concentrations to prepare the seedlings. Significant. Generally can reduce the diseased plants about 18 percent, increase fresh sweet potato by 13 percent, increase production per mu