甜菜褐斑病在我省甜菜产区普遍发生而且严重,发病率高达70%左右,尤其在生长季节高温、多雨年份发病严重。褐斑病发生危害,对甜菜产量影响很大,一般可减产20—30%。对质量也有影响,受害重时,可使甜菜块根糖分下降1—2度。甜菜褐斑病病菌以菌丝团在植株残余物、母根根头上和种球上越冬,第二年温度适宜时,菌丝团生成分生孢子,分生孢子借雨水和风传播危害。为控制此病发生危害, Beet leaf brown spot occurs in the beet producing areas in our province and serious, the incidence rate as high as about 70%, especially in the growing season of high temperature, heavy rainy years. Occurrence of brown spot disease, a great impact on the yield of sugar beet, the general reduction of 20-30%. Also have an impact on the quality, victimization, sugar beet root sugar can drop 1-2 degrees. Mycelium brown sugar beet pathogen in the plant residues, roots and bulbs on the mother winter, the second year the temperature is appropriate, mycelium generate conidia, conidia by rain and wind spread hazards. In order to control the occurrence of the disease,