采用美国生产的BG -2、Soilgard两种生物农药和国内生产的生物型种衣剂 (ZSB)对玉米茎腐病和纹枯病苗期和成株期的防治试验表明 :两种生物农药均可在一定程度上防治茎腐病菌在苗期引起的根腐病 ,其中BG -2对镰孢菌的防治效果高达55.14% ;Soilgard对腐霉菌的防治效果达55.57%。BG -2对纹枯病的防治效果比ZSB好。田间试验表明 :ZSB对纹枯病比对茎腐病的防治效果好。1:40的种子包衣量为最佳。粉锈宁与ZSB混用比单独粉锈宁拌种防治茎腐病的效果好 The control experiments on the control effects of BG-2, Soilgard and ZSB produced in the United States on seedling stage and adult-plant stage of corn stalk rot and sheath blight showed that both biopesticides To some extent, root rot caused by stalk rot can be prevented and controlled at the seedling stage. The control effect of BG-2 on Fusarium was 55.14%, and that of Soilgard was 55.57%. BG-2 control of sheath blight better than ZSB. Field experiments showed that ZSB had a better control effect on sheath blight than stalk rot. The best seed coating is 1:40. Triadimefon and ZSB mixed than the single rust Ning Ning seed dressing to control stalk rot effect