用5种生物药剂和1种化学药剂对马铃薯疮痂病及粉痂病的防效进行比较试验。结果表明，50%多菌灵可湿性粉剂、5亿孢子/g多粘芽孢杆菌可湿性粉剂、3亿CFU/g哈茨木霉菌可湿性粉剂、100亿孢子/g枯草芽孢杆菌可湿性粉剂、100万孢子/g寡雄腐霉可湿性粉剂对马铃薯疮痂病的防效较低，不建议使用；72%农用(硫酸)链霉素可湿性粉剂可用于防治马铃薯疮痂病。100亿孢子/g枯草芽孢杆菌可湿性粉剂、100万孢子/g寡雄腐霉可湿性粉剂对马铃薯疮痂病的防效显著，这2种药剂均可用来防治马铃薯粉痂病。生物制剂对马铃薯疮痂病及粉痂病的防效优于传统化学药剂多菌灵，而同种药剂对马铃薯粉痂病的防效优于对马铃薯疮痂病的防效。

The effects of five bio-agents and one chemical agent against potato scab and powdery scab were compared. The results showed that 50% carbendazim， 500 million spores/gram of Bacillus polymyxa， 300 million CFU/gram of Trichoderma， 10 billion spores/gram of Bacillus subtilis and 1 million spores/gram of Pythium oligosaccharides were less effective in controlling potato scab， and these five fungicides were not recommended. 72% streptomycin sulfate can be used to control potato scab. Bacillus subtilis 10 billion spores per gram and Pythium oligospermum 1 million spores per gram had significant control effect on potato scab disease， and both of them could be used to control potato scab disease. The biological agents had better control effect on potato scab and powdery scab than traditional chemical carbendazim， while the same agent had better control effect on potato scab than on potato scab.

S532；S482.2

国家重点研发计划项目(2017YFD0201602-4)；甘肃省农业科技创新项目(GNCX-2016-7)。