为筛选可兼防辣椒疫病、根腐病及枯萎病的高效生物杀菌剂，采用室内抑菌试验，测定哈茨木霉、枯草芽孢杆菌、荧光假单胞杆菌及医植酵素等4种生物杀菌剂和化学药剂多菌灵分别在高、中、低3种浓度下对辣椒疫病、根腐病与枯萎病病原菌的抑制效果。结果表明，荧光假单胞杆菌与哈茨木霉可兼防辣椒疫病、根腐病及枯萎病；在药剂推荐浓度下，荧光假单胞杆菌对辣椒疫病、根腐病、枯萎病抑菌率分别为83.11%、89.81%、78.80%，哈茨木霉分别为88.39%、74.63%、89.68%，这两种药剂可作为推荐用药。

In order to screen effective biocides that can also prevent phytophthora blight, root rot and fusarium wilt in capsicum, the inhibitory effects of Trichoderma harzianum, Bacillus subtilis, Pseudomonas fluorescens, Phytophthora enzymes and the chemical agent Carbendazim on phytophthora blight, root rot and fusarium wilt of capsicum were measured at high, medium and low concentrations in laboratory. The results showed that Pseudomonas fluorescens and Trichoderma harzianum could simultaneously prevent phytophthora blight, root rot and fusarium wilt of capsicum. With the decrease of concentration, the bacteriostatic effect of 5 tested agents showed a decreasing trend. At the recommended concentrations, the inhibitory rates of Pseudomonas fluorescens against phytophthora blight, root rot disease and fusarium wilt were 83.11%, 89.81% and 78.80%, respectively whereas those in Trichoderma harziana were 88.39%, 74.63% and 89.68%, respectively. These two agents can be used as recommended drugs.

S641.3

甘肃省青年科技基金(23JRRF0003)；陇原青年创新创业人才项目(2021LQGR70)。