蚕豆根腐病发病原因较为复杂，药剂拌种是其最有效的防治措施之一，试验筛选出防治蚕豆根腐病适宜拌种药剂，为蚕豆根腐病的防治提供科学依据。选用 5种杀菌剂采用拌种处理的方式，在田间对蚕豆根腐病进行了防治试验。结果表明， 35 g/L咯菌·精甲霜悬浮种衣剂、 440 g/L精甲·百菌清悬浮剂拌种对蚕豆根腐病的防治效果较好，防效分别为 50.00%、45.65%；蚕豆折合产量分别为 2 439.15、2 161.20 kg/hm2，较空白对照分别显著增产 30.96%、16.03%。因此认为，这 2种药剂可用于大田防治蚕豆根腐病，但田间防治拌种处理应与其他防治措施综合应用，才能取得良好的防治效果。

The causes of broad bean root rot are relatively complex, and chemical seed dressing is one of the most effectivecontrol measures. This study screened suitable seed dressing fungicides for the control of broad bean root rot, so as to provide a scien.tific basis for its management. 5 fungicides were selected to control the root rot of broad bean in the field by seed dressing. Resultsshowed that seed dressing with 35 g/L fludioxonil · metalaxyl suspension seed coating agent and 440 g/L metalaxyl · chlorothalonilsuspension agent had better achieved better control effects against broad bean root rot, with control efficacies of 50.00% and 45.65%,respectively. The equivalent yields were 2 439.15 and 2 161.20 kg/ha, respectively, representing significant increases of 30.96% and16.03% compared with the untreated control. Therefore, these two agents can be used to control the root rot of broad beans in the field,but the seed dressing treatment in the field should be combined with other control measures to achieve better control effect.

S436.43