几种新型杀菌剂对菜豆炭疽病菌的室内毒力测定

采用生长速率法,测定了咪鲜胺锰盐、福·福锌、苯醚·溴菌腈、二氢蒽醌、苯醚甲环唑和多福·溴菌腈等6种新型化学药剂对菜豆炭疽病菌的生长抑制作用。结果表明,6种化学药剂对菜豆炭疽病菌均具有抑制作用,其中80%福·福锌可湿性粉剂和10%苯醚甲环唑水分散粒剂的抑菌效果最好,浓度为1 000 mg·L~(-1)时的抑菌率分别达到了77.68%和72.96%,EC_(50)分别为212.41 mg·L~(-1)和296.83 mg·L~(-1)。因此,80%福·福锌可湿性粉剂和10%苯醚甲环唑水分散粒剂可作为田间防治菜豆炭疽病的候选药剂。

Indoor Toxicity Measurement of Several Fungicides Against Colletotrichum lindemuthianum in vitro

The inhibitory effects of 6 fungicides（prochloraz manganese salt，Fu zinc，phenyletherbromothalonil， dihydroanthraquinone，difenoconazole，carbendazim-thiram-bromothalonil）on the growth of Colletotrichum lindemuthianum were determined by growth rate method. The results showed that all of these 6 fungicides had inhibitory effect on the pathogen of Colletotrichum lindemuthianum. Among them，80% Fu zinc WP and 10% difenoconazole WG presented the best inhibitory effects. At the concentration of 1 000 mg·L^-1，their inhibitory rates were 77.68% and 72.96%，respectively，and the EC₅₀ values were 212.41 mg·L^-1 and 296.83 mg·L^-1，respectively. Thus，80% Fu zinc WP and 10% difenoconazole WG can be used as candidate fungicides in managing bean anthracnose in the fields.