几种热雾剂对橡胶树炭疽病的大田防治效果

目的]增加成龄橡胶树炭疽病防治有效剂型—热雾剂的种类。方法]以10%百菌清油烟剂为对照,大田试验了配制的40.44 g/L苯醚甲环唑热雾剂、40.44 g/L丙环唑热雾剂和市售的16%百菌清.咪鲜胺.三唑酮热雾剂的防治效果。结果]施药1次后4种药剂的防治效果依次为40.44 g/L苯醚甲环唑热雾剂>40.44 g/L丙环唑热雾剂>16%百菌清.咪鲜胺.三唑酮热雾剂>10%百菌清油烟剂,40.44 g/L苯醚甲环唑热雾剂药后30、60 d的防效分别为70.80%、76.73%,明显高于其他3种药剂,可在生产上应用。

Field Control efficacy of a Few Kinds of Hot Fogging Concentrate against Colletotrichum Leaf Disease of Rubber Tree

Aims] The aim is to increase alternatives of hot fogging concentrate(hN) which is effective to mature rubber trees against colletotrichum leaf disease.Methods] Using chlorothalonil 10% ol as the control,the efficacy of difenoconazole 40.44 g/l hN(self-made),propiconazole 40.44 g/l hN(self-made) and chlorothalonil.prochloraz.triadimefon 16% hN against colletotrichum leaf disease of rubber tree were tested on mature trees in fields.Results] The results showed that the order of the control effect is difenoconazole 40.44 g/l hN>pr-opiconazole 40.44 g/l hN>chlorothalonil.prochloraz.triadimefon 16% hN>chlorothalonil 10% ol after spraying once.The control effect of difenoconazole 40.44 g/l hN are 70.80 and 76.73% after 30 and 60 d respectively,better than those of the other three fungicides evidently.so difenoconazole 40.44 g/l hN can be used to control colletotrichum leaf disease of rubber tree on mature trees.