紫叶黄栌白粉病发生危害及化学防治技术研究

Study on Occurrence and Chemical Control of Cotinus Coggygria Powdery Mildew

白粉病是三门峡紫叶黄栌的主要病害,该病发生危害轻重主要取决于环境的空气湿度,药剂防治表明:15%三唑酮可湿性粉剂1000倍液、40%三唑酮多菌灵可湿性粉剂1500倍液、15%粉锈宁可湿性粉剂1500倍液、12.5%烯唑醇可湿性粉剂2000~2500倍液、25%丙环唑乳油1500倍液、10%多抗霉素可湿性粉剂1000倍液有较好的防治效果。建议做好整枝修剪,优化树体枝条分布,确保林间、树体通风透光,可有效减轻该病的发生。

Powdery mildew is the major disease on Cotinus Coggygria Var.Sanmenxia.The severity of the disease is mainly decided by the air humidity.The results showed that 15%triadimefon wettable powder 1000×,40%triadimefon carbendazim wettable powder 1500×,15%triadimefon wettable powder 1500×,12.5%diniconazole wettable powder 2000~2500×,25%propiconazole emulsion 1500×and 10%doxorubicin wettable powder 1000×had better control effects.It is suggested that pruning,optimal of the distribution of branches,the ventilation and light of forest trees can effectively reduce the occurrence of the disease.