4种杀菌剂对紫皮石斛锈病的田间药效评价

Field efficacy evaluation of four fungicides on dendrobium rust

针对紫皮石斛锈病。试验选用10%苯醚甲环唑WG,250 g/L嘧菌酯SC,29%吡萘·嘧菌酯SC,75%肟菌·戊唑醇WG 4种杀菌剂进行田间药效试验。结果表明:复配剂29%吡萘·嘧菌酯SC 600 mL/hm^2与75%肟菌·戊唑醇WG 300 g/hm^2,防效相当且显著高于其余两个施药处理,在第3次施药后7 d时达最高防效分别为87.70%和88.56%,鲜重折合产量比空白对照分别增产13.48%、13.22%,可在实际生产中交替使用。

Field efficacy trials were conducted to investigate control efficacy of difenoconazole 10%WG,azoxystrobin 250 g/L SC,isopyrazam·azoxystrobin 29%SC and trifloxystrobin·tebuconazole 75%WG against Dendrobium devonianum rust disease.The results showed that control effects of isopyrazam·azoxystrobin 29%SC at 600 mL/hm^2 and trifloxystrobin·tebuconazole 75%WG at 300 g/hm^2 had better are significantly higher than those of the other two fungicides,with the efficacies of 87.70%and 88.56%7 days after treatment,respectively,and fresh weight yield increased by 13.48%and 13.22%than the control,respectively.The results indicated that isopyrazam·azoxystrobin 29%SC and trifloxystrobin·tebuconazole 75%WG can be used alternately in practice.