6种杀菌剂对苹果褐斑病的防治效果

Comparison Study on Field Efficiency of Six Fungicides for Controlling Apple Brown Spot

为筛选出防治苹果褐斑病的高效、低毒、安全杀菌剂,通过进行田间药效试验对6种杀菌剂进行药效比较。结果表明,25%丙环唑水乳剂对苹果褐斑病的防效为81.49%,12.5%氟环唑悬浮剂的防效为76.64%,40%肟菌酯悬浮剂的防效为71.51%,50%异菌脲可湿性粉剂的防效为55.68%,80%多菌灵可湿性粉剂的防效为53.71%,80%乙蒜素乳油的防效为49.50%。在试验条件下6种药剂对苹果树均无药害。由试验结果可见,防治苹果褐斑病应优先使用25%丙环唑水乳剂和12.5%氟环唑悬浮剂,为减缓抗药性的产生,应交替使用其他不同作用机制杀菌剂品种。

Abstract In order to screen excellent, low-toxicant and safe fungicides for controlling apple brown spot[Marssonina mall （P. Henn. ）Ito], the control efficiency of six fungicides were compared by field trials. The results showed that the field efficiency of Propiconazole 25% EW was 81.49% ,Epoxicon- azole 12.5% SC was 76.64% ,Trifloxystrobin 40% SC was 71.51% ,Iprodione 50% WP was 55.68%, Carbendazim 80% WP was 53.71% ,Ethylicin 80% was 49.50%. All the six fungicicdes were safe to apple tree. For preventing apple brown spot,Propiconazole 25% EW and Epoxiconazole 12. 5% SC suspension were the priority for alleviating the development of resistance, it was necessary to use dif- ferent types of fungicides with other mechanisms alternatively.