5种杀菌剂对马铃薯黑痣病的田间防效试验

Control Efficacy of Five Fungicides on Potato Black Scurf

近年来,马铃薯黑痣病在定西地区发生危害逐年加重,由次要病害已上升为主要病害,严重影响着马铃薯的产量和品质。在田间进行了5种杀菌剂拌种处理对马铃薯黑痣病的防效试验。结果表明,250g/L嘧菌酯悬浮剂、240g/L噻呋酰胺悬浮剂和42.4%唑醚·氟酰胺悬浮剂对马铃薯黑痣病防治效果较好,增产明显。3种药剂防效分别为81.98%、80.83%和71.60%,与空白对照相比增产率分别为44.42%、34.26%和33.54%。因此认为这3种药剂可以应用大田防治马铃薯黑痣病。

In recent years, the damage of potato black scurf in Dingxi has been increasing year by year, and the disease as a secondary disease has risen to the main disease, which seriously affects the potato yield and quality in potato. Under field conditions, five fungicides seed dressing were tested in field for control of potato black scurf. When compared with the control, 250 g/L Azoxystrobin SP, 240 g/L Thifluzamide SP and 42.4% Fluxapyroxad·pyraclostrobin SP had better control effects on potato black scurf and yield were increased. The control efficacy of these three fungicides was 81.98%, 80.83% and 71.60%, and the rate of yield increase was 44.42%, 34.26% and 33.54%, respectively. Therefore, these three fungicides could be used for prevention and control of potato black scurf in field.