甘肃省春小麦根病化学防治技术研究

１９９１－１９９５上经室内、田间试验研究，筛选出三唑酮、烯唑醇、丙环唑等三唑类坐菌剂为防治小麦根病的有效药剂，其中以２５％丙环唑乳油拌种病增产效果最好，白穗防效可达９０％以上；不同剂量试验结果，按种重０．０５－０．１％拌种经济有效；通过药剂剂型、施药时期和方法研究表明，改变药剂剂型和施药方法，可延长药效、提高防效；湿抖闷种防病增产效果优于干拌。

Chemical Control of Root Rot of Spring Wheat in Gansu

After laboratory and field experiments,triazole fungicides,such as triadimefon,diniconazole and propiconazole were selected to control the root rot of spring wheat from 1991 to 1995 in Gansu province.The experiments showed that these fungicides were ef fective for the control of root rot of spring wheat,in which seed dressing with propiconazole 250Ec was the most effective with control efficiency was over 90%.Mixing seed with 0.05%~0.10% propiconazole by seed weight was more economical and effective.The endurance and the efficiency were raised by improving the way of applications and the formulations.Field application showed that effects of closed seed mixing for 24 hours were better than seed dressing.