为明确小麦不同生长期喷施430 g/L戊唑醇悬浮剂对小麦赤霉病防治效果的影响，于2021年在甘肃省陇南市徽县栗川镇范寺村进行了田间试验。结果表明，在小麦抽穗期、扬花期、灌浆期喷雾，田间防效分别为93.23%、84.39%、36.51%，折合产量分别为9 168.0、8 949.0、8 376.0 kg/hm2，较喷清水分别增产10.76%、8.12%、1.19%。说明小麦抽穗期到扬花期是甘肃陇南防治小麦赤霉病的关键时期，在该阶段进行杀菌剂喷雾防治，可有效控制小麦赤霉病的发生流行。

To evaluate the control effects of fungicide tebuconazole suspension concentrate 430 g/L against Fusarium head blight(FHB, caused by Fusarium graminearum) at different growth stage of wheat, field experiment was carried out at Fansi Village, Lichuan Township, Hui County, Longnan, Gansu Province in 2021. Results showed that the field efficiencies of spraying at heading stage, flowering stage and filling stage were 93.23%, 84.39%and 36.51%, respectively, average yields were 9 168.0 kg/ha, 8 949.0 kg/ha and 8 376.0 kg/ha, respectively, and the increased ratios in yield were 10.76%, 8.12% and 1.19%, respectively. This illustrated that the key control stage for FHB were heading to flowering stage in southern Gansu and sprayed with fungicides at this stage would be beneficial to the effective control of the occurrence and spread of FHB.

S435.121

甘肃省科技厅重点研发项目“陇南徽成盆地小麦赤霉病监测与防控”(20YF3NA023)；金城科普专家曹世勤研究员工作室。