Abstract:

"One spray and three preventions" at the wheat panicle stage is the key technology to achieve wheat disease prevention，insect prevention and premature aging. In order to clarify the implementation effect of this technology in the mountainous and hilly wheat area of southeast Zhejiang，Xianju Agricultural Technology Extension Center & Xianju Plant Protection and Quarantine Station carried out experimental demonstrations in Lizhai Village，Tianshi Town，Xianju County in 2023-2024. The results showed that in 2023 and 2024，the control effect of "one spray and three prevention" on wheat scab reached 97.20% and 86.18%，and the yield reached 6 005 and 4 952 kg·hm^-2，which was significantly （p<0.05）better than farmers' self-control treatment and CK. In 2024，the quality of wheat treated with "one spray and three prevention" technology reached the first-class standard，which increased by 2 629.48 yuan·hm^-2 compared with the comprehensive income of farmers' self-control treatment，exhibiting a significant effect on disease prevention and yield increase，which has good promotion value.

Key words: one spray and three prevention, pydiflumetofen, wheat scab, prevention and control effect, yield improvement