昌平地区小麦白粉病防治适期研究及推广应用

THE STUDY OF SUITABLE STAGE CONTROLLING POWDERY MILDEW OF WHEAT AND ITS EFFECT OF A LARGE SCAIE APPLICATION OF BAYLETON IN THE AREA OF CHANGPING COUNTY

通过多年多点小麦白粉病防治适期的小区试验和大面积推广应用结果分析,小麦白粉病的最佳防治适期为:病害发生一般年份为小麦拔节期,病害流行年份或高感品种种植区为小麦起身期和拔节期.此项技术在1989-1990两年间的应用面积分别为9万余亩和15万余亩,各占当年应防面积的40.9%和81.5%.两年39个点的数据统计表明,适期防治的防病、保产作用大,适期一次防治比常规一次防治平均可增产5.9%,亩增收21.6元.

The suitable stage for Controlling the Powdery mildew was conducted through field trials and a large scale applicalion of Bayleton during last 3 years in many Villages. The results have indicated that the Bayleton spray would be carried out at elongation stage in commonly occurrent year of this diaease, and at both early elongation stage and elongalion stage in epidemic year or applied to sensitive variety for this disease. This conclusion had been used to 6000 hectare in 1989 and 10000 hectare in 1990. The control effect sprayed at above suitable stage was better and the product of wheat was increased 5.9% more than routine control according to data of 39 experiment plots.