小麦条锈病防治指标的研究

On Research of Preventive Target of Wheat Yellow Stripe Rust Disease

本项研究表明:冬小麦感条锈病的品种,顶3叶的病情指数(x)与小麦产量的损失率(y)的关系式为y=0.3646x;药剂防治条锈病的适期在旗叶始出至抽穗初期,在此期间小麦顶3叶的病情指数达3%时,即为防治指标;此时施药,仅施一次就能达到极显著的防效。

This research shons： Varieties of winter wheat are infected by wheat yellow stripe rust, the equation is y= 0.3646x about disease index of 3 leaves on the top（x） and losing rate（y） of wheat yield; the fit period for preventing yellow stripe rust by using medicaments is＇from the beginning of leaves to the beginning of heading. During this period, when disease index of top 3 leaves is up to 3%, it is called preventive target. At this time, applying drugs for only one time can get significant preventive effect.