Triazole fungicides are a class of long-acting, high-efficiency, low-toxic and safe systemic fungicides with strong internal absorption properties. After seed dressing, the chemicals can be absorbed by the roots of the crops and transmitted to various parts of the plant. The drug effect can not only inhibit the infection and reproduction of the pathogen, but also improve the disease resistance of the host plant and the yield of the wheat. For example, when wheat is planted, the triazolone wettable powder can be used for seed dressing at a ratio of 0.03% (active ingredient) of dry seed weight, and the control effect on stripe rust can reach 99.5%, and the control effect in adult stage is also 70%. Above, the effective concentration of the agent in the wheat plant can be maintained for 95 days, and has a stimulating effect on the growth of the wheat, and can increase the yield by 2 to 3% even in the case where the disease does not occur, and the economic benefit is 1:10 or more. More importantly, the seed dressing at the source of the disease base can prevent the spread and spread of the summer and wintering bacteria sources, and achieve the purpose of “pre-pressure control, control point maintenanceâ€.
In the Tianshui, Weinan, Longdong, Northwest Sichuan, Ningnan and other wheat stripe rust, the summer variability zone (autumn bacterial source base), and the Sichuan Basin, Northwest Hubei, Southern Shaanxi, South Henan, Chongqing, Daixi, Weinan Strongly promoting pesticide seed dressing in key wintering areas such as Yunnan mountain dams or plains (spring bacterial source base) can not only effectively control the epidemic hazards of local wheat stripe rust, but also protect the majority of wheat areas from the epidemic of stripe rust. It is vital. Tests have shown that the larger the treatment area, the more thorough the seed dressing and the better the effect.
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