不同浓度戊唑醇包衣处理对玉米丝黑穗病防治效果分析

以高感玉米丝黑穗病品种为试验材料，人工接种丝孢堆黑粉菌，验证在设定药种质量比包衣下，采用0.1%～1.1%不同浓度梯度戊唑醇种衣剂进行不同播期处理，对玉米丝黑穗病的防治效果，分析玉米播种至8叶期的土壤温湿度对玉米丝黑穗病发生的影响。结果表明，土壤温度是丝黑穗病菌侵染的关键因子。不同播期处理，玉米丝黑穗病发生率差异较大，播期早，出齐苗时间长，玉米丝黑穗发病重；播期晚，出齐苗时间短，丝黑穗病发生相对轻。0.1%～1.1%浓度戊唑醇种衣剂防治玉米丝黑穗病效果为53.07%～90.87%，0.9%戊唑醇包衣处理对玉米丝黑穗病的防治效果最好。

Analysis on the Control Effect of Different Concentrations of Tebuconazole Coating on Maize Head Smut

Using high-sensitivity maize head smut varieties as test materials, artificial inoculation of Sporisorium reilianum, and verifying that under the setting of the drug mass ratio coating, 0.1% to 1.1% different concentration gradient tebuconazole seed coating agent, different sowing date treatment, the effect of preventing and controlling the head smut, and the influence of soil temperature and humidity on the occurrence of head smut from the sowing stage of maize to the 8-leaf stage was analyzed. The results showed that soil temperature is a key factor in the infection of smut. The treatment rate of head smut is different in different sowing dates. The early sown date, the incidence of head smut is serious, otherwise it is light; the effect of 0.1% to 1.1% concentration of tebuconazole seed coating agent to control head smut is 53.07%-90.87%. Among them, 0.9% tebuconazole coating treatment had the best effect on the prevention of head smut.