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粉锈宁和羟锈宁拌种防治玉米丝黑穗病的田间试验表明,墒情影响药效,墒情好,药效高。正常低土温和正常高墒情相结合,可以达到既压低发病基数,又获得高防效的双重目的。粉锈宁和羟锈宁的防效是近似的。墒情对羟锈宁的影响似更敏感,其防效的稳定性较粉锈宁差,但羟锈宁对幼苗的抑制轻,在逆境下造成的药害小。两种药剂的胶悬剂并不比可湿性粉剂优越。乳剂防效稍高,但药害较重。与促进生长的激素浸种结合应用有降低药效的趋势,不宜采用。室内试验证明,过饱和墒、过低土温和厚复土三者结合是田间按常用量拌种有时造成药害的原因。药害主要发生在干种至种子开始萌动阶段。玉米自交系的抗药性比杂交种差,应用药剂拌种时尤需慎重。
Trials of triadimefon and trihydroxyphenylamin against corn smut showed that soil moisture affected the efficacy, moisture content and efficacy. The combination of normal low soil temperature and normal high soil moisture can achieve the dual purpose of both reducing the incidence of disease and obtaining a high prevention effect. Trimethoprim and trimetropine control effect is similar. Soil moisture is more sensitive to triadimefon, its control effect is poorer than that of triadimefon, but triamcinolone is less inhibitory to young seedlings, causing less phytotoxicity under adverse conditions. The two agents are not superior to wettable powders. Emulsion slightly higher control, but more serious injury. And to promote the growth of hormone soaking combined with the application of the trend of reducing efficacy, should not be used. Laboratory tests show that the combination of super-saturated soil moisture, low soil temperature and thick soil is the reason that phytotoxicity is sometimes caused by seed dressing in the field. Phytotoxicity occurs mainly in dry seeds until seeds begin to germinate. The resistance of maize inbred lines is worse than that of hybrids.