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在田间小区试验条件下,研究了戊唑醇拌种(有效成分1g/kg种子)和5～9叶期喷雾(193.5ga.i./hm2)等不同处理方式对玉米褐斑病发生的空间分布影响、防效和增产作用。结果表明:戊唑醇在玉米5～9叶期喷雾处理能有效抑制玉米褐斑病的发生,发病叶片均控制在第5展开叶内,控制效果显著好于拌种处理,尤其是8叶期喷雾处理防效达94.2%,处理小区玉米增产效果明显,增产率达33.2%,可见8叶期为防治玉米褐斑病的最佳用药时期。
In field plot experiment, the effects of tebuconazole seed dressing (active ingredient 1g / kg seed) and 5 ~ 9 leaf stage spray (193.5ga.i./hm2) on the occurrence of corn leaf spot Distribution impact, control effect and stimulation effect. The results showed that tebuconazole sprayed at 5-9 leaf stage of corn could effectively inhibit the occurrence of corn leaf spot. The control leaf blade was controlled in the fifth leaf, the control effect was significantly better than that of the seed dressing, especially in the 8-leaf stage The effect of spray treatment was up to 94.2%, and the yield increase effect of corn in plot plot was obvious, yield increase rate was 33.2%. The 8-leaf stage was the best time to control corn leaf spot.