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进行了防治小麦纹枯病单剂和混剂农药的筛选及其应用技术的研究。结果表明,供试药剂对小麦纹枯病菌都具有抑制作用,但其有效浓度有所不同。福美双、多菌灵、三唑酮、担菌灵和井冈霉素的EC_(50)分别为12.2857、4.0346、1.7824、4.0346和16.9200μg/ml;混剂福美双十三唑酮的EC_(50)为0.2805μg/ml,共毒系数为1109.857,具有明显增效作用。在此基础上,田间比较了上述药剂三种施用方法的防治效果。结果表明,拌种药效明显优于同种药剂喷雾,单剂拌种以三唑酮防效较好,其防效为75.80％,且持效期最长;混剂以福美双+三唑酮拌种防效最好,防效为95.09％;喷雾以三唑酮和井冈霉素防效较好;药剂拌种+春季喷雾1次能有效控制小麦纹枯病的发展。
The control of wheat sheath blight single and mixed pesticides screening and application of technology research. The results showed that the tested agents had inhibitory effects on R. solani, but their effective concentrations were different. EC 50 of thiomersal, carbendazim, triadimefon, benzimid and validamycin were 12.2857, 4.0346, 1.7824, 4.0346 and 16.9200 μg / ml, respectively. ) Was 0.2805μg / ml, the co-toxicity coefficient was 1109.857, with a significant synergistic effect. On this basis, field comparison of the above three methods of application of pesticides control effect. The results showed that the effect of seed dressing was better than that of the same kind of agent. The effect of triadimefon was better with single herbicide and the control effect was 75.80% Ketone seed dressing was the best, the control efficiency was 95.09%. The spray control with triadimefon and validamycin was better. Spraying agent + spring spray once could effectively control the development of wheat sheath blight.