红壤旱地黑芝麻茎点枯病药剂防效研究

Study on Control Effect of Fungicides Against Stem Blight in Black Sesame with Ren Soil Upland

[目的]探讨药剂处理对黑芝麻茎点枯病的防控效果。[方法]在芝麻始花期后,连续2次喷施以72%农用链霉素SP+70%甲基托布津WP不同比列不同用量复配混用的药剂防治黑芝麻茎点枯病,以72%农用链霉素SP、70%甲基托布津WP为对照药剂,以清水为空白对照。[结果]喷施300 g/hm2+450 g/hm2(农用链霉素+甲基托布津)、300 g/hm2+300 g/hm2(农用链霉素+甲基托布津)2个处理区的防治效果最好,均达70%以上,增产效果显著高于其他处理区,增产20%以上。[结论]在芝麻始花期喷施甲基托布津和农用链霉素单剂及其复配混用的药剂对芝麻茎点枯病的发生有一定的防控效果。

[ Objective] The aim was to study on control effect of fungicides against stem blight in black sesame with ren soil upland. [ MethodJ In sesame flowering, different proportion and dosage of compound mixing 72% streptomycin SP ＋ 70% thiophanate-methyl WP were continuously sprayed two times to control black sesame stern blight, with 72% streptomycin SP and 70% thiophanate-methyl WP as control agents, with water as the blank control. [ Result] The results showed that spraying 300 g/hm2 ＋450 g/hm2（ streptomycin ＋ thiophanate-methyl）,300 g/hm2 ＋ 300 g/hm2（ streptomycin ＋ thiophanate-methyl） were the best control effect of two processing area, all above 70%, and the yield-increasing effect significantly was higher than other processing areas, increasing more than 20%. [ Conclusion] In sesame flowering, different proportion and dos- age of compound mixing 72% streptomycin SP ＋ 70% thiophanate-methyl WP was have certain effect.