论文部分内容阅读
为筛选出高效安全的烟田茎叶除草剂,该文采用喷雾法研究了8种除草剂对烟田杂草的防除效果及烟草的安全性和增效剂“倍创”对砜嘧磺隆的减量增效作用.结果表明15%精吡氟禾草灵EC 750mL/hm2、10.8%高效氟吡甲禾灵EC 1 200mL/hm2、5%精喹禾灵EC 750mL/hm2和12%烯草酮EC 600mL/hm2对单子叶杂草具有良好的除草效果,药后30d的株防效均达80%以上,鲜质量防效均达75%以上;25%氟磺胺草醚AS 1 500mL/hm2、24.1%三氟羧草醚AS 1 125mL/hm2和75%三氟啶磺隆钠盐WP 225g/hm2对阔叶杂草具有良好的除草效果,药后30d的株防效均达80%左右;25%砜嘧磺隆WG 75g/hm2总体防效最高,药后30d的总体株防效和鲜质量防效均达70%左右.对烟草最为安全的除草剂是25%砜嘧磺隆WG,其处理后对烟草生长各项指标的影响由药后15d虽低于对照但差异不显著,到药后30d与对照差异不显著且高于对照;10.8%高效氟吡甲禾灵EC、15%精吡氟禾草灵EC和12%烯草酮EC对烟草也较为安全;5%精喹禾灵EC、25%氟磺胺草醚AS、24.1%三氟羧草醚AS和75%三氟啶磺隆钠盐WP对烟草不安全.倍创是砜嘧磺隆较为适合的增效剂,0.02%(W/W)的倍创同减少砜嘧磺隆常规用药量的20%混配处理的防效与砜嘧磺隆常规用药量处理不存在极显著性差异,此配方可推荐为砜嘧磺隆田间使用的减量增效配方.
In order to screen efficient and safe tobacco stem and leaf herbicide, we studied the control effect of 8 herbicides on tobacco weeds and the safety of tobacco by spraying method. The results showed that 15% fluazifop-p-ethyl EC 750 mL / hm2, 10.8% ciprofloxacin EC 1 200 mL / hm2, and 5% quizalofop-p-ethyl EC 750 mL / hm2 and 12 % Cleopatra EC 600mL / hm2 has a good weeding effect on monocotyledonous weeds, and the control effect of the plants reached more than 80% after 30 days and the fresh-quality control effect reached more than 75%. The 25% fomesafen AS 1 500mL / hm2, 24.1% acifluorfen AS 1 125mL / hm2 and 75% trifloxysulfuron sodium WP 225g / hm2 on broadleaf weeds has a good herbicidal effect, the control effect of 30d after the drug up to 80%, while the control efficacy of 25% rimsulfuron WG 75g / hm2 was the highest, and the control efficacy and the fresh mass control efficiency reached about 70% after 30d.The herbicide most safe for tobacco was 25% The results showed that there was no significant difference between the control group and the control group on the 15th day after the treatment, but no significant difference was found between the control group and the control group after 30 days of treatment. The 10.8% EC, 15% of fine fluorine fluorine Wo Ling EC and 12% clethrene EC are also safer against tobacco; 5% quizalofop-p-ethyl EC, 25% fomesafen AS, 24.1% acifluorfen and 75% trifloxysulfuron sodium WP Tobacco is unsafe. Bei Chong is a more suitable synergist of rimsulfuron, 0.02% (W / W) times the fold with the reduction of the conventional dose of 50% There is no significant difference in the conventional dosage of sulfonamide. This formula can be recommended as a reducing synergistic formula for the use of sulfasulfuron in the field.