70％氟唑磺隆WDG防除春小麦田杂草效果及应用技术研究

摘要

[Objective]This project aims to make it clear that using 70％ flucarbazone WDG in spring wheat fields has control effect on different kinds of weeds and the best methods for that purpose in order to provide guidance for scientific,safe and efficient use of the herbicide.[Method] The control effects on weeds by spraying the different doses of this herbicide mixed with security agent or broadleaf herbicide were evaluated by using randomized block method and fixed-point sampling.And whatˊs more,the security to wheat growth during different growth period of using different techniques was investigated and evaluated and finally,the wheat yield was measured as well.[Result] The control effects on wild oat was 92.6％ after 30 days by spraying 31.5 g a.i./hm2 of 70％ flucarbazone WDG.The fresh weight control effect was 95.4％ after 45days.The control effect on broadleaves weeds was 57.5％-65.4％ after 30 days,and the humid weight control effect was 63.6％-74.1％ after 45 days.The herbicide combined with cloquintocet or mefenphyr did not reduce the numbers of wild oat,wild rape and secondary rape.When it was combined with 2,4-D butylate or Tribenuron-methyl,the control effect on broadleaves weed was raised evidently and meanwhile the effect on wild oat was kept.The control effects on weeds (general plant) were over 90.4％ 30 days later after spraying flucarbazone and fresh weight control effect 94.4％ after 45 days.The different treatments of flucarbazone would increase the wheat yield by about 3.4％-18.8％.[Conclusion]31.5 g a.i./hm2 70％flucarbazone WDG mixed with 2,4-D butylate or tribenuron-methyl had high control effect on weeds in the field and was safe for wheat when it was sprayed during the period of 5 leaves (major weed period of 3-5leaves).%[目的]明确70％氟唑磺隆WDG对春小麦田不同杂草的防除效果及相应的最佳使用方法,为科学、安全、高效应用该除草剂提供依据.[方法]采用随机区组、定点取样法调查70％氟唑磺隆WDG不同剂量单用及加入安全剂、与阔叶除草剂混用对春小麦田杂草的控制效果.通过药后田间观察及测产,评价不同处理对小麦生长的安全性.[结果]药后30 d,70％氟唑磺隆WDG 31.5 g a.i./hm2对野燕麦株防效达92.6％,药后45 d鲜重防效在95.4％.对阔叶杂草野油菜、次生油菜也有一定的兼治作用,药后30 d株防效在57.5％～65.4％,药后45 d鲜重防效在63.6％～74.1％.该除草剂与安全剂Cloquintocet、Mefenphyr混用,不降低其对野燕麦、野油菜、次生油菜的防除效果,而与2,4-D丁酯、苯磺隆混用,在保持对野燕麦高防效的同时,可极显著地提高对阔叶杂草的控制效果,药后30 d,对杂草总株防效达90.4％以上,45 d总鲜重防效在94.4％以上.70％氟唑磺隆WDG各使用处理的小麦产量均有增加,增产幅度在3.4％～18.8％.[结论]在春小麦5叶期(田间主要杂草3～5叶期),70％氟唑磺隆WDG 31.5 g a.i./hm2与苯磺隆或2,4-D丁酯混用,能够高效防除杂草,且对小麦安全.