3种除草剂不同配比对泽漆的防除效果

【目的】研究3种除草剂不同配比防除狗牙根草坪内泽漆的效果，筛选出最优防除方案，为有效防除泽漆提供科学依据。【方法】用77.7%草甘膦铵盐可溶粒剂、56% 2甲4氯钠可溶性粉剂、40%苄·二氯（苄嘧磺隆+二氯喹啉酸）可溶性粉剂正交组合的16种不同配比对泽漆进行防除，在施药后3，6，12，20，30 d分别观察记载泽漆外观状态，统计死亡植株数，计算药效指数、株防效，并在施药后3，6，12，20，30，45 d观测记载狗牙根生长情况。【结果】3种除草剂不同配比对泽漆的防效差异显著（P＜0.05），3种除草剂混用对泽漆的防除效果比2种混用效果好，2种混用的效果比单一好。当3种除草剂混用时，以40%苄·二氯可溶性粉剂85 mg/m²＋56% 2甲4氯钠可溶性粉剂300 mg/m²＋77.7%草甘膦铵盐可溶粒剂420 mg/m²组合防效最好，药后3～6 d，药效指数达到96.0%～97.6%，株防效可达到88.9%，药后20 d药效指数和株防效均达到100%，且在30 d内没有再生能力。单一除草剂的使用对狗牙根生长无影响或影响甚微，2种及3种除草剂混用在药后3～20 d对狗牙根生长造成可见影响，但在30 d后均可减轻，45 d后均可消失。【结论】可用40%苄·二氯可溶性粉剂85 mg/m²＋56%2甲4氯钠可溶性粉剂300 mg/m²＋77.7%草甘膦铵盐可溶粒剂420 mg/m²组合对狗牙根草坪内的泽漆进行防除。

Control effects of three herbicides with different matching on Euphorbia helioscopia

【Objective】 The study was to explore the control effects of three kinds of herbicides in different matching on Euphorbia helioscopia,and to screen the best plan for control.【Method】 The three kinds of herbicides of 16 assemblages were used to control E.helioscopia that used orthogonal design on 77.7% Glycine,56% MCPA-Na and 40% bensulfuron-methyl+quinclorac in different matching.The efficacy indexes and control effects are observed in three,six,twelve,twenty and thirty days after pesticide application.And the influence on the growth of Cynodon dactylon are observed in three,six,twelve,twenty,thirty and forty-five days after pesticide application.【Result】 The 16 assemblages’ efficacy was greatly different(P<0.05).The efficacy of the three kinds of herbicides mixing is the best,and the efficacy of the two kinds of herbicides mixing is better than the single herbicide used on E.helioscopia.The efficacy index and the control effect are increasing with the respective concentration increase.The best efficacy of E.helioscopia control was the assemblage of 40% bensulfuron-methyl+quinclorac 85 mg/m2 and 56% MCPA-Na 300 mg/m2 and 77.7% Glycine 420 mg/m2.The efficacy indexes are 96.0% and 97.6%,and the control effects are 88.9% in three and six days after pesticide application,the efficacy index and the control effect is all 100% in twenty days after pesticide application,and the treated plants did not regenerate in thirty days after pesticide application.The influence on the growth of C.dactylon is visible tiny injuring or not with single herbicide used.The influence on the growth of C.dactylon is visible in three to twenty days after application,and reduced in thirty days after application,and recovered at forty-five days after application with two or three kinds of herbicides mixing used.【Conclusion】 The assemblage of 40% bensulfuron-methyl + quinclorac 85 mg/m2 and 56% MCPA-Na 300 mg/m2 and 77.7% Glycine 420 mg/m2 can control E.helioscopia in C.dactylon turf.