摘要:
为评估氟磺唑草胺对甘蔗田杂草防除效果及对后茬作物的安全性,采用农药田间药效试验法,测定480gL-1氟磺唑草胺悬浮剂播后芽前土壤处理对甘蔗田杂草的防除效果,并分析其对甘蔗和后茬作物水稻、玉米、上海青生长的影响,结果表明,各处理浓度对马唐、旱稗、牛筋草、石胡荽、裸柱菊、通泉草、胜红蓟、飘拂草、香附子等杂草15 d防效均达86%以上,30 d防效均达88%以上;而各处理浓度30 d鲜重防效达95%以上,各项防治指标均优于对照药莠去冿。药后约14个月种植后茬作物,对水稻、玉米和上海青3种后茬作物生长安全,对各后茬作物产量也没有影响。
关键词:
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氟磺唑草胺 /
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甘蔗 /
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杂草 /
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防效 /
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安全性
Abstract:
This study aimed to evaluate the weed-control efficiency of Flumetsulam for sugarcane plantation and effect of its application on succession crops in the field.The rate of 480 g1 Flumetsulam SC was applied in accordance to the pesticide-guidelines for the experimentation.Effects of the application on sugarcane and the succession crops of rice,corn and Shanghaiqing cabbage were determined.The results showed that the controlling efficiencies on major weeds,such as Digitaria sanguinalis(Linn.)Scop,Echinochloa crusgalli(L.)Beauv.var.hispidula(retz.)Hack,Eleusine indica(Linn.)Gaertn,Centipeda minima(Linn.)A.Br.et Aschers,Solva anthemifolia(Juss.)R.Br.,Mazus japonicus(Thumb.)O.Kuntze,Ageratum conzoides L.,Cardamine hirsute Linn,Polygonum aviculare L.,Fimbristylis aestuvalis(Retz)Vahlhirdute,Portulaca oleracea Linn.and Cyperus rotundus Linn.,were greater than 88% after a 15-day treatment,and 95% after a 30-day treatment.Furthermore,the fresh weight control efficency was more than 95% after a 30-day treatment.The three succession crops,i.e.,rice,corn and cabbage,grew normally in 14 months after the treatment.No significant difference on the crops'production was observed as compared to the control.
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