油菜田化学除草剂筛选

Screening of Chemical Herbicides in Rape Field

为筛选出油菜田安全、高效除草剂,指导生产实践,特进行了田间小区试验。试验结果表明:精喹禾灵和高效氟吡甲禾灵对禾本科杂草看麦娘的防除效果优良;氨氯吡啶酸对阔叶杂草牛繁缕/雀舌草、碎米荠、稻槎菜的防除效果优良;二氯吡啶酸仅对稻槎菜高效;草除灵仅对牛繁缕/雀舌草高效。油菜田化学防除禾本科杂草看麦娘时,可选择10%精喹禾灵乳油36 g/667 m^2或108 g/L高效氟吡甲禾灵乳油33 mL/667m^2;防除阔叶杂草牛繁缕/雀舌草、碎米荠、稻槎菜时,建议选择30%氨氯吡啶酸·二氯吡啶酸水剂30 g/667m^2;在移栽油菜活株后,杂草3~6叶期,茎叶喷雾施药一次,即可达到高效防除杂草、提高油菜产量的目的。

In order to screen out safe and efficient herbicides suitable for rape production and give practical guidance,we had carried out the field plot experiments.Results showed that quizalofop-P-ethyl and haloxyfop-P-methyl produced good control effects on the grass weed Alopecurus aequalis.Picloram was very effective against broadleaf weeds Malachium aquaticum/Stellaria uliginosa,Cardamine hirsuta L.,and Lapsana apogonoides.Clopyralid just produced a good control effect on Lapsana apogonoides.Benazolin-ethyl only had good control effects on Malachium aquaticum/Stellaria uliginosa.540 g/hm^2 of 10%quizalofop-P-ethyl EC or 495 mL/hm^2 of haloxyfop-P-methyl(108g/L)could be used to control Alopecurus aequalis,450 g/hm^2 of 30%picloram·clopyralid AS could be used to control above broadleaf weeds in rape field.So,the aim of efficiently controlling weeds and increasing the yield of rape could be achieved by spraying stems and leaves at 3-6 leaf stage of weeds after transplanted rape regrowth.