唑嘧磺草胺、丙炔氟草胺与乙草胺混用的联合作用类型及对大豆田杂草的活性

Type of joint effect and herbicidal activity in soybean field of the combination of flumetsulam,flumioxazin and acetochlor

为明确唑嘧磺草胺、丙炔氟草胺与乙草胺混用的联合作用特性及其对大豆田杂草的防除效果,采用温室盆栽法和田间药效试验,分别评价了混配组方的联合作用类型及对大豆田杂草的防除效果。温室盆栽试验结果表明:唑嘧磺草胺、丙炔氟草胺与乙草胺混用对稗草、马唐和苘麻的联合作用类型为相加作用,对反枝苋为相加或增效作用;当唑嘧磺草胺、丙炔氟草胺和乙草胺以质量比2:3:45混用时,对反枝苋的增效作用最强。田间药效试验结果显示:唑嘧磺草胺、丙炔氟草胺和乙草胺以质量比2:3:45混用,当用量为有效成分800和1000 g/hm2时,可有效控制大豆田中杂草的为害,且对大豆安全。

To study the combined effect and herbicidal activity in soybean field of the combination of flumioxazin,flumetsulam and acetochlor,pot culture experiment and field efficacy tests were adopted to evaluate the type of the joint effect and the control efficacy on weeds in soybean fields of the mixtures respectively.The results of pot culture experiments showed that the type of joint effect was additive for the control of E.crusgalli,D.sanguinalis and A.theophrasti,and additive or synergistic for the control of A.retroflexus using the combination of flumetsulam,flumioxazin and acetochlor.And when the mass ratio was 2:3:45,the synergism of the mixtures was the highest for the control of A.retroflexus.The results of field experiments showed that the combination of flumetsulam,flumioxazin and acetochlor with the mass ratio of 2:3:45 had good efficacy against weeds in soybean fileds and was safe to soybean when the dosages of the active ingredients were 800 and 1000 g/hm2.