60%草甘膦·2甲4氯钠·氯氟吡氧乙酸异辛酯WP防除桉树林地杂草药效试验

Control Effect of Glyphosate·MCPA-Na·Fluroxypr-mepthyl 60% WP against Weeds in Eucalyptus Field

[目的]明确60%草甘膦·2甲4氯钠·氯氟吡氧乙酸异辛酯WP对桉树林地杂草的防治效果、最佳田间使用剂量及对桉树的安全性。[方法]采用行间定向茎叶喷雾施药,定期调查的方法进行田间药效试验。[结果]60%草甘膦·2甲4氯钠·氯氟吡氧乙酸异辛酯WP推荐剂量为1 687.5~2 250 g a.i./hm2,施药后30 d对杂草总体株防效、鲜质量防效均超过93%,防效优于50%草甘膦SP、56%2甲4氯钠SP和200 g/L氯氟吡氧乙酸EC单剂,且对桉树安全。[结论]60%草甘膦·2甲4氯钠·氯氟吡氧乙酸异辛酯WP能够有效防除桉树林地杂草并对桉树具有较好的安全性。

[Aims] The study is to confn＇m the control effect, optimum dosage and security of 60% WP of glyphosate, MCPA-Na and fluroxypr-mepthyl against weeds in eucalyptus field. [Methods] Field trials were carried out by using methods of inter-row directed stems-leaves spraying and regular survey. [Results] The recommended dose of glyphosate, MCPA-Na and fluroxypr-mepthyl 60% WP was 1 687.5-2 250 g a.i./ha, the controlling effects of glyphosate, MCPA-Na and fluroxypr-mepthyl 60% WP on plant and flesh weight were higher than 93% after 30 d of spraying, and showed better controlling effects compared to spraying single dose ofglyphosate SP 50%, MCPA-Na 56% SP and 200 g/L fluroxypyr. [Conclusions] Glyphosate .MCPA-Na .fluroxypr-mepthyl 60% WP shows good control to weeds in eucalyptus field and is safe on eucalyptus growth.