60%霜霉·精甲霜水剂防治葡萄霜霉病

Control of Grape Downy Mildew by 60% Mixture of Frostweed and Metalaxil (Aqueous Solution)

为明确60%霜霉·精甲霜水剂防治葡萄霜霉病的效果、推荐使用剂量、使用关键技术,本实验在葡萄幼果期开始将配制好的药液均匀地喷施到叶片背面,每隔7~10 d喷施1次,共喷施3次,在葡萄采收前10 d进行调查。结果表明,60%霜霉·精甲霜水剂按110,90和70 g·亩剂量施药后,防效分别为87.66%,85.79%和71.08%,对照药剂防效为73.51%。60%霜霉·精甲霜水剂以90 g·亩使用剂量防治葡萄霜霉病效果明显,适合在葡萄生产上推广应用。

In order to clarify the effect of 60% mixture of Frostweed and Metalaxyl (aqueous solution) on grape downy mildew, recommended dosage, and uses, the solution of this fungicide was sprayed evenly thrice at an interval of 7—10 days on the lower surface of the leaves of the grapes at the young fruit stage, and the grape downy mildew was observed 10 days prior to harvesting. The results showed that the 60% mixture of Frostweed and Metalaxyl (aqueous solution) had control effects of 87.66 %, 85.79 % and 71.08 %, respectively at respective concentrations of 110,90 and 70 g·mu ^-1 (1/15 ha), and the control had a control effect of 73.51 % . The 60% mixture of Frostweed andMetalaxyl (aqueous solution) had obvious effect on grape downy mildew at a concentration of 90 g·mu^ -1 and is suitable for use in grape production.