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Control Test of Grape Downy Mildew for Dimethomorph EW

and Wang Yi

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Abstract

The result of the field test of the two agents on grape downy mildew showed that 10% dimethomorph EW had good efficacy at 900 mL/hm2 and 600 mL/hm2, the average control effect at the 14 d after the 2nd time of spraying was as high as 83.3% and 84.6%, significantly better than 25% metalaxyl WP at 900 g/hm2, 10% dimethomorph EW at 150 mL/hm2 and 300 mL/hm2. There was no difference in the efficacy between 10% dimethomorph EW at 900 mL/hm2 and 600 mL/hm2. We recommend to use 10% dimethomorph EW at 600 mL/hm2.

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What this paper is about

The result of the field test of the two agents on grape downy mildew showed that 10% dimethomorph EW had good efficacy at 900 mL/hm2 and 600 mL/hm2, the average control effect at the 14 d after the 2nd time of spraying was as high as 83.3% and 84.6%, significantly better than 25% metalaxyl WP at 900 g/hm2, 10% dimethomorph EW at 150 mL/hm2 and 300 mL/hm2. There was no difference in the efficacy between 10% dimethomorph EW at 900 mL/hm2 and 600 mL/hm2. We recommend to use 10% dimethomorph EW at 600 mL/hm2.

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Available abstract

The result of the field test of the two agents on grape downy mildew showed that 10% dimethomorph EW had good efficacy at 900 mL/hm2 and 600 mL/hm2, the average control effect at the 14 d after the 2nd time of spraying was as high as 83.3% and 84.6%, significantly better than 25% metalaxyl WP at 900 g/hm2, 10% dimethomorph EW at 150 mL/hm2 and 300 mL/hm2. There was no difference in the efficacy between 10% dimethomorph EW at 900 mL/hm2 and 600 mL/hm2. We recommend to use 10% dimethomorph EW at 600 mL/hm2.

Key concepts: Downy mildew, Metalaxyl, Fungicide, Horticulture, Significant difference, Biology, Mathematics, Statistics

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