Downy mildew

downy mildew
downy mildew

CLASSIFICATION

Chromista, Peronosporea, Peronosporaceae

ABOUT

Downy mildew is a plant disease caused by pathogens belonging to the Peronosporaceae family. Typical symptoms are large, angular yellow spots on top of the leaves, which turn brown later on.

How to treat?

  • microscopeBiological

    • If possible remove and destroy the infected parts of the plant. Burn it, toss it into the garbage, or bury it deeply. Do not compost.

    • If the infection is widespread, remove and destroy the infected plant. Burn it, toss it into the garbage, or bury it deeply. Do not compost.

    • Apply ecological products for plant protection (e.g. baking soda, hydrogen peroxide, copper spray).

  • pillChemical

    • If necessary, apply fungicide containing propamocarb hydrochloride (GHS07: Harmful) (on onion, cucumber, and potatoes).

    • If necessary, apply fungicide containing metalaxyl (GHS07: Harmful) (on garden crops).

    • If necessary, apply fungicide containing fluopicolide (GHS09: Environmental hazard).

  • syringeDisease prevention

    • Water the soil surface, avoid watering leaves.

    • Improve the air circulation around the plant (e.g. by pruning excess foliage or increasing the spacing between plants).

    • Ensure having good soil drainage to avoid overwatering.

    • Use resistant species and cultivars as well as healthy, certified seeds and seedlings.

    • If necessary, use chemical products as a prevention (e.g. copper-based spray). These chemicals may lead to the development of resistant strains.

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