Cucurbit downy mildew

cucurbit downy mildew
cucurbit downy mildew

CLASSIFICATION

Chromista, Peronosporea, Peronosporaceae, downy mildew, Pseudoperonospora, Pseudoperonospora cubensis

ABOUT

Downy mildew of cucurbits is a plant disease caused by the pathogen Pseudoperonospora cubensis. Typical symptoms include small yellow spots or water-soaked lesions on top of the leaves, which can later turn brown in the center.

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 cyazofamid (GHS09: Environmental hazard).

    • If necessary, apply fungicide containing propamocarb hydrochloride (GHS07: Harmful).

  • 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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