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American Gooseberry Mildew

Fungus

Podosphaera mors-uvae


In a Nutshell

  • Fungal covering on leaves, fruits or shoot tips.
  • Early leaf drop.
  • Reduced shoot growth.

Symptoms

An off-white fungal covering grows on the leaves, fruits and shoot tips of the gooseberry. On currant plants, the leaves of the shoot tips exhibit an off-white fungal covering on the underside that can also extent to the upper side. The results can be early leaf fall and reduced shoot growth.

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Hosts

Trigger

The fungus spreads on the plant via its spores. In summer, infection rates increase.

Organic Control

Cut back infected shoots. Use milk-water solutions, which function as natural fungicides (you can find tips in the main menu - information on plant diseases - preventive plant protection). Apply this solution every other day to the leaves.

Chemical Control

Fungicides with Sulfuric , Difenoconazole and Azoxystrobin can be used.

Preventive Measures

  • Plant more resilient varieties in areas with high occurrence of Powdery Mildew.
  • Ensure sufficient distance between the plants to allow for good ventilation.
  • Give sufficient light to plants.
  • Provide a balanced nutrient supply.
  • Avoid extreme temperature changes.

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