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    Cherry scab [Venturia cerasi]

    Cherry scab is an important fungus disease in sour cherries. It can cause high yield losses, especially in rainy years. These losses can be as much as 30-40%. In sweet cherries, however, the severity of the disease is still limited.

     

    Pest Profile

    • Symptoms & Diagnosis

      Occurence

      Sweet and sour cherries may become infected with cherry scab.

      Pattern of damage

      The fruits become infected with the fungus and develop black spots 1 to 2 mm in size. In more severe infections the individual spots merge, giving rise to a thick hard layer. This causes the fruit to dry out and cracks may form. The symptoms on the fruits become visible in June. Approx. a week later, a closer inspection will reveal infection on the leaves as well: dull green, obtuse, barely visible spots develop on the upper sides of the leaves. Inconspicuous black streaks or spots can likewise be found on the shoots.