Raspberry
Raspberry Spur Blight
Didymella applanata
Fungus
In a Nutshell
- Blue or violet spots & spore blisters on the shoots.
- Bark bursts open.
- Early leaf drop.
Can also be found in
0 Crops
Raspberry
Symptoms
Blue to violet spots appear on the shoots and the bark bursts open. Subsequently, the spore cushions form blisters on the shoots. The plant drops its leaves early in the year. In spring the affected shoots do not sprout.
Recommendations
Organic Control
Remove infected shoots. After an infection, use a plant fortifier, so the plants are able to fight the fungi. You can choose more resilient varieties, such as Glen Moy, Glen Rosa, Julia, Malling Admiral or Leo.
Chemical Control
Fungicides based on Lime Sulfur or Captan/Fenhexamid mixtures can be used.
What caused it?
The pathogen enters the plant with humid spring weather and hibernates in the affected shoots.
Preventive Measures
- Balanced nutrition supply is important.
- Injuries should be avoided.
- Leave sufficient distance between plants.
- Apply plant fortifier.
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