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Here you can request to determine the cause of the damage. You can view the requests of other users and sort them according to the selected criteria. In addition, you can get information about your request, and you can follow the progress of its current state. If your application was not approved, it had probably been because it was impossible to identify the damage based on the sent photos or because the application does not address our topic - determining the pests of trees and shrubs. We will inform you about the status of your application by email.

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Dothistroma needle blight
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Dothistroma needle blight
Number: 6707
Received 11.8.2025
In progress: 3 days
Date of occurrence: 11.8.2025
Significance: Very harmful
Discussion
Assigned: V. Longauerová
Country: Italy

Question

Answer

Dear Alessandro, Thank you for your question. Based on the photo, the pathogen appears to be Dothistroma septosporum. Needle infection occurs from early May to late September. The first symptoms are pale yellow to brown spots resembling damage caused by sucking insects. By November, the infected needles have turned brown, and by the end of December, brick-red spots or even transverse stripes may be visible on the brown needles. The asexual stage of the fungus is Mycosphaerella pini. Best regards. Valeria 
Number of votes for this answer: 0

Pest

Dothistroma needle blight

Dothistroma septosporum

Dothistroma needle blight

Dothistroma septosporum

huby

Received: 11.8.2025
Wood: Pine
Number: 6707
Date of occurrence: 11.8.2025
Discussion

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