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.
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
Hi Tina, than you for your requestt. This is caused by Andricus quercuscalicis, a small wasp species. It's called a Knopper gall. The female wasp lays her eggs on the acorn cup in May and injects a special fluid into it. In response, the oak tree forms a strange growth – a green, irregular lump about 2 cm long, known as a gall. Inside this gall, the wasp larva develops. With best regards Milan Zubrik
