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.
Thank you for your inquiry. This is Erysiphe platani, a fungus commonly known as plane tree powdery mildew or sycamore powdery mildew. It is an invasive species in Europe. While it typically does not cause serious problems, severe attacks can lead to tree decline and reduced plant vigor. Common fungicides may help, but repeated applications are often necessary. With best regards, M. Zubrik.
Hello, I have a problem with the gales in the images! I thought it could be Dryomyia circinans, but after a while the adults appeared, they are clearly Hymenoptera. Can you help me with some suggestions?
I also have another type of gale, I am sending a new message. Thank you!
Answer
Dear Ana, thank you for your question. Yes, galls on the leaves looks like those caused by Dryomyia circinans. However, I see at least one gall that belongs to Neuroterus lanuginosus, which is Hymenoptera. The wasp on your picture is definitively not a Neuroterus species. I do not know, what a species it is. Maybe some prasitoids or some another gall wasp... Best ragards M. Zubrik
Dear Ana, thank you for your inquiry. Identifying this hairy object is no easy task, but it appears to resemble a gall. There are several insect species that induce galls on oak trees. Generally, they belong to two groups: hymenoptera and diptera. This particular specimen resembles a gall induced by the Hymanoptera species a gall wasp, Neuroterus lanuginosus. However, it cannot be ruled out that other factors may be responsible, as the symptoms are not unequivocal. Wishing you a pleasant day, Milan Zubrik https://www.forestpests.eu/pest/neuroterus-lanuginosus
Hello. In the picture is not an ash branch but branch from coniferous tree.
It looks like the gallery created by Pityogenes bidentatus or another Pityogenes species.
Best regards JG.
