Login | Registration | List of contributors

Requests to determine the cause of damage

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.

Filter reset

Rejected requests are not displayed. You have been notified by email that your application has been denied.

 

A - nie je v databázeA - nie je v databázeA - nie je v databáze
Number: 6865
Received 1.9.2025
In progress: 1 days
Date of occurrence: 5.9.2025
Significance:
Discussion
From: Sajti
Assigned: M. Zúbrik
Country: Hungary

Question

I often see this type of leaf mine on black poplar (Populus nigra), but also on Populus nigra cv. Italica. I noticed it a few weeks ago, but all the leaf mines are already empty. Sometimes I only find the initial short, light green gallery, while the blotch part has already has detached (e.g. here: https://www.inaturalist.org/observations/311079069). In the attached photo you can still see the whole leaf mine (both parts). Do you think *Japanagromyza salicifolii* is the culprit? I’m uncertain, since I couldn’t find any records of this species from Central Europe.

Answer

Dear Sajti, thank you for your very interesting question. Under the bark of young poplar shoots there is a mine – the tissue has been eaten by the larva of a small moth. Several species can behave in a similar way, but in your case it is most likely the species Phyllocnistis extrematrix. Wishing you a nice day, best regards, M. Zúbrik
Number of votes for this answer: 0

Pest

A - nie je v databáze

A - nie je v databáze

Received: 1.9.2025
Wood: Poplar
Number: 6865
Date of occurrence: 5.9.2025
Discussion

Add comment:

Back to top