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 Jacopo, thank you for your inquiry. From the photos you provided, I do not see any clear signs of insect or fungal presence that could be causing the damage to your citrus plant. Maybe, its just becasue I do not see them, and some of them could be found in case of more cereful insepction...Unfortunately, it is not possible to determine from the pictures whether the plant was grown indoors or outdoors...in any case, I would not exclude the possibility of stress factors, such as physiological drought, overwatering, or similar issues. The symptoms may suggest this, but it is not possible to make a definite diagnosis based solely on these photographs. I wish you a nice day. Milan Zúbrik
Dear László, thank you for your question. From your photograph it is not possible to determine exactly what kind of damage it is. It appears that there was feeding by some aphid on the underside of the leaf. The damage somewhat resembles that caused on oak by Tuberculatus annulatus or by aphids of the genus Phylloxera. However, also some other species may cause similar problems...Best regards, Milan Zubrik
Hello, I found this branch last spring.
It looks like it contains traces of different bark beetles.
I can clearly see only one mating system with a nuptial chamber and others without the chamber.
Thank you in advance for your help!
Best regards
Antonella
Answer
Hello,I think it is a species of the genus Pityogenes, probably P. bidntatus or P. quadridens.Best regardsJozef Vakula
peeled of bark, underneath it is white stuff which mostly resembles chalk. a lot of dead beeches affected
Answer
Dear Froukje, it is somethng I have never seen before. Might be Hyphoderma, Botryobasidium (aureum), ... I dont know. Thanks for sharing the picture. Andrej
...again, we are not sure.
For sure those are exit holes but it is hard to say what species. If it id D-shaped it belongs to genus Agrilus (Buprestidae). If it is more round or elipsed in most cases those are Cemrabicidae. Also round exit holes on oaks belongs to woodwasps (Xiphydria longicollis). Juraj
Hello Fran. For sure it is genus Scolytus. In our conditions (Slovakia) very common on plums is Scolytus rugulosus (very small) or S. mali (much bigger). The differences betwen them you can see in our education video here https://youtu.be/i7rhrl33wEM. From your photo I am not able to determine which species it is. All the best, Juraj.
According to my opinion the insect is Phloeosinus but I am not sure if it is aubei or armatus or something else.
Answer
Dear Ioannis. It looks like a Phloeosinus gallery. My advice is: try to to dig out an imago and if you have some magnifying glass see the back part of elytra. P. armatus elytras looks totaly different as P. aubei. See these links: https://www.researchgate.net/publication/288363228_A_new_additional_record_of_Phloeosinus_armatus_Reitter_from_Italy_Coleoptera_Curculionidae_Scolytinae/figures?lo=1
https://www.dreamstime.com/bark-beetle-phloeosinus-aubei-bark-beetle-phloeosinus-aubei-isolated-white-background-image101436421
All the best, Juraj
Hi, this is a piece of wood that I found on the ground. In a coniferous forests (pine, fir). Thank you in advance. Best regards Antonella
Answer
Hello,the pictures show the galleries of long horne beetles (Cerambycidae). Probably species from the genus Tetropiu, e.g. Tetropiu fuscum. These are species whose larvae live on dead or weakened coniferous trees.Nice photos.
Best regardsJozef Vakula
Dear J.M., Thank you for your inquiry. From this photo, it appears that there has been a rather sudden dieback of the entire crown. It is not just a part of the crown that is affected — the whole crown is dying. This kind of rapid decline is not very common. In cases involving insect or fungal infestations, the decline is usually gradual, starting with the wilting and dieback of individual branches or parts of the crown. The tree typically shows signs of reduced vitality over a period of 1 to 3 years before it eventually dies.
In this case, the process seems to have progressed differently, suggesting a sudden death of the tree. Possible causes of such sudden decline include frost damage, severe overwatering or drought, aggressive root rot, chemical injury from herbicide application, or significant mechanical damage to the trunk.
From the photo provided, it is not possible to determine the exact cause. If you have more photos, please send them to milan.zubrik@nlcsk.org — I would be happy to take a closer look.
Best regards M. Zúbrik
Hi J.M. Thank you for your inquiry. These are exit holes – points where adult insects have emerged from their galleries under the bark to infest another tree. Based on the shape and size of the holes, it is likely that they belong to a representative of the family Curculionidae, most probably from the subfamily Scolytinae. However, an exact species identification cannot be made based on these features alone. Kind regards, M. Zúbrik
Hi, this is a piece of wood that I found on the ground, maybe pine or fir.
Answer
Hello,nice photos. The galleries probably belong to the species Pityophthorus pityographus, which is a polyphagous species. It is abundant in forests. It is not a pest, it develops on dead wood.Best regardsJozef Vakula
