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.
On chestnut, above 2 meters. Looks like bark beetle, with 3 up to 6 mother galleries from central point.
No black color or entrance holes like hylecoetus dermestoides. What could it be?
Answer
Dear Froukje. Thank you for this interesting findings, but sorry I dont really know what bark beetle is able to make such gallery. Kind, Juraj
Recurring every year, starting from late July with fast deterioration of the foliage towards autumn.
Answer
Dear Piotr, thank you for your question. In autumn, this kind of leaf drop can be partly natural/seasonal, but it may also be contributed to by foliar fungal pathogens—for example, Phyllosticta magnoliae or related species.
Best regards, Milan Zubrik
Insect eggs located on the trunk of plum shrub (close to the ground level)
Answer
Dear Piotr, thank you for your inquiry. The insect in the photo is a scale insect, most likely Sphaerolecanium prunastri, which commonly occurs on plum trees. Best regards, Milan Zubrik
Hello,on the pisture 1 is larvae from family Raphidiidae "snakeflies". They are insect predators. On fig. 4 is head of larvae from family Cerambycidae "longhorned beetle".
Best regardsJozef Vakula
Dear Benedetta, thank you for your question. The picture shows an imago – an adult moth named Dysgonia algira. It is not considered a pest; the larvae usually live on willows or raspberries. Best regards, M. Zubrik
Thank you for your inquiry. It appears to be a rather unspecific symptom, and therefore it is difficult to identify the exact cause of this type of damage. Damage by slugs is one possibility, but other causes cannot be ruled out. We are unable to determine the precise cause based on the photograph.
Best regards, M. Zúbrik
Hi Jer. Possibly it is Taphrorychus villifrons but I am not sure. Here is our video about this species: https://youtu.be/6uDaHUna4Pk?si=TmbBb5Dp0oBTaIv7.
Best regards, Juraj
Discolouring spots on the needles. light green first then blue/black. It looks like chrysomyxa, but that does not occur on douglas? some sort of snout beetle?
Answer
Dear froukje, thank you for your inquiry. I have noticed some symptoms that suggest the presence of Douglas-fir needle midge, Contarinia pseudotsugae. This species is not native to Europe and should occur in your area, as it was already introduced to Europe from NA. Further investigation will be necessary to fully confirm its presence. With best regards, M. Zubrik
