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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.

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Code
Date
Assigned
Status
Days from submission
7442
10.2.2026
J. Galko
In progress
17

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A - This species is not in the database yet
A - This species is not in the database yet
A - This species is not in the database yet
Number: 7113
Received 2.11.2025
In progress: 16 days
Date of occurrence: 30.10.2025
Significance:
Discussion
Assigned: J. Galko
Country: The Netherlands

Question

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
Number of votes for this answer: 0

Pest

A - This species is not in the database yet

A - This species is not in the database yet

A - This species is not in the database yet

A - This species is not in the database yet

Received: 2.11.2025
Wood: Chestnut
Number: 7113
Date of occurrence: 30.10.2025
Discussion

Add comment: A - This species is not in the database yet

A - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sure
Number: 7110
Received 30.10.2025
In progress: 0 days
Date of occurrence: 30.10.2025
Significance:
Discussion
From: froukje
Assigned: A. Kunca
Country: The Netherlands

Question

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
Number of votes for this answer: 0

Pest

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

Received: 30.10.2025
Wood: Beech
Number: 7110
Date of occurrence: 30.10.2025
Discussion

Add comment: A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sureA - Ambiguously determined, we are not sureA - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sure
Number: 5138
Received 3.10.2024
In progress: 6 days
Date of occurrence: 3.10.2024
Significance:
Discussion
From: froukje
Assigned: J. Vakula
Country: The Netherlands

Question

An image which is mostly 4-5 mother galleries rather deep in the sapwood. no larvae galleries in the sapwood. the tree was cut in half, this was the top. it was more frequent in the top of the tree. i think ips amitinus, but it does not occur in NL?

Answer

Hello, I think that it is maturation feeding of Ips species. Probably Ips typographus. Galleries with maturation feeding are often on thinner part of trunks. Ips amitinus is less frequent and abundant. Best regardsJozef Vakula
Number of votes for this answer: 0

Pest

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

Received: 3.10.2024
Wood: Spruce
Number: 5138
Date of occurrence: 3.10.2024
Discussion

Add comment: A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sureA - Ambiguously determined, we are not sureA - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sure
Number: 4935
Received 8.8.2024
In progress: 1 days
Date of occurrence: 8.8.2024
Significance:
Discussion
From: froukje
Assigned: J. Vakula
Country: The Netherlands

Question

looks like a gallery from a very small jewel beetle. seems it does not pupate in the wood. exit hole about 2 mm. could not determine if tree was abies alba or pseudotsuga menziesii. only seen on smaller dead trees. not on the stem of big trees.

Answer

Hello Mr. Froukje, nice photos. In the pictures there are galleries under the bark of the Cerambycidae, probably Callidium violaceum. The exit hole belongs to Trypodendron lineatum. Best regards Jozef Vakula  
Number of votes for this answer: 0

Pest

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

Received: 8.8.2024
Wood: Fir
Number: 4935
Date of occurrence: 8.8.2024
Discussion

Add comment: A - Ambiguously determined, we are not sure

Number: 4922
Received 5.8.2024
In progress: 1 days
Date of occurrence: 25.7.2024
Significance:
Discussion
Assigned: J. Galko
Country: The Netherlands

Question

I think it is callidium aeneum. A short larva tunnel goes to a excavated large round with sharp edges. Clearly sunken into the wood. In the middle is a hole about 1 cm wide. Occurances found on pine and Norway spruce. Often together with callidium violaceum. Found very often, but less often then c. Violaceum. On wristsize branches (4-10 cm thickness or so)

Answer

Hello. Yes, the gallery looks like the gallery system of Callidium aeneum. This species is so far not in our database. Best regards JG
Number of votes for this answer: 0

Pest

A - nie je v databáze

A - nie je v databáze

Received: 5.8.2024
Wood: Different tree species
Number: 4922
Date of occurrence: 25.7.2024
Discussion

Add comment:

A - This species is not in the database yet
A - This species is not in the database yetA - This species is not in the database yetA - This species is not in the database yet
A - This species is not in the database yet
Number: 4920
Received 5.8.2024
In progress: 0 days
Date of occurrence: 5.8.2024
Significance:
Discussion
From: froukje
Assigned: M. Zúbrik
Country: The Netherlands

Question

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
Number of votes for this answer: 0

Pest

A - This species is not in the database yet

A - This species is not in the database yet

A - This species is not in the database yet

A - This species is not in the database yet

Received: 5.8.2024
Wood: Douglas Fir
Number: 4920
Date of occurrence: 5.8.2024
Discussion

Add comment: A - This species is not in the database yet

Sinuate pear tree borer
Polník stromovýPolník stromovýPolník stromový
Sinuate pear tree borer
Number: 4531
Received 16.5.2024
In progress: 0 days
Date of occurrence: 16.5.2024
Significance: Less harmful
Discussion
From: froukje
Assigned: M. Zúbrik
Country: The Netherlands

Question

on Mespilus germanica on thin part trunk/first branches. Lg on pictures excavated by woodpeckers. LG zigzagging deeply sunken in the wood, severe damage, but tree still alive. d-shape exit holes 3,5mm wide. not all exit holes are neatly d-shaped.

Answer

Dear Froukje, thanks for this question and a nice pictures. Yes, the gallery seems to me very much like gallery system of Agrilus sinuatus. This species is very probably the author of this gallery. With best regards M. Zubrik
Number of votes for this answer: 0

Pest

Sinuate pear tree borer

Agrilus sinuatus

Sinuate pear tree borer

Agrilus sinuatus

hmyz

Received: 16.5.2024
Wood: Different tree species
Number: 4531
Date of occurrence: 16.5.2024
Discussion

Add comment: Sinuate pear tree borer

Agrilus ater
Krasoň topoľovýKrasoň topoľovýKrasoň topoľový
Agrilus ater
Number: 4525
Received 15.5.2024
In progress: 0 days
Date of occurrence: 15.5.2024
Significance: Less harmful
Discussion
From: froukje
Assigned: M. Zúbrik
Country: The Netherlands

Question

large feeding galleries, d-shape exit holes. Could only be agrilus ater? by description agrilus suvurovi could fit. but cannot find a trace or even acknowledgement of existence in the netherlands. is it a new species?

Answer

Thank you for your request and a nice pictures. Yes, it is absolutely sure, these galleries and exit holes belongs to some species from the genus Agrilus. I think it could be A. ater, that is already known from Netherlands. See: https://www.tuite.nl/iwg/Coleoptera/Agrilus_ater2017.pdf. Best regards M. Zubrik
Number of votes for this answer: 0

Pest

Agrilus ater

Agrilus ater

Agrilus ater

Agrilus ater

hmyz

Received: 15.5.2024
Wood: Poplar
Number: 4525
Date of occurrence: 15.5.2024
Discussion

Add comment: Agrilus ater

A - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sureA - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sure
Number: 4523
Received 15.5.2024
In progress: 1 days
Date of occurrence: 15.5.2024
Significance:
Discussion
From: froukje
Assigned: J. Vakula
Country: The Netherlands

Question

mating room visible. single mothergallery often hooked shape up to 10cm, 1mm wide. larvagalleries far apart, about 3,5 cm long, 1mm wide. maybe have been a different tree: like abies.

Answer

Hello Froukje,thank you for very nice photos and detailed description with dimensions of galleries. I think that it is gallery of genus Pityophthorus. If it is spruce may be P. exsculptus. However, an exact determination is not possible. Many galleries look alike, and if they are older, it is very problematic to determine the species or even the genus. If possible, please try to determine the exact species of host tree in the future and send several photos of the entire gallery. Fresh galleries are more suitable for determination.Best regardsJozef
Number of votes for this answer: 0

Pest

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

hmyz

Received: 15.5.2024
Wood: Spruce
Number: 4523
Date of occurrence: 15.5.2024
Discussion

Add comment: A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sure
Number: 4522
Received 15.5.2024
In progress: 1 days
Date of occurrence: 15.5.2024
Significance:
Discussion
Assigned: M. Zúbrik
Country: The Netherlands

Question

Callidium aeneum?

Answer

Dear Froukje, thanks for your inquiry. I want to encourage you to map species using this internet tool and send us your nice pictures. Although it seems that we are not able to identify most of your questions down to the species level. We are not taxonomists. We are a group of people who deal with forest and tree protection. Our goal is to help the owner recognize the cause of the damage, wilting or death of the tree. So I want to help him to take such precautions that will save the given tree, or prevent it from attacking next trees in the vicinity. From the point of view of forest or tree protection, it is not always necessary to recognize exactly what kind of beetle it is. Knowing that it is a bark beetle and not a fungal pathogen is often enough for the tree owner to take apropriate control measures. Just as the determination of species based on external morphological signs is complicated, the identification of galleries or feeding traces is even more difficult. Only a small part of galleries, wounds, damage, etc. it has such signs, on the basis of which the cause of the damage can be clearly determined totally exactly. Not all they are fully species-typical. I have some suggestions for you if you want your requests to be more exactly determined. Please try to send more pictures of dying trees, not totally dead trees. Try to capture more different symptoms, however remember, that to have a picture of the adults (in the case of insects) is always the best for species identification. I think that galleriess on the pictures were caused by some Cerambycidae species. They look very much like some Callidium galleries, but I can not say which exact species it is. With best regards, M. Zúbrik
Number of votes for this answer: 0

Pest

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

hmyz

Received: 15.5.2024
Wood: Spruce
Number: 4522
Date of occurrence: 15.5.2024
Discussion

Add comment: A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sureA - Ambiguously determined, we are not sureA - Ambiguously determined, we are not sure
A - Ambiguously determined, we are not sure
Number: 4518
Received 15.5.2024
In progress: 0 days
Date of occurrence: 15.5.2024
Significance:
Discussion
Assigned: J. Galko
Country: The Netherlands

Question

Cryptomeria japonica,broke in half due to another tree falling on it. it is the only one in a group of 9 with it. Infestation only above breakpoint, also in branches >3cm. gallery appr 20 cm long, up to 1cm, entrance hole only 4 mm. lamprodila festiva?

Answer

Hello. Gallery looks simalar to Lamprodila festiva gallery system but we are not sure. Simalar gallery can create another Buprestids or Cerambycids species. Some Cerambycids on Cryptomeria japonica are decribed here (https://avesis.gazi.edu.tr/yayin/b4979d05-8d63-4f42-8ae9-6c2d6236bb3c/cupressaceae-and-taxaceae-taxa-pinopsida-cupressales-associated-with-longicorn-beetle-taxa-coleoptera-cerambycidae-of-turkey/document.pdf). All the best, JG.
Number of votes for this answer: 0

Pest

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

A - Ambiguously determined, we are not sure

hmyz

Received: 15.5.2024
Wood: Cypress
Number: 4518
Date of occurrence: 15.5.2024
Discussion

Add comment: A - Ambiguously determined, we are not sure

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