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 Andrea, Thank you for your inquiry. The information provided is not sufficient to determine the cause of the damage. If it is indeed an elm (the photograph does not make this entirely clear), it is worth noting that a whole group of bark beetle species from the genus Scolytus can affect elm trees. You can read more about them here: https://www.forestpests.eu/pest/scolytus-spp&rurl=YXRsYXMmYW1wO2ZpbHRlcj00OCZhbXA7cD00. However, other possible causes of the damage cannot be ruled out either. Have a nice day, M. Zúbrik
Dear Aliaksandr,
thank you for your question. According to the photo it is probably Brefeldia maxima, or Symphytocarpus amaurochaetoides. Without detailed laboratory analysis, but we are not completely sure.
Best regards,
V. Longauerová
Dear Aliaksandr,
thank you for your question. According to the photo it is probably Coniophora puteana. Without detailed laboratory analysis, but we are not completely sure.
Best regards,
Valeria Longauerová
Dear Mohamed, thank you for your request. There is a Diptera species in the picture, but it does not look like any known citrus pest. It is definitely not Ceratitis capitata, commonly known as the Mediterranean fruit fly or medfly, which is a very dangerous pest of citrus. In any case, it appears to have been attacked by an entomopathogenic fungus (possibly Beauveria bassiana), which likely killed it. Best regards, M. Zúbrik
Thank you for your interesting inquiry and the lovely photograph. It’s unfortunate that the leaf is dead (an autumn aspect), making the damage less visible. It strongly resembles the mite Aceria nervisequa faginea, but since I am not completely certain, I would place this in the category of ambiguously identified species. If this were in summer and the photo included the underside of the leaf, identification would be clearer. Thank you once again.With best regards M. Zubrik
Hello, thank you for your interesting inquiry. Such small holes are usually caused by small beetles that consume plant tissues to allow their reproductive organs to mature, a process known as maturation feeding. From these symptoms alone, it is not possible to determine the exact species involved. The most likely candidates are Chrysomela vigintipunctata or Lochmaea caprea, as these species are probably the most common in your area. With best regards M. Zubrik
Thank you for your inquiry. The image shows an insect larva from the order Hymenoptera, specifically from the suborder Symphyta – commonly known as sawflies. The larvae of these species feed on rose leaves, and in Europe, several similar species inhabit rose plants. They cause defoliation, which reduces the plant vitality and aesthetic value. The image is somewhat unclear, so we cannot confidently identify the exact species. It could potentially be the larva of Endelomyia aethiops. With best regards M. Zubrik
Dear Alessandra, Thank you for your inquiry. The tree in the picture appears to be a species of five-needle pine. Given the location, it may be Pinus cembra. Based on the photos provided, it is not entirely possible to determine the exact cause of the damage. The youngest needles appear to be mostly unaffected, while older needles are brown, which is a good sign. There are no visible symptoms of fungal pathogens on the needles, also a positive indicator. We assume this is likely a common response to unfavorable conditions, possibly due to recent weather patterns or summer conditions, combined with the natural shedding of older needles. Additionally, there appears to be an injury on the trunk with significant resin exudation, which could be contributing to the tree reduced vitality. However, this does not necessarily indicate a long-term decline, given the absence of pathogens, and the tree may still recover. With best regards M. Zubrik
Hello,
I think that tree species is spruce and galleries under the bark were made by Pityogenes chalcographus.
Circle exit holes in the wood are probably from Siricidae species.
Best regards
Jozef Vakula
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
