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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
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
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.
Dear Ana, thank you for your inquiry. Identifying this hairy object is no easy task, but it appears to resemble a gall. There are several insect species that induce galls on oak trees. Generally, they belong to two groups: hymenoptera and diptera. This particular specimen resembles a gall induced by the Hymanoptera species a gall wasp, Neuroterus lanuginosus. However, it cannot be ruled out that other factors may be responsible, as the symptoms are not unequivocal. Wishing you a pleasant day, Milan Zubrik https://www.forestpests.eu/pest/neuroterus-lanuginosus
Thank you very much for your inquiry. Upon observation of the tree, there are signs of the presence of some species of Cerambycidae - longhorn beetles. However, from the picture provided, it is not possible to determine the exact species of the beetles. It is important to note that these beetles typically only play a minor role in tree decline, as many of them are strongly secondary pests that attack and inhabit weakened or damaged trees. Therefore, in this case, it is not possible to determine the exact reason for the mortality of the tree from the picture alone. Thank you very much and have a nice day! MZ