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 Sverker, this is a larva of some species of a beetle from the group of Cetoniinae. Larvae of these species are not harmful as they live in dead wood. Adults can feed on fruit and flowers and can make some injuries. Wish you have a nice day. M. Zubrik
One can see the little larva if we cut the galle in the middle
Answer
Dear Marie, thank you for your inquiry. This is a gall caused by the small hymenopteran species Andricus quercuscalicis, known as the Knopper gall. The female of this small wasp lays eggs on the acorn cup in May, injecting a special liquid inside. As a result, the oak forms a specific neoplasm — a very irregular, approximately 2 cm long, green lump (gall) — in which the larva develops. The gall seems to overgrow the acorn cup and sometimes even absorbs the entire acorn. This prevents the acorn from developing normally and causes it to lose its ability to germinate. It can damage up to 70-80% of the harvest in localized areas. Damaged acorns fall off prematurely. With best regards, M. Zubrik
Škodca bol jak na Višniach, Moruši ale aj Jabloni.
Answer
Dobrý deň, ďakujeme za dotaz. Je to spriadač americký, Hyphantria cunea. Pomerne bežný škodca na ovocných stromoch. Odporúčame vetvy s húsenicami odstrihnúť a spáliť. Pri veľmi intenzívnom napadnutí býva účinná aplikácia insekticídov. S pozdravom M. Zúbrik
Neviem identifikovať dobre farbu plodnice zvrchu, vyzerá z časti tmavá a z časti biela a zo spodku celá biela. Huba sa nachádza na strome na ulici v okrajovej časti mesta. Viete mi prosím poradiť čo by to mohlo byť? vopred ďakujem za odpoveď.
Answer
Myslím, že ide o plodnice huby Perenniporia fraxinea. https://www.skodcoviadrevin.sk/skodca/porovnik-jasenovy
AK.
Dear Jer, thanks for your request. This looks like a gallery causes by the early stage of larva of the beele Coraebus fasciatus, also know under the name Coraebus florentinus. It can be serious pests of oak forests. With best regards M. Zubrik
Vzhľadom na tvar požerku sa nedá uplne jednoznačne identifikovať pôvodca poškodenia. Po zvážení možností a miesta nálezu som to zaradil k fuzáčovi bukovému. MZ
