o:8848 Cynips Evident Conection with Climate-Meteorological Extreme Crises in 2024 on Sample Plot Level I - 38 (Mali Izvor) in East Serbia en Abstract: Insects gall wasps (Cynipid: Hymenoptera) are non-directly but, in a case of such a major number of species on one place are for sure incalculably valuable to man’s forest management. Usually, we think of them in a negative context, gall wasps attack the most important species in forest management (Quercus sp.). But without them, like without any link in any food chain, neither we, nether other organisms could not be for sure in role they have. They are a fundamental part of every forest ecosystem, especially in such a number of recognised and determinate species on one locality. Some of the characteristics are the direct production of certain recognisable for every species tree deformation (galls, here) and much important the control of populations of other harmful invertebrate species (including other often insects pest). Numerous taxa of Cynipid are in the trophic connection with oaks, like many of those are in with Quercus cerris L. as host plant this pair connected for more than two decades ago. It is becoming so obvious and characteristically nearby Mali Izvor. Most of the galls in this group are characterized by local swellings and a greater or less deformation of the affected plant part, though the distortion is not great enough to conceal the nature of the part affected. The deformation itself varies to an extent in marked shape, sometimes both, in measure upon the degree of infestation. In 2024 meteorological-climate factors were somehow appropriate to many pest species, this was so evident, on locality Keywords: Invasive, gall, Two Decade monitored abundance, Serbia. 1552100 978-99976-070-4-1 2025-12-25T08:33:54.749Z 44 yes 46 Renata GAGIĆ -SERDAR 0000-0001-9963-8132 Miroslava MARKOVIĆ person 0000-000208349-061x Suzana MITROVIĆ person 0000-0003-1855-4418 Ljubinko RAKONJAC person 0000-0002-8736-6771 Aleksandar LUČIĆ person 0000-0002-4473-1791 Goran ČEŠLJAR person 0000-0003-0438-1050 application/pdf 1615981 https://unilib.phaidrabg.rs/o:8848 no yes 1 70 92000004 71A07 Book of Abstracts [Електронски извор] / XVI International Scientific Agriculture Symposium "Agrosym 2025" 629 University of East Sarajevo 2025