o:9708 Biocontrol Potential of Indigenous Beauveria bassiana Strain Against Ips typographus from Tara National Park Under Varying Temperature Regimes en Abstract: Entomopathogens are microbes that infect and cause pathogenesis in insects, often leading to the death of individual insects and, in some cases, the collapse of entire populations. More than 750 species of fungi have been documented as insect entomopathogens. Entomopathogenic fungi such as Beauveria bassiana play an important role in the biological control of insect populations. Environmental factors such as temperature and humidity significantly influence its growth and efficacy. This study focusses on B. bassiana isolated from Ips typographus populations in the Serbian Tara National Park. Laboratory experiments have shown that the optimum temperature for fungal growth is around 20°C. Furthermore, a mortality rate of 77.3% was observed when B. bassiana was applied to bark beetles, showing promising potential as a biological control agent under controlled conditions. Keywords: biopesticides, climate, efficacy, entomopathogenic fungi, spruce bark beetle, Picea abies, pest management 1552099 10.31298/sl.150.5-6.3 2026-06-03T12:27:57.033Z 44 yes 46 Marija Milosavljević 0000-0002-0208-5402 46 Mara Tabaković - Tošić 0000-0003-4436-3236 46 Snežana Stajić 0000-0001-9023-3542 46 Suzana Mitrović 0000-0003-1855-4418 46 Zlatan Radulović 0000-0003-2336-0255 46 Zoran Poduška 0000-0003-0593-0103 46 Bojan Gavrilović 0000-0001-8261-5954 application/pdf 2240813 https://unilib.phaidrabg.rs/o:9708 no yes 17 70 92000001 71A07 Šumarski list 150 (5-6) 219 227 Trg Mažuranića 11, 10000 Zagreb, Croatia Forestry Society of Croatia 2026