Silva Balcanica 24(2): 101-106, doi: 10.3897/silvabalcanica.24.e115809
New braconid parasitoids (Hymenoptera: Braconidae) on bark beetles in Ihtimanska Sredna Gora Mountain, Bulgaria
Sevdalin Belilov‡, Georgi Georgiev‡‡ Forest Research Institute, Sofia, Bulgaria
Corresponding author: Georgi Georgiev ( ggeorgiev.fri@gmail.com ) Academic editor: Margarita Georgieva © Sevdalin Belilov, Georgi Georgiev. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Citation:
Belilov S, Georgiev G (2023) New braconid parasitoids (Hymenoptera: Braconidae) on bark beetles in Ihtimanska Sredna Gora Mountain, Bulgaria. Silva Balcanica 24(2): 101-106. https://doi.org/10.3897/silvabalcanica.24.e115809 |  |
Abstract
In 2020, two braconid species (Hymenoptera: Braconidae) were found as parasitoids of bark beetles in Pinus sylvestris plantations in Ihtimanska Sredna Gora Mt. Coeloides bostrichorum Giraud was reared from stem samples attacked by Tomicus piniperda and Tomicus minor in the region of Krushovitsa vill. (State Forestry Enterprise Elin Pelin), and Dendrosoter middendorffi (Ratzeburg) – by Ips acuminatus, Pityophthorus pityographus and Pityogenes bistridentatus in the region of Krushovitsa vill. and Golema Rakovitsa vill. (State Game Enterprise Aramliets). Coeloides bostrichorum caused 7.4% mortality of T. piniperda and T. minor, and Dendrosoter middendorffi – 5.6-12.5% of Ips acuminatus, 5.6% of P. bistridentatus, and 2.8% of I. acuminatus, P. pityographus and P. bistridentatus. In the total braconid parasitoid complex, D. middendorffi was the dominant species with a relative share of 87.5%.
Keywords
Braconidae, Coeloides bostrichorum, Dendrosoter middendorffi, bark beetles, parasitism, Bulgaria