New braconid parasitoids (Hymenoptera: Braconidae) on bark beetles in Ihtimanska Sredna Gora Mountain, Bulgaria

By

Belilov, Sevdalin
Georgiev, Georgi

Type

Article

Date of Publication

2023-11-22

Original Publication

Silva Balcanica

Volume

24

Series / Issue

Issue: 2

Pages

101--106

Subjects

Bark beetles , Braconidae , Bulgaria , Coeloides bostrichorum , Dendrosoter middendorffi , Parasitism

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Forest Research Institute - Bulgarian Academy of Sciences (FRI-BAS) [2001]-

Identifiers

DOI: 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%.