Akademik Veri Yönetim Sistemi
Acta Parasitologica, cilt.71, sa.4, 2026 (SCI-Expanded, Scopus)
Background: Forests provide many ecological and economic functions, but they are increasingly exposed to the invasion of various harmful insects. The bark beetle Dendroctonus micans and pine processionary moth Thaumetopoea pityocampa are highly destructive insect pests that kill living trees, leading to significant reductions in forest productivity and widespread tree death. In addition to these, Glyphodes pyloalis is another tree pest that damages mulberries, which are economically important for silk yarn production. Method and Results: In this study, a strain (27b2) from Beauveria bassiana was isolated from the cambium pests D. micans and Ips sexdentatus, which were collected dead from their natural habitat. Then, it was identified by morphological and molecular tests. The isolates of B. bassiana secondary metabolites were extracted from its extracellular medium and mycelium with ethyl acetate and acetone and then the efficacy of crude extracts against insect pests (D. micans adults and larvae), (Glyphodes pyloalis larvae and T. pityocampa larvae) was evaluated at concentrations of 500, 2000, and 5000 ppm. Consequently, it was determined that the ethyl acetate and acetone extracts of B. bassiana 27b2 showed a 100% lethal effect on D. micans adults and larvae, while the acetone extract showed a 100% lethal effect on T. pityocampa larvae. Conclusion: The data suggest that the secondary metabolites of isolate 27b2 may be utilized as bio-pesticides for the control of these pests. Also, this is the first study examining the lethal effects of secondary metabolites extracted from B. bassiana on T. pityocampa, and D. micans.