Yerli entomopatojenik fungus izolatları ile üç ticari entomopatojenik fungus ürününün Sitophilus oryzae L. ve Tribolium confusum du Val üzerindeki etkinlikleri

Abstract

In the present study, a total of 17 indigenous entomopathogenic fungal (EPF) isolates (Beauveria bassiana (Bals.) Vuill. – 14, Clonostachys rosea (Link) Schroers – 2, Isaria farinosa (Holmsk.) Fr. – 1) obtained from soil samples collected from Antalya province (southwestern part of Turkey) and three commercial EPF products [i.e. Priority® (Paecilomyces fumosoroseus), Nibortem® (Verticillium lecanii) and Nostalgist® (Beauveria bassiana)] were evaluated for their efficacy against the 7–10-day-old adults of Sitophilus oryzae L. (Coleoptera: Curculionidae) and Tribolium confusum du Val. (Col.: Tenebrionidae) under laboratory conditions. All the isolates and products were tested at 1 × 107 conidia/ml suspensions against the both insect species. The results from the single-dose pathogenicity assays showed that three B. bassiana isolates (BbDm-1, BbKp-1 and BbMp-1) caused mortalities 96.7%, 100% and 93.3% in S. oryzae, and 100%, 100% and 96.7% in T. confusum, respectively, 14 days after inoculation whereas all three commercial products achieved mortalities ranging from 56.7% and 63.3% in S. oryzae and from 56.7% and 66.7% in T. confurusum. In addition, the results from molecular phylogenetic analyses based on the ITS region sequence indicated that the three effective B. bassiana isolates (BbDm-1, BbKp-1 and BbMp-1) showed a high similarity (99%) with other B. bassiana isolates in GenBank. Overall results suggest that these three B. bassiana isolates have potential for management of S. oryzae and T. confusum.