Treatment of bark beetle attacked trees with entomopathogenic fungus Beauveria bassiana (Balsamo) Vuillemin

Autorzy

• Rastislav Jakuš Slovak Academy of Sciences, Institute of Forest Ecology
  Štúrova 2, 960 53 Zvolen, Slovak Republic,
  phone: +421 905 217 169, fax: +421 45 5334686
  e-mail: jakus@savzv.sk
• Miroslav Blaženec Slovak Academy of Sciences, Institute of Forest Ecology
  Štúrova 2, 960 53 Zvolen, Slovak Republic

Abstract

We carried out an experiment with using the entomopathogenic fungus Beauveria bassiana (Bals.) Vuill. for sanitation of active infested trees. We used 15 active infested trees from which 5 stems were treated with an insecticide, 5 were treated with solution of the tested entomopathogenic fungus and 5 were left as control. The used insecticide was pyretroid Fury 10 EW. We used a biopreparation based on the entomopathogenic fungus B. bassiana in form of wettable powder. The material was diluted. The suspension contained 107 spores of the tested entomopathogenic fungus in 1 ml. The suspension was applied across the whole stem surface. We succeeded to infect about 28.75% of Ips typographus L. individuals in the treated stems. The number of live individuals was comparable with the variant using the insecticide.

Keywords

• attacked trees
• Beauveria bassiana
• Ips typographus
• Norway spruce