1. Biocontrol of Dendroctonus micans using predators
Jakub Horák

2. Great Spruce Bark Beetle (Dendroctonus micans)
Biocontrol
Jakub Horák
Great Spruce Bark Beetle (Dendroctonus micans)
Our biggest bark beetle (♂6 mm; ♀8 mm).

3. Great Spruce Bark Beetle (Dendroctonus micans)
Biocontrol
Jakub Horák
Great Spruce Bark Beetle (Dendroctonus micans)
Our biggest bark beetle (♂6 mm; ♀8 mm).
Association with spruce, often exotic.
commons.wikimedia.org
en.wikipedia.org

4. Great Spruce Bark Beetle (Dendroctonus micans)
Biocontrol
Jakub Horák
Great Spruce Bark Beetle (Dendroctonus micans)
Our biggest bark beetle (♂6 mm; ♀8 mm).
Association with spruce, often exotic.
Attack of big trees in summer, especially insignificantly damaged.
mfr-foret.com

5. Great Spruce Bark Beetle (Dendroctonus micans)
Biocontrol
Jakub Horák
Great Spruce Bark Beetle (Dendroctonus micans)
Our biggest bark beetle (♂6 mm; ♀8 mm).
Association with spruce, often exotic.
Attack of big trees in summer, especially insignificantly damaged.
Tree might not die.

6. Great Spruce Bark Beetle (Dendroctonus micans)
Biocontrol
Jakub Horák
Great Spruce Bark Beetle (Dendroctonus micans)
Our biggest bark beetle (♂6 mm; ♀8 mm).
Association with spruce, often exotic.
Attack of big trees in summer, especially insignificantly damaged.
Tree might not die.
Maturity feeding also on pine.
atlasposkozeni.mendelu.cz

7. Great Spruce Bark Beetle (Dendroctonus micans)
Biocontrol
Jakub Horák
Great Spruce Bark Beetle (Dendroctonus micans)
Our biggest bark beetle (♂6 mm; ♀8 mm).
Association with spruce, often exotic.
Attack of big trees in summer, especially insignificantly damaged.
Tree might not die.
Maturity feeding also on pine.
Two-year development, reproduction similar to ambrosia beetles.
lubies.ulb.ac.be

8. Great Spruce Bark Beetle (Dendroctonus micans)
Biocontrol
Jakub Horák
Great Spruce Bark Beetle (Dendroctonus micans)
In the Czech Republic of quite low interest.
Lukášová et al. 2014

9. Great Spruce Bark Beetle (Dendroctonus micans)
Biocontrol
Jakub Horák
Great Spruce Bark Beetle (Dendroctonus micans)
In the Czech Republic of quite low interest.
Trap trees are not effective.

10. Great Spruce Bark Beetle (Dendroctonus micans)
Biocontrol
Jakub Horák
Great Spruce Bark Beetle (Dendroctonus micans)
In the Czech Republic of quite low interest.
Trap trees are not effective.
Pheromones too.
vysocina.lesnictvi.cz

11. Biocontrol
Jakub Horák
History
The origin of invasible populations of the Great Spruce Bark Beetle is not well known, possibly from Siberia.

12. Biocontrol
Jakub Horák
History
The origin of invasible populations of the Great Spruce Bark Beetle is not well known, possibly from Siberia.
Increase of the population densities and invasive spread during the 20th century (insufficent number of natural enemies).

13. Biocontrol
Jakub Horák
History
The origin of invasible populations of the Great Spruce Bark Beetle is not well known, possibly from Siberia.
Increase of the population densities and invasive spread during the 20th century (insufficent number of natural enemies).
Predation by root-eating beetle (Rhizophagus grandis) was observed already at the beginning of the 20th century in Germany.

14. Root-eating beetle (Rhizophagus grandis)
Biocontrol
Jakub Horák
Root-eating beetle (Rhizophagus grandis)
Natural and most probably specific predator of the Great Spruce Bark Beetle (of all development stages).
ephytia.inra.fr

15. Root-eating beetle (Rhizophagus grandis)
Biocontrol
Jakub Horák
Root-eating beetle (Rhizophagus grandis)
Natural and most probably specific predator of the Great Spruce Bark Beetle (of all development stages).
Quite big root-eating beetle (4,5-5,5 mm).

16. Root-eating beetle (Rhizophagus grandis)
Biocontrol
Jakub Horák
Root-eating beetle (Rhizophagus grandis)
Natural and most probably specific predator of the Great Spruce Bark Beetle (of all development stages).
Quite big root-eating beetle (4,5-5,5 mm).
One generation per year.

17. Root-eating beetle (Rhizophagus grandis)
Biocontrol
Jakub Horák
Root-eating beetle (Rhizophagus grandis)
Natural and most probably specific predator of the Great Spruce Bark Beetle (of all development stages).
Quite big root-eating beetle (4,5-5,5 mm).
One generation per year.
Able to read chemical communication of its of prey (larvae and adults).

18. Root-eating beetle (Rhizophagus grandis)
Biocontrol
Jakub Horák
Root-eating beetle (Rhizophagus grandis)
Natural and most probably specific predator of the Great Spruce Bark Beetle (of all development stages).
Quite big root-eating beetle (4,5-5,5 mm).
One generation per year.
Able to read chemical communication of its of prey (larvae and adults).
Predation is not as effective as for check-red beetles (ca 1-2 individuals per life), but is highly efficient in total.
oropas.free.fr

19. The use of biocontrol in the past
Jakub Horák
The use of biocontrol in the past
For the first time in Georgia, in 1963.

20. The use of biocontrol in the past
Jakub Horák
The use of biocontrol in the past
For the first time in Georgia, in 1963.
The use of beetles from Czechoslovakia.

21. The use of biocontrol in the past
Jakub Horák
The use of biocontrol in the past
For the first time in Georgia, in 1963.
The use of beetles from Czechoslovakia.
Root-eating beetles were reared in logs artificially collonized by the Great Spruce Bark Beetle.

22. The use of biocontrol in the past
Jakub Horák
The use of biocontrol in the past
For the first time in Georgia, in 1963.
The use of beetles from Czechoslovakia.
Root-eating beetles were reared in logs artificially collonized by the Great Spruce Bark Beetle.
Till 70s approximatelly tens of thousands of beetles was emerged.

23. The use of biocontrol in the past
Jakub Horák
The use of biocontrol in the past
For the first time in Georgia, in 1963.
The use of beetles from Czechoslovakia.
Root-eating beetles were reared in logs artificially collonized by the Great Spruce Bark Beetle.
Till 70s approximatelly tens of thousands of beetles was emerged.
Biocotrol was used in 70s in Turkey.

24. The use of biocontrol in the past
Jakub Horák
The use of biocontrol in the past
Problems also started in France and Belgium in 80s.

25. The use of biocontrol in the past
Jakub Horák
The use of biocontrol in the past
Problems also started in France and Belgium in 80s.
Use of artficial feeding and chemical stimulation of oviposition.

26. The use of biocontrol in the past
Jakub Horák
The use of biocontrol in the past
Problems also started in France and Belgium in 80s.
Use of artficial feeding and chemical stimulation of oviposition.
Till the end of 90s, there was 0.5 mil. individuals emerged (♂:♀ = 1:1).

27. The use of biocontrol in the past
Jakub Horák
The use of biocontrol in the past
Problems also started in France and Belgium in 80s.
Use of artficial feeding and chemical stimulation of oviposition.
Till the end of 90s, there was 0.5 mil. individuals emerged (♂:♀ = 1:1).
The same biocontrol strated also in Great Britain in 80s.
data.nbn.org.uk

28. The use of biocontrol in the past
Jakub Horák
The use of biocontrol in the past
Problems also started in France and Belgium in 80s.
Use of artficial feeding and chemical stimulation of oviposition.
Till the end of 90s, there was 0.5 mil. individuals emerged (♂:♀ = 1:1).
The same biocontrol strated also in Great Britain in 80s.
During 6-8 years situation was stabilized regarding the populatin densities of the Great Srpuce Bark Beetle.

29. Biocontrol
Jakub Horák
Present time
Problems mainly in France and the Great Britain (exotic spruce plantations).
design-site.net

30. Biocontrol
Jakub Horák
Present time
Problems mainly in France and the Great Britain (exotic spruce plantations).
Succesfull use of kairomones (i.e. chemical communication among species).
commons.wikimedia.org

31. Predator was introduced to the China.
Biocontrol
Jakub Horák
Present time
Problems mainly in France and the Great Britain (exotic spruce plantations).
Succesfull use of kairomones (i.e. chemical communication among species).
Predator was introduced to the China.

32. It is a specific case of the use of natural enemies against the pest.
Biocontrol
Jakub Horák
Conclusions
It is a specific case of the use of natural enemies against the pest.

33. It is a specific case of the use of natural enemies against the pest.
Biocontrol
Jakub Horák
Conclusions
It is a specific case of the use of natural enemies against the pest.
Biocontrol using this root-eating beetle is highly efficient in many places of present occurrence of the Great Spruce Bark Beetle.

34. Thank you for your attention
Biocontrol
Jakub Horák
Thank you for your attention