Frontalin in the male mountain pine beetle.
1Departments of Entomology, Oregon Slate University, 97331, Corvallis, Oregon.
Journal of Chemical Ecology
|January 14, 2014
Summary
Male mountain pine beetles (MPB) produce frontalin, a pheromone that reduces their aggregation in host trees. This finding is crucial for understanding MPB communication and developing control strategies.
Area of Science:
- Entomology
- Chemical Ecology
- Forestry
Background:
- Mountain pine beetle (MPB) is a significant pest of lodgepole and ponderosa pine.
- Pheromones play a critical role in MPB aggregation and host colonization.
Purpose of the Study:
- To identify airborne semiochemicals produced by male MPB.
- To investigate the role of frontalin in MPB aggregation behavior.
Main Methods:
- Gas chromatography-mass spectrometry (GC-MS) was used to identify airborne compounds.
- Olfactory walkway experiments assessed male beetle responses to semiochemicals.
- Field trapping evaluated the effect of frontalin on MPB aggregation.
Main Results:
- Frontalin and exo-brevicomin were identified in the air around fed male MPB.
- Unfed males released exo- and endo-brevicomin, but not frontalin.
- Racemic frontalin reduced male arrestment behavior and attractant chirp production.
- Frontalin significantly inhibited MPB aggregation in field traps.
Conclusions:
- Male MPB produce frontalin, which acts as an anti-aggregation pheromone.
- Frontalin's role in natural MPB populations requires further investigation.
- Understanding frontalin's function can aid in developing novel MPB management strategies.
