Fungus disarms bark beetle chemical shields by converting their plant-derived toxins

Spruce bark is rich in phenolic compounds that protect trees from pathogenic fungi. A research team at the Max Planck Institute for Chemical Ecology in Jena has investigated how these plant defenses function within the food web, particularly in spruce bark beetles (Ips typographus), which ingest the compounds through their diet. Could the beetles use substances from the spruce's defenses to protect themselves against pathogenic fungi?