Beetle larvae displaying droplets of
- Larvae of many leaf beetle
species possess secretion glands.
- They display droplets of a
repellent smelling secretion when disturbed by
- Some beetles
vitellinae) use host
plant salicylates to produce their
- This secretion consists
mostly of the bitter-smelling, volatile
- Salicylates may be found in
the bark or leaves of willows.
- The salicylate chemistry of
willows tends to be species specific.
- Many willow species contain
little or no salicylates.
Salicylate contents of Finnish willows
Leaf chemistry of three Finnish willows: Salix
myrsinifolia, S. pentandra, and S.
- We investigated the
salicylate chemistry of three species of Finnish
amounts of salicylates.
- Salix phylificolia
Beetle secretion on the same three Finnish willows.
- Beetle larvae produce little
secretion when feeding on the salicylate-poor
- They produce the most
secretion when feeding on the species that
contains the most salicylates, Salix pentandra.