A trap for catching ground crawling insects. Usually it is made out of a cuplike container buried in the ground into which insects fall. The beaker contains a liquid (water with soap; alcohol) or glue to prevent escape.
PITFALL TRAP
Meaning of PITFALL TRAP in English
English glossary of entomology and crop protection. Английский глоссарий энтомологии и защиты растений. 2012