Carabids Collected in a DDT-sprayed Peach Orchard in Ontario (Coleoptera: Carabidae)

Abstract

Abstract At least 25 species of Carabidae were caught in pitfall traps in a DDT-sprayed Ontario peach orchard, the commonest being Pterostichus melanarius (Ill.). Harpalus pennsylvanicus (Dej.), Agonoderus lecontei Chd., Amara ( Curtonotus ) pennsylvanica Hayw., Anadaptus sanctaecrucis (F.) and Anisodactylus rusticus Say. Fewer P . melanarius were caught in plots where foliar sprays of DDT were used most recently, but a rather large and varied population of carabids persisted in all plots despite the application of DDT for as long as ten years.