Published online by Cambridge University Press: 31 May 2012
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.