Artificial overwintering chambers for green lacewings: results of international trials and implications for pest control

Lacewing overwintering chambers placed correctly in the field may be coloni zed by large numbers of adult common green lacewings (Chrysoperla carnea). This paper reports field results collected over 2 years from chambers place d in a number of European locations. Considerable variation was found in th e success rates of the chambers from different areas and some suggestions a re made as to why this might be. An experiment was conducted to investigate the potential use of overwintered lacewings in pest control. This attempt was not successful and possible reasons why are discussed.