Response of Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) to some potential attractants

Abstract In laboratory and field studies in southern England, the responses of adults of Chrysoperla carnea (Steph.) to various test materials were compared. Although the chrysopid, especially females, were especially attracted to hydrolysed and oxidised L- and D-tryptophan, they are unlikely to be attracted to crops by these compounds in Britain in sufficient numbers to control infesting aphids.