Approximately
500 adults of T. evanescens were released 10e30 cm away from the egg cards. The control boxes contained
no parasitoids; there were five replicates for all treatments and controls. Two experimental
conditions were tested, i) placing a single T. evanescens-release unit with sentinel egg cards placed every
3e4 days without any further replacement of the release unit for three weeks, ii) both new host eggs and
T. evanescens release units were replaced every 3e4 days. Mean emergence of C. cephalonica was
significantly (p > 0.001) suppressed by the release of T. evanescens.