Production of the green lacewing Chrysoperla caranea (Steph.) (Neuropt., Chrysopidae) reared on semi-artificial diet based on the algae, Chlorella vulgaris

The larvae of the aphid lion Chrysoperla carnea (Steph.) were reared on a s emi-artificial diet for laboratory rearing. Algae, Chlorella vulgaris Beij was used as a source of protein for the nutrition of the predator. Feeding the newly hatched larvae of the predator on water extract of the algae by u sing a small piece of sponge, extended the larval duration up to 30 days, a nd the larvae failed to pupate. The addition of carbohydrates, salts and vi tamins was necessary to the larvae to complete their development to reach t he pupal and adult stages. Normal adult longevity and egg deposition were o btained after the addition of the carbohydrates, salts and vitamins.