Abstract
The screwworm, Cochliomyia americana C. & P., is one of the most destructive pests of livestock in this country. In nature the larvae live as obligatory parasites on warm-blooded animals, having never been found to complete their growth normally on cold-blooded animals or on carcasses or other non-living media. The earlier work on the biology and methods of control was considerably handicapped by the time-consuming and expensive procedure of rearing the larvae on living animals. By a careful study of their nutritional and temperature requirements it has been possible to develop a method of rearing the larvae on artificial media (Melvin & Bushland 1936) and this has been of distinct importance in furthering research work on larvicides and on many other aspects of the screwworm problem. Since the discovery that these larvae could be reared on artificial media, further studies have been made on their nutritional requirements. The results of these studies, together with notes on incidental observations, are presented herein.
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