Abstract

SummaryColonies of newly emerged bees which had never eaten pollen were offered diets consisting of (A) vitamin-free casein and minerals, or A supplemented with cholesterol and the vitamins of the B group (B), or with the B vitamins but without cholesterol (C), or with cholesterol and the vitamins except pantothenic acid (D), or with cholesterol and the B vitamins except pyridoxine (E), or with cholesterol and the B vitamins except thiamine (F). The colonies reared 5 cycles of brood on diets B, D and F, and 3 cycles on diet C. No adults were produced on diet E, and no larvae were reared to the sealing stage on diet A. It therefore appears that pyridoxine is required for normal brood rearing.

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