Abstract

RECENT investigations1 have shown that when ‘queen substance’ (9-oxodec-trans-2-enoic acid) is distributed throughout the colony of honey bees, it partially inhibits the development of ovaries in workers and influences their behaviour by inhibiting queen-cell construction. Similar effects of crude extracts of queen honey bees have been demonstrated on other groups of social insects, for example, Formica fusca L.2 and Kalotermes flavicollis F.3 This non-specificity for orders of social insects suggests that ‘queen substance’ might have similar inhibitory effects on ovary development even of non-social insects. This hypothesis was tested by examining the effect of synthetic ‘queen substance’ on ovary development in the house-fly, Musca domestica L.

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