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Alfalfa Flower Aroma and Flower Selection by Honey Bees¹

Honey bee (Apis mellifera L.) selection among flowers from seven clonal lines of alfalfa (Medicago sativa L.) presented in bouquets for three consecutive days was consistent from day to day and similar to results reported at a different locality. Flower aroma differences were noted as a possible basis for this selection. A gas chromatographic technique is described for collecting and separating components of flower aroma from intact plants. The flower aromas of three alfalfa clones were shown to differ greatly in their volatile components.

Key Words: Alfalfa flower aroma • Honey bee visitation • Capillary gas chromatography

² Research Plant Physiologist, Crops Research Division and Research Entomologist, Entomology Research Division, Bee Research Laboratory, Tucson, Arizona 85719.

Received for publication June 21, 1969.

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