Eucalyptus erythrocoris: a source of nectar and pollen for honey bees in IsraelA. Lupo and D. Eisikowitch
Department of Botany, The George S Wise of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
Abstract - Eucalyptus erythrocoris F Muell blooms between July and September in Israel, when sources of nectar and pollen are scarce. A survey of E erythrocoris was conducted and the characteristics and environmental requirements of the trees in different biotopes were recorded. The flower phenology was studied and amounts of nectar secreted and nectar sugar concentrations determined. During the 4 days of its bloom, a single flower secretes 4 ml of nectar, which contain nearly half a gram of sugar. There was a high correlation between the foraging behaviour of the honey bees and the stages of nectar secretion and pollen release. Thus, it was concluded that, in addition to its nectar contribution, this tree is an important source of pollen. For this reason, together with its beautiful flowers and its environmental requirements, E erythrocoris is recommended as an ornamental tree in Israel.
Key words: Eucalyptus erythrocoris / nectar secretion / nectar plant / pollen plant / Israel