Abstract
The availability of pollen for fertilization of Moss' Early cherries and its dispersal by wind and by honeybees was studied in the laboratory and in a cherry orchard. Ripening and dehiscence of anthers was promoted by higher temperatures and lower relative humidities. Airborne pollen concentrations in the orchard were greater between 10.00 a.m. and 4.00 p.m. than during the remainder of the day. Flight activity of bees was related to ambient temperatures and bee visits to cherry flowers were comparable with those for apples. Enclosing trees in beeproof cages caused a marked decline in fruit yields.
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