Sweet and sour cherry variety traits influencing bee pollination.
1990
Benedek, P. | Nyeki, I. | Szabo, Z. (Noveny- es Talajved. Szolg., (Hungary))
The size of sweet and sour cherry flowers, the number of anthers, and the relative positions of the pistils and stamina are greatly influenced by the weather. With the exception of the Pandy type, the flowers of sour cherry are usually smaller than those of sweet cherry. The filaments are generally erect in sweet cherry and prostrate in sour cherry. From the point of view of bees collecting pollen and nectar, the most important factor is the pollen and nectar production of the flowers, or varieties, which extremely depends on the weather. The sweet cherry varieties included in the examinations (Bigarreau Reverchon, Germesdorfer Riese, Victor, Sam, Tardif de Vignola, Chinook, Lambert) were completely self-sterile, with either low (less than 20 o/o), medium (20-30 o/o) or high (30-40 o/o) seed setting when open pollinated. Sweet cherry has a plentiful pollen production, while the nectar production fluctuates, but is never really high. In sour cherry, too, the pollen is the chief attraction for bees. In wet weather there is an increase in the nectar content per flower and a reduction in the sugar content. This is especially significant in the self-sterile Pandy variety and in similar varieties. Self-fertile varieties also give much better seed setting if open pollination takes place with the help of bees.
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