Abstract
The effect of several environmental factors on flower bud atrophy in ‘Baccara’ roses was studied. Reduction of air or soil temperature caused an increase in flower bud atrophy. Reduction in light intensity increased “blindness” in relation to shading intensity. Shading of only the young developing shoot also greatly increased flower atrophy. Continuous shading had a cumulative effect in increasing “blindness”. However, removal of shade caused an immediate increase in flowering to a rate comparable to unshaded control. Photoperiod had no effect.
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