| Diseases: Flower bud drop |  |
Abnormalities of non parsitaire or unknown cause
Flower bud drop (also known as flower bud abscission) can occur from the time that the flower buds have reached a length of 1 to 2 cm. Previous to abscission, the buds turn light green. At the same time, the flower stem becomes constricted at the base of the bud. The bud then falls off. During the spring, the lowest buds are the first to drop; in the autumn, the higher buds will drop first. Flower bud desiccation can occur during any stage of development. If it occurs early, the plants will remain short and the leaves will be dull green, short and narrow and arranged closely next to the stem but will display no symptoms of leaf scorch. Some or all the flower buds will desiccate during an early stage of growth and will later appear in the axils of the top leaves as small white specks. If flower bud drop occurs later in the plant’s development, the plants usually develop normally with a normal root system and with flower buds that are already clearly visible. Later, however, the buds will turn light green and shrivel. Flower buds that have already begun to display their flower colour will turn paler and dry up completely but will usually not fall off. The upper buds in the inflorescence will be the first to desiccate.
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