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Hark Orchideen - Competence in Orchids  
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Your position: Information on crop protection > Overview > Botrytis > Biology  « backprint
Biology Damage Control Pictures
Grey mould, blossom rot, Botrytis rot
The causative organism of leaf and stem mould and marked blossom rot on Phalaenopsis and Cattleya is the weed mould Botrytis cinerea Pers. This common intruder has a very broad spectrum of host plants; in fact it grows nearly on all parts of the plant. A characteristic feature is the grey sporal area on the infested spots (grey mould) which can be seen in high humidity. When slightly touched or due to air movement, the spores detach from their carriers and spread in the greenhouse. In favourable conditions Botrytis can also form dark sclerotical diseases.
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