Botrytis

Plant diseases caused by Botryotinia species appear primarily as blossom blights and fruit rots but also as leaf spots and bulb rots in the field and in stored products. Also known as chocolate spot especially when affecting leaves and damping off in seedlings.

Identifying Features
Grey mould usually starts on a damaged area of stem. Other parts of the plant may then be infected - diseased flower stalks cause fruit drop.

Treatment
Cut out diseased areas and remove all rotting parts.

Prevention
Reduce humidity by adequate ventilation and avoid overcrowding. Remove decaying leaves and fruit. No systemic sprays are available.