Black sooty moulds are appearing on Brussel Sprouts.
Brussels-sprout-row
The black sooty mould can be sticky and is the result of a whitefly attack. Cabbage whitefly overwinters on brussel sprouts as adult insects. Adult whitefly and their nymphs suck sap from the sprout plant and excrete a sugary substance (honeydew) onto the leaves.
Sooty moulds then grow on this sugary substance – and can make a real mess of the sprout buttons. The warmer the weather the worse the problem is. Click the link for more information on Cabbage whitefly which is the cause of black sooty moulds on brussel sprouts.
