Diseases
& pests

Grey-brown fuzzy mould on fruits, leaves and stems. Progresses in cool humid weather.

Orange-brown pustules on the underside of leaves. Weakens plants and reduces yield by 20–40%.

One of the most dangerous pathogens. Destroys tomatoes and potatoes in warm humid conditions within a week.

Dark spots with irregular margins on rose leaves. Causes premature leaf drop and bush exhaustion.

Sudden wilting of blossoms and shoots that look "scorched". Spreads from a single branch to the whole tree.

Soft wet rot of roots and bulbs with a sharp unpleasant odour. Spreads in waterlogged soils.

Bark ulcers with gum exudate. Weakens the tree and may kill individual branches.

Mosaic discolouration of leaves — light and dark green patches. Fruit distortion and yield loss.

Stiff upward rolling of upper leaves into a tube shape. Spread by aphids, no treatment available.