A white powdery fungal growth on the surface of leaves, buds, petals and shoots of roses and many other plants. The foliage may become discoloured, heavily infected young leaves may be curled and distorted, and the plant’s vigour may be reduced. powdery mildew ( Podosphaera fuliginea) and grey mould ( Botrytis cinerea). Prompt removal of infected leaves early in the season may delay the build-up of the disease slightly, although weather conditions havethe greatest influence over the speed of spread. Dispose of plants at the end of the season. We independently research, review, and recommend the best products. If you buy something through our links, we may earn a commission. Learn more. If you’re like me, you’ve probably scoured...

We independently research, review, and recommend the best products. If you buy something through our links, we may earn a commission. Learn more.The olive scab fungus Venturia oleaginea is closely related to the fungi that cause scab diseases on other plants such as apples, pears, pyracantha and Sorbus. The disease is widespread in the Mediterranean and is found in most countries where olives are grown. We independently research, review, and recommend the best products. If you buy something through our links, we may earn a commission. Learn more. Power and precision too often come at...

Distorted leaves are often the first sign of infection, especially with the larger-leaved cultivars. A grey/mauve felt-like 'fungal' growth appears on the under-surface of the leaves, with diffuse purple-red or yellow patches developing on the corresponding upper surface. The spores of the fungus are spread by rain-splash, and warm, wet conditions are ideal for infection. In the Mediterranean such conditions occur in autumn and winter, but in the UK temperatures during spring and summer are more suitable.These products will also give incidental control of powdery mildew, another foliar disease that can affect antirrhinums. The fungicide tebuconazole with trifloxystrobin (Provanto Fungus Fighter Plus, Toprose Fungus Control & Protect) has a recommendation for the control of leaf spots on ornamental plants. Additionally, the fungicides tebuconazole (Provanto Fungus Fighter Concentrate) and triticonazole (Fungus Clear Ultra) are labelled for the control of other diseases on ornamental plants, and could therefore be used legally on Cornus(at the owner’s risk) to try and control anthracnose. We independently research, review, and recommend the best products. If you buy something through our links, we may earn a commission. Learn more. Spring is finally here – and that...