Apple scab is caused by the fungus Venturia inaequalis. It infects crabapples and apples (Malus spp.), mountain ash (Sorbus spp.), pear (Pyrus communis) and Cotoneaster (Cotoneaster spp.). Leaf spots are round, olive-green, and up to 1/2 inch …

Nov 29, 2022 · Apple scab is a serious disease of apples and crabapples that attacks both leaves and fruit. Learn how to identify, treat, and prevent it in this guide. Scabby spots on fruits and leaves are sunken and may have velvety spores in the center.

Sep 13, 2021 · Apple scab, a common apple tree disease. How To Identify Apple Scab. Apple scab causes black lesions on both the leaves and the fruit of the apple tree. If you notice odd, dark splotches on your tree, it may be infected with …

Sep 14, 2024 · Apple scab is a fungal disease caused by Venturia inaequalis. It affects apple trees, as well as some crabapple varieties, leading to unsightly lesions and potentially impacting fruit quality and tree health. The fungus thrives in cool, wet conditions and can spread rapidly if not managed properly.

Apple scab is one of the most common diseases on apple trees and other plants in the apple family. This disease pops up everywhere apple-family plants grow. Most often, apple scab will affect apples, hawthorns, and crabapple trees.

Feb 17, 2020 · Apple scab is caused by a fungus, Venturia inaequalis, and is a serious disease of apple and crabapple (genus Malus) trees that spreads quickly and easily. Generally, you’ll first notice it in early spring, when rains, wind, and cool temperatures spread the fungal spores.

Apple scab is the most consistently serious disease of apple and flowering crabapple in Kentucky. This disease also occurs on hawthorn and mountain ash; a similar disease affects pear and pyracantha (firethorn). The most noticeable losses on apple result from reduced fruit quality and from premature drop of infected fruit. Scab

Sep 6, 2024 · What causes spots on apple tree leaves, or lesions on fruits? Learn about apple scab disease and how to treat it and prevent it.

Apple scab is a fungal disease caused by the fungus Venturia inaequalis, which affects leaves, fruit and twigs. While most common in apple trees, both pear and hawthorn are also frequently infected by the fungus. Outbreaks will be most severe …

How to identify Apple scab and how to prevent / treat it. Step by step advice with pictures to help the amateur gardener deal with this fungal problem. Lifecycle explained.