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7 lis 2023 · Leaf spot attacks many plants, but can be controlled by prevention or growing non-susceptible plants. Learn how to identify leaf spot and treat it.
Leaf spot diseases are a collective term for a variety of fungal and bacterial infections that cause discolored lesions or spots on the leaves of affected plants. These spots can range in size, color, and shape and can compromise the plant’s health if severe.
Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]
Most leaf spot diseases are caused by fungi, but a few diseases are caused by bacteria or other pathogens. Many pathogens are somewhat host-specific and will only cause disease on trees in the same family. Almost all trees and shrubs are susceptible to one or more leaf spot diseases.
29 sie 2023 · Leaf spot disease is a common problem affecting trees’ older leaves like sycamore, maple, dogwood, oak, and some fruit trees. But aside from trees, it can also affect various flowering plants such as geranium, chrysanthemum, lily, and rose, among others.
17 lip 2024 · Leaf spots on plants often develop in cool and wet conditions, such as those in early spring. In this article, we will explore the different types of leaf spot and suggest some tips about how it can be treated. What Causes Leaf Spots? Fungi.
Although leaf spots can be caused by air pollutants, insects, bacteria et al., most are a result of infection by pathogenic fungi. Once into the leaf, the fungi continue to grow and leaf tissue is destroyed. Resulting spots vary in size from that of a pin head to spots that encompass the entire leaf.
