Magnolia bacterial blight11/9/2023 ![]() (See Figure 1a-f for a pictorial representation of the symptoms.)Īnthracnose-Irregular dead areas on leaf margins, between and across and/or along veins, often Leaf diseases of deciduous hardwood trees are grouped into six categories, to simplify Here pecan leaf disease control is discussed in Extension Fact Sheet EPP‑7642, “Pecanĭiseases: Prevention and Control.” Diseases of fruit trees are covered by severalĮxtension Fact Sheets and Current Reports. The pecan tree is sometimes used as a shade tree, its leaf diseases are not covered Pine.” Powdery mildew diseases of shade trees are covered in Extension Fact SheetĮPP‑7617, “Powdery Mildews of Ornamentals and Fruit, Shade, and Nut Trees.” Though “Diplodia Tip Blight and Canker of Pine” and EPP-7331 “Dothistroma Needle Blight of (junipers, pines, etc.) are covered in several other factsheets including EPP-7330 Leaf spot and blight diseases of coniferous trees Was produced to describe the symptoms and control of leaf diseases of deciduous hardwood Need information on how to prevent or otherwise control leaf diseases. Home gardeners are justifiably concerned when foliage of their yard trees become diseased,Įspecially when these diseases cause defoliation, twig and limb death, and perhapsĭeath of a tree that has been defoliated several years in a row. Common Leaf Diseases of Deciduous Trees 2.Check with your Cooperative Extension Service for pest controls. Remove weeds from the bed and remove debris from the bed after frost. Burpee Recommends: Many thrips may be repelled by sheets of aluminum foil spread between rows of plants. Thrips can spread many diseases from plant to plant. The plant will have a stippling, discolored flecking or silvering of the leaf surface. They suck the juices of plants and attack flower petals, leaves and stems. Thrips: Thrips are tiny needle-thin insects that are black or straw colored. For a severe infestation contact your local County Extension Service for recommendation for your area. Completely spray the stems with insecticidal soap. Burpee Recommends: Natural predators often keep populations in check. Scale can weaken the plant, causing it to grow very slowly. Scale may produce honeydew, so leaves and stems may be sticky. Scale may not have any apparent legs and may not move. Scale: Small bugs look like brown or tan bumps on the stems of plants. Consult your Cooperative Extension Service for other insecticide recommendations. Leafhoppers: Leafhoppers cause injury to leaves and stunt growth. You can also wash them off with a strong spray, or use an insecticidal soap. Burpee Recommends: Introduce or attract natural predators into your garden such as lady beetles and wasps which feed on aphids. They leave a sticky residue on foliage that attracts ants. Common Pest and Cultural ProblemsĪphids: Greenish, red, black or peach colored sucking insects can spread disease as they feed on the undersides of leaves. Contact your Cooperative Extension Service for fungicide recommendations. Burpee Recommends: Avoid powdery mildew by providing good air circulation for the plants by good spacing and pruning. The leaves appear to have a whitish or greyish surface and may curl. ![]() Powdery Mildew: This fungus disease occurs on the top of the leaves in humid weather conditions. Burpee Recommends: Keep plants healthy and vigorous, and avoid damaging bark. Sunken, discolored bark near wounds or at the base of branches are followed by reddish orange fruiting bodies and callus tissue. It most often occurs in spring and fall on stressed trees. Nectria Canker and Dieback: This fungus causes cankers and dieback of branches and twigs. Make sure plants have good air circulation. Burpee Recommends: Remove affected plant parts, avoid watering at night and getting water on the plant when watering. It thrives in cool wet weather conditions. Burpee Recommends: Prune only in dry conditions do not water overhe make sure plants are spaced such that they have good air circulation.īotrytis: This fungus causes a grey mold on flowers, leaves, stems and buds. Some lesions may appear on twigs and may ooze in wet weather. Use a mulch to prevent spores from splashing from the soil onto plants.īacterial Blight: This may occur mostly on the foliage causing small black spots or large brown spots. Keep a clean garden, remove and discard all diseased plant material. Burpee Recommends: Avoid overhead watering which can spread the fungus spores. The fungus overwinters in diseased plant debris. The spots turn black in the center leaves become yellow, dry and fall off. Anthracnose: This is a fungus disease that causes brown spots with purple edges on the leaves. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |