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- Alternaria Leaf Spot. Fungi in the Alternaria genus cause dark brown to black spots on the foliage. These spots may or may not have yellow halos. If the leaves are heavily infected, they will drop from the tree.
- Anthracnose. Anthracnose occurs in hundreds of species, including varieties of Acer. Symptoms can range from a few angular spots to complete defoliation.
- Bacterial Leaf Spot. If you grow fruit trees, lilacs, forsythia, or dogwoods, you might already be familiar with this disease. It’s a bacterial infection that enters through wounds on the plant, whether caused by insects, pruning, or wind damage, and it causes small black spots to appear on the leaves.
- Phyllosticta. This disease appears as round yellow or tan spots on the leaves. On other Acer species, the spots might also have a purple border. If you look closely, the centers might be so thin as to be transparent, and these might fall out, leaving small holes throughout the foliage.
May 8, 2024 · Zones 5-8. These trees thrive in any well-drained, consistently moist soil—except highly alkaline soil. Before planting, work some compost into the soil around the tree to give it plenty of nutrients, and add compost occasionally during spring and early summer. Japanese maples are heavy feeders, especially when young.
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What does a Japanese maple look like?
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Are Japanese maple trees monoecious?
- Leaf Identification
- Twig and Bud Identification
- Fruit Identification
- Flower Identification
The leaves of the Japanese Maple are typically 2″ to 5″ long and can range in color from green to deep red to purple. The leaf shape is star-shaped, and the venation is palmate. The margins are serrated and has 5 to 7 deep, palmate lobes. It has an opposite arrangement.
The twigs of the Japanese Maple are smooth (glabrous) and very slender. They can be green or red. The buds are conical, and the base of the buds are usually covered by a tan, fuzzy fringe.
The fruit of the Japanese Maple is a 3/4″ to 1″ long double samara (winged papery seed coat). It has divergent (90 degrees) wings and has a red-brown color. The samaras ripen in fall.
The Japanese Maple is monoecious. It is not showy, but they are small, red to purple hanging clusters. The flowers bloom in mid-spring.
Apr 13, 2024 · Discover the stunning diversity of Japanese maple trees with our guide to 16 different types. Learn about their unique identifying features, from leaf color and shape to growth habits, perfect for enhancing your garden's beauty.
Japanese maple trees can be identified by their distinctive leaf characteristics, bark and trunk features, overall shape and size, as well as their flowers, seeds, and environmental preferences. Their leaves are typically palmate with 5-7 lobes, and their bark is generally smooth and gray.
Mar 18, 2024 · By following the characteristics of the leaf, you can quickly identify if you are looking at a japanese red maple leaf or not. The shape, color, size, and texture of the leaf are unique features of the japanese red maple tree, the details of which are usefully outlined in this beginner’s guide.
Apr 3, 2024 · For a Japanese maple currently carrying cankers, prune away infected branches several inches behind the symptomatic tissue. Be sure to dispose of them promptly, and only make your cuts in dry weather with sharp, sterile blades. To address cankers on the trunk, you should consult an arborist or plant pathologist. 3.
