CorseMachin | Japanese Maple Problems - Pests And Diseases For Japanese Maple Trees

Japanese maple is susceptible to a number of leaf spot diseases that may disfigure leaves and cause early defoliation. The major foliar diseases are anthracnose, Phyllosticta leaf spot and Pseudomonas tip blight. There are several insects that may attack Japanese maples. Leaf feeders include the Japanese beetle.

What pest eats Japanese maple leaves?
How do I get rid of Japanese maple bugs?
What can I spray on my Japanese maple for bugs?
How do you treat Japanese maple fungus?
Can a Japanese maple take full sun?
What is the best fertilizer for Japanese maple trees?
How do you bring a Japanese maple back to life?
Why are branches dying on my Japanese maple?
How do you revive a Japanese maple tree?
Can you overwater a Japanese maple?
When should I fertilize my Japanese maple tree?
Why are Japanese maple trees so expensive?

What pest eats Japanese maple leaves?

The most common Japanese Maple pests are the Japanese beetles. These leaf feeders can destroy the looks of a tree in a matter of weeks. Other Japanese maple pests are scale, mealybug, and mites. While these Japanese maple pests can attack a tree of any age, they are usually found in young trees.

How do I get rid of Japanese maple bugs?

You can use insecticidal soap, neem oil or narrow-range oil in a spray solution to kill aphids. Spray the solution, with a high volume of water, over both sides of your Japanese maple's leaves. Pay particular attention to covering the undersides of the leaves with insecticide.

What can I spray on my Japanese maple for bugs?

Pest control is all about observation. If you can get in early before the aphid population explodes, the pest can be controlled easily with a contact killer like pyrethrum. Spray over the top of the leaves as well as their underside. You'll need a few applications over a number of weeks to eradicate them.

How do you treat Japanese maple fungus?

Applying compost and organic matter around the base of your trees on a yearly basis is a great way to start. A certified tree specialist can also figure out the exact fungus causing root rot in your tree. They can then use fungicides to treat and kill the root rot.

Can a Japanese maple take full sun?

While some can tolerate full sun, most Japanese maple varieties prefer dappled or afternoon shade, especially when young. Shade does have its limits though–they need some sun for best foliage color and to promote the more loose and open structure for which they are prized. Protection from strong winds.

What is the best fertilizer for Japanese maple trees?

I recommend using a slow or controlled release type fertilizer. Commercially known as Polyon or Osmocote, these are the most common and both work very well on Japanese maples. We use both successfully in our Japanese maple production.

How do you bring a Japanese maple back to life?

Keep your Japanese maple healthy to avoid dieback of limbs and potential tree death. A deep watering is necessary every one to two weeks in dry weather. If the roots are allowed to dry out the tree will die. Prune out dead or diseased branches when you see them to limit exposure to the healthy parts of the tree.

Why are branches dying on my Japanese maple?

Japanese maples hate “wet feet,” so a combination of poor drainage and rain like we had in May can encourage a soil-borne fungal disease called phytophthora. This disease can kill trees branch by branch.

How do you revive a Japanese maple tree?

The soil around a Japanese maple tree should remain cool and moist, but not wet.

Cut back the diseased and dying limbs to live wood, a main branch or the trunk of the tree.
Do not pile excess soil over the root base of the tree because the roots should remain naturally close to the soil surface.

Can you overwater a Japanese maple?

Young plants are very prone to root rot and mildew due to excessive water. As long as the soil allows good drainage and is well aerated, overwatering Maples is usually not a concern.

When should I fertilize my Japanese maple tree?

When to Fertilize Japanese Maples

Once you plant the trees, wait at least until their second growing season before fertilizing Japanese maples. You'll want to give the plants ample time to adapt to their new conditions. When you do start feeding Japanese maples, do so in late winter while the ground is still frozen.

Why are Japanese maple trees so expensive?

Originally Answered: Why are Japanese maples significantly more expensive than other types of trees? The biggest factor is that most of them are grown as grafted plants. This adds significant cost to each one as seedlings are much cheaper to produce. That and yes they are slow growing.