Are sycamore trees prone to diseases? 4 Problems of Sycamore.

Have you heard of the problems with the sycamore? If you are considering getting one, you should know some of the problems with sycamore. However, before shopping for a gardener, you want to know if the sycamore tree is prone to diseases and what that might mean. So, don’t stop reading to learn more.


What are the symptoms of BLS in sycamore trees?

Bacterial Leaf Scorch (BLS) symptoms in sycamore trees include:

  • The bark on the tree’s trunk will dry out and become very thin.
  • Trees become stunted and have poor growth rates.
  • The bark may begin to break at the tree’s base in large patches with irregularly shaped cracks, or it may just peel off in thin sheets.
  • Its stems and leaves become brittle and break off easily when touched.
  • The leaves on the tree will turn yellow, brown, or black and drop from their branches. In some cases, the leaves may be spongy and look like they are rotting from within.
  • It dies suddenly without any visible injury to the tree.
  • The leaves on the branches of a sycamore tree can also turn yellow or brown. But this is usually due to disease rather than BLS.

What are the causes of BLS in sycamore trees?

Bacterial leaf scorch (BLS) is a disease that attacks the leaves of many tree species. It occurs when a soil-borne pathogen, usually a bacterium called Xanthomonas, infects and kills off the photosynthetic tissue on the surface of leaves. The leaves then turn brown, dry, and die.

BLS comes from bacteria in healthy soils but becomes over-colonized when the tree becomes stressed (e.g., drought or nutrient deficiency). The disease occurs naturally in many different plant species like crops such as citrus fruits, grapes, and olives; ornamentals such as roses; and native plants such as sycamore trees.

What are the causes of Anthracnose in sycamore trees?

Anthracnose is a fungal disease that affects sycamore trees. There are many causes of anthracnose, and many of them might kill your tree. They are one of the problems of sycamore.

Below are three causes of anthracnose:

  • The most common cause of anthracnose is lack of water, especially during dry spells. It can lead to plant stress, and thus the fungus thrives.
  • Another common cause is internal damage caused by insects or animals grazing on the leaves of a sycamore tree. It can allow the fungus to enter through tiny openings in the leaves.
  • The third cause is weather conditions such as high temperatures or flooding. If these conditions occur for long periods, they can weaken trees, making them more susceptible to infection by fungus spores.

What are diseases associated with sycamore trees?

Many diseases affect sycamore trees. Some of the most common ones include:

  • Anthracnose
  • Cankerworm
  • Crown gall
  • Downy mildew


An afflicted tree’s leaves, twigs, and buds are all affected by this fungus disease. It can cause black spots on the leaves, which turn brown and drop off.


These tiny caterpillars feed on the bark of a tree and leave behind a white, powdery mass when they mature.

Crown gall

These gall-like growths form on tree branches and trunks. They come from a bacterium found in soil, water, or air that enters through wounds in the tree trunk or branch tips.

Downy mildew

It also goes as “foxglove,” this fungal disease causes dead patches on leaves that eventually turn brown and fall off.

Are sycamore trees prone to diseases?

Sycamore trees are vulnerable to pests and diseases, but a fungal infection is the most frequent issue. They are prone to fungal diseases such as powdery mildew and powdery scab, which can form on the undersides of leaves.1

Insects bother the sycamore tree. Examples are aphids and scale insects. These insects can cause damage to leaves and stems, resulting in brown spots on leaves and twigs.

Symptoms of fungal diseases include:

  • A soft or discolored or yellowing of leaves.
  • Brown spots on leaves.
  • Twig dieback
  • Leaf loss
  • Stunted growth
  • Yellowing of fruit.

If you notice these symptoms on your sycamore tree, consult your local extension office for information about how to treat it.

Learn how to avoid problems with your sycamore tree.

What is wrong with my sycamore tree?

One of the most common problems is root rot, caused by poor drainage or soil compaction. If your sycamore roots are not fully developed, they will not be able to take up water from the soil, causing it to rot. It can also happen if the tree planted is too deep. They won’t be able to effectively absorb water from below if the roots are not permitted to grow deep enough into the soil.

Root rot comes from other pests or diseases. These include borers and mealybugs, which feed on a tree’s roots and produce honeydew on leaves. The honeydew attracts ants, who infect the tree with fungal spores that cause root rot.

Another common problem with sycamores is canker disease, which affects branches weakened by dry weather conditions or animal damage (such as rabbits). At the site of the attack, it makes the branches appear unhealthy and finally kills them.

What are sycamore trees pests?

Sycamore trees are very susceptible to pests. They include:

  • Aphids
  • Scale insects
  • Bark beetles


These are insects with green or brown bodies. They suck the sap from the tree’s leaves and buds. A large population of aphids causes reduced growth and loss of leaves. Scale insects are tiny insects that cover the branches with a white powdery substance called scale. It also reduces photosynthesis which means less food for your plant.

Bark beetles

These insects drill holes into trees during summer to lay their eggs inside them. These larvae feed on wood inside the tree, causing it to weaken over time, eventually killing it if left unchecked long enough.

Other pests include caterpillars, slugs, and snails which feed on plant parts such as flowers or fruit. Spiders spin webs around the tree and can damage shoots and stems. Rodents gnaw on bark at night while you’re sleeping.

Are sycamore trees prone to pest infestation?

Yes, sycamore trees are prone to pest infestation.

The most important thing you can do to prevent this is to keep your sycamore tree well watered, as they need plenty of water to thrive. You should also avoid any chemicals that could damage the bark or leaves of your tree, as these could cause fungal diseases to spread throughout your entire garden.

How do I prevent BLS in sycamore trees?

There are many ways to prevent the BLS in sycamore trees.

  • The first thing you should do is to make sure that your tree is healthy. Start by checking for disease, insects, wind, and water damage. If there are any problems, you need to treat them immediately.
  • You can also apply a fungicide to the branches of your sycamore tree. You should only use products from reputable companies such as Bayer or Monsanto. These products will help prevent BLS from happening again in the future.
  • The best way to prevent BLS in sycamore trees is by keeping them watered throughout the year. You should also ensure your soil has plenty of nutrients to help it grow healthy roots and leaves.

How do I prevent powdery mildew fungus in sycamore trees?

Preventing powdery mildew fungus requires taking steps to keep your sycamore trees healthy and well-watered throughout the year.

Here are some tips to prevent powdery mildew fungus in sycamore trees:

  • Regularly prune back overgrown branches and snip off any dead or diseased leaves. It will help keep your sycamore tree healthy by removing dead wood and allowing sunlight to reach living leaves.
  • Remove wet leaves around the base of each branch as they decay because they provide ideal conditions for powdery mildew fungus to thrive.
  • Water your sycamore trees regularly but do not allow them to become overly moist because this encourages powdery mildew fungus growth on their foliage.

Learn how to control pomegranate root pests.

Citations Used in this Article

  1. Common Problems With Sycamore Trees: Learn About Sycamore Tree Pests And Disease (