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Horse Chestnut Leaf Blotch – Guignardia Blotch

Resources: Tree Problems

Horse Chestnut Leaf Blotch, also referred to as Guignardia Leaf Blotch, is a common fungal disease throughout the DC Metro Area. While non-native, the Horse chestnut is widely planted in urban and suburban landscapes.

Like most fungal diseases, these pathogens thrive in wet conditions. The rainy year we have been having will most likely lead to not only more horse chestnut leaf blotch infections but also more severe infections.

Susceptible Trees: Like the name implies this fungus mostly targets Horse Chestnut Trees. However, Buckeye trees may also serve as hosts.


Horse Chestnut Leaf Blotch Symptoms:

From a distance, the infected tree will appear to be scorched but close up you will find:

  • Reddish-brown spots on leaves often surrounded by yellow halos
  • Brown leaves
  • Shriveled leaves

If the infection progresses enough you will also encounter early leaf drop in late summer weeks before the typical leaf drop in fall.

horse chestnut leaf blotch

guignardia blotch

horse chestnut leaf blotch 1


Need Help With Horse Chesnut Leaf Blotch/Guignardia Blotch?

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Or Call Us At 703-573-3029


Lifecycle:

Although you may not notice the symptoms of horse chestnut leaf blotch until late summer the infection begins in spring. After the tree blooms in spring infected trees will start to experience pale green lesions that turn orange-brown as they dry. These lesions will distort the trees leaves for the remainder of the growing season. Once winter comes the fungal spores will overwinter in dead leaf debris then become active again in the spring re-infecting the tree.


Leaf Blotch Treatments:

Unfortunately, once infected you will have to live with the unsightly leaf blotch until the leaves drop in fall. However, you can prevent your tree from becoming infected again in the spring.

  1. Rake. To reduce chances of reinfection next spring rake all leaves and twigs and remove them from the property.
  2. Prune. Proper pruning can improve air circulation throughout the tree’s canopy speeding up the drying of leaves.
  3. Fungal Control. A series of fungicide applications in the spring can protect your tree from this fungus.

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Google Reviews

Grey Burkhart
Grey Burkhart
March 29, 2022.
Verified
Very professional review of our requirements and an accurate estimate. Showed up on time and were finished quickly. Cleaned up all of the debris and sawdust. Great job all around.
Dennis Bruns
Dennis Bruns
March 8, 2022.
Verified
We have used RTEC Treecare for several years. They do excellent work. Their staff is extremely knowledgeable and take great care in explaining the various options available for your particular situation. I highly recommend them.
Annette Iannucci
Annette Iannucci
February 23, 2022.
Verified
We have been using RTEC for years and were very pleased with the recent tree maintenance work they did for us. As always, we got good advice from their arborist Ben,. The crew that did the work is highly skilled, and they did a great job trimming our trees. They worked safely and efficiently, in addition to leaving the yard clean after they finished the work.
Susan Crawford
Susan Crawford
January 26, 2022.
Verified
RTEC was at my house today to removed a large Magnolia that was badly damaged by the recent snow. They did a fantastic job at a very reasonable price. They arrived right on time, worked efficiently and quickly and cleaned up so well it was hard to tell anything have been disturbed. Over the past several years, I have used RTEC for all the services I checked above, and have always been very pleased with their service and professionalism. I also appreciate that they are not eager to take down trees that don't need to come down. In this case, the damage was too extensive for the tree to recover.
Kenton Morgan
Kenton Morgan
January 20, 2022.
Verified
Once again, RTEC has done a great job. The team showed up right on time and performed all the work that we agreed to. They kept us informed as to progress, coordinated with us concerning our maple, and made recommendations concerning ongoing support for our trees. At the end of the day, they thoroughly cleaned up the debris and left our yard in pristine condition. WELL DONE.
Jean Kluttz
Jean Kluttz
January 3, 2022.
Verified
Not our first time but this time was tricky removal of a large dead tree leaning on a healthy tree. Quick response for estimate, good timing to removal, all clear and healthy tree still fine.
Jerry Haggin
Jerry Haggin
December 16, 2021.
Verified
Very good work while ensuring that I was aware of status of my work order and planned completion.
Mike Iger
Mike Iger
December 16, 2021.
Verified
David Roberts
David Roberts
December 15, 2021.
Verified
We’ve used RTEC for many years for tree maintenance and can’t say enough good things about their service. We use them for tree trimming and for regular treatments to maintain our trees’ health and deal with pests and prevent disease. Their arborist Ben has been especially helpful with advice. RTEC also been especially helpful in emergency situations, once coming to cable a massive, heritage oak in our yard right before a hurricane was about to hit. Highly recommend.
Travis Larson
Travis Larson
December 10, 2021.
Verified
RTEC did an excellent job onsite of removing dead branches from our 80+ year old trees, and trimming other growth too close to our home.
Google rating score: 4.8 of 5, based on 185 reviews.

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