Tree Diseases Explained

Just like every living thing on this planet, trees are also, unfortunately, susceptible to disease. A tree that lacks either light, water, nutrients or carbon dioxide will struggle to stay healthy and thus be under stress, making it weak and open to contracting diseases. Environmental factors can play a big part in a tree’s health, which means particular seasons can increase the risk of them catching certain types of disease. 

This month, Artemis Tree Services will be covering what to look out for when diagnosing a tree disease.

Anthracnose tree disease as seen on the leaf
(Anthracnose disease)

Common Tree Diseases

Acute Oak Decline. This disease has affected thousands of oak trees in Britain. It became present in trees situated in drought-prone locations, where the pollution levels were high. Symptoms of AOD include black fluid oozing from the tree trunk where there’s missing bark or minor damage. 

Anthracnose. This disease typically targets ash trees, oak trees, maple trees, sycamore trees and other similar types of tree. To identify if your tree has Anthracnose, look for burnt-looking leaves or retreating branches if the tree is extremely weak.

Dothistroma Needle Blight. This fungus usually rears its ugly head in June/July time and changes the colour of the needles of a tree from green to yellow, and later on down the line, red. The affected needles will then begin to shed early.

Phytophthora Lateralis. First identified in 2010, UK, this disease causes tongue-shaped breakages in the bark and bleeding on the outside of the bark, which indicates more lesions underneath. Another sign to look for is red/brown leaves.

Phytophthora Austrocedri. This is a pathogen that discolours and kills off the foliage. Look out for cinnamon-brown coloured wounds on the branches or under the bark of juniper trees.  

Rust. This fungal disease affects the leaves of poplar trees, oak trees, ash trees, birch trees, maple trees and plum trees. To identify the fungal disease, you’ll spot small orange lumps that are full of powdery spores present on the leaves. You’re likely to spot this during the summer months, around August time.

Sirococcus Tsugae. Affects trees including atlas cedar, deodar cedar, cedar of Lebanon, western hemlock, eastern hemlock and mountain hemlock, across the UK. The symptoms include the changing of needle colour from green to brown or pink, fungus on needles and dying seedlings. 

Sweet Chestnut Blight. This fungus enters a tree’s wounds and fissures, and its symptoms include cracks in the bark, stem girdling, wilted brown leaves and orange growths on the bark.


How to tell your tree is in poor health – signs to look out for 

  • Bark abnormalities – visibly deep cracks or holes can be a sign of disease
  • Decay – mushrooms or fungus growing on trees can be a sign of disease
  • Dead branches easily broken and dry branches can be a sign of disease
  • Unusual leaf discolourationleaves changing colour before autumn can be a sign of disease
  • Growing at an anglea lopsided tree can be a sign of disease or damage

 


If you spot any obvious tree defects, call a local professional who will be able to assist you. Artemis Tree Services serve customers throughout the Hertfordshire areas, providing a reliable and professional service, whatever job we take on. To arrange a free site visit from our tree surgeons, simply contact our friendly team to discuss your project further.

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Paul

I thought the Artemis team were absolutely brilliant. From coming to quote , prompt , and cutting back 2 oak trees they did a highly Professional and excellent job.... I thought the Artemis team were absolutely brilliant. From coming to quote , prompt , and cutting back 2 oak trees they did a highly Professional and excellent job.

2 days ago

Jill, Pinner

Efficient, thorough. Listened to what we wanted and carried out expertly. All v neat and tidy. Good job all round....

1 week ago

J M

Thank you Artemis for your excellent tree surgery work as part of ongoing maintenance over many years. The garden poses problems, but as ever the team were cheerful, efficient and everything was carri... Thank you Artemis for your excellent tree surgery work as part of ongoing maintenance over many years. The garden poses problems, but as ever the team were cheerful, efficient and everything was carried out exactly as planned. I shall continue to recommend Artemis.

2 weeks ago

Green hill housing

we have had work done with them and they do a wonderful job, from start to finish everything was perfect again, not a leaf leaf left behind, workmen were polite and professional.... we have had work done with them and they do a wonderful job, from start to finish everything was perfect again, not a leaf leaf left behind, workmen were polite and professional.

2 weeks ago

Jan

Artemis took down two lime trees who's roots had damaged the garage floor and were an inch away from the foundations of the house . The trees were in a very awkward place to get to but this didn't see... Artemis took down two lime trees who's roots had damaged the garage floor and were an inch away from the foundations of the house . The trees were in a very awkward place to get to but this didn't seem to trouble this highly competent team. The team were extremely well equipped , and they worked together like a well oiled machine. We were delighted with their work, tidiness and very pleasant manner. And it was at a fair price.

1 month ago

David Pooley

Excellent value, great work on a terrible day...good lads!...

1 month ago

Diana Stuckey

Excellent service with experienced people who did an excellent job of pruning my tree. Would definitely use them again....

2 months ago

Jonathan

Martin and Luke arrived on time They were polite and did the job to my total satisfaction and cleared up Took the time they said it would when they arrived Well done!... Martin and Luke arrived on time They were polite and did the job to my total satisfaction and cleared up Took the time they said it would when they arrived Well done!

2 months ago

Phil

Very professional job. The man in charge was excellent. Did the job exactly as we wanted it. Would highly recommend....

3 months ago

Anonymous

I have used Artemis a number of times and always feel confident that they offer an excellent service all the way through from the first visit to the final clearing up. They are knowledgeable, profess... I have used Artemis a number of times and always feel confident that they offer an excellent service all the way through from the first visit to the final clearing up. They are knowledgeable, professional and friendly. They do great job and I would highly recommend.

3 months ago

Anonymous

Friendly staff. Work carried out efficiently. Left the area clean and tidy. Would definitely recommend Artemis....

3 months ago

Chris

Artemis are very efficient, knowledgeable, professional and easy to deal with....

4 months ago

David

This was the first time we have used Artemis, and the whole process from initial enquiry through to completion was very easy. We would definitely recommend their services, and will be using them again... This was the first time we have used Artemis, and the whole process from initial enquiry through to completion was very easy. We would definitely recommend their services, and will be using them again I'm sure.

4 months ago

Natasha

Fantastic service from your team at Artemis. We needed a tree in our garden heavily crowned, having let it grow far too tall. We couldn’t be happier with the work done; the team were so professional, ... Fantastic service from your team at Artemis. We needed a tree in our garden heavily crowned, having let it grow far too tall. We couldn’t be happier with the work done; the team were so professional, really lovely and left our garden tidier than it was before they arrived. We won’t hesitate to recommend Artemis to anyone needing tree work done

5 months ago

Anonymous

Excellent service from first quote to final job. Very good communications and reminders so I knew exactly when they were arriving. Polite and hard working team who cleared up perfectly. Would definite... Excellent service from first quote to final job. Very good communications and reminders so I knew exactly when they were arriving. Polite and hard working team who cleared up perfectly. Would definitely recommend.

5 months ago

Ajay Lal

Efficient and effective service. On site team were polite and ensured the site was left clean and tidy....

5 months ago

Anonymous

From approval for the pruning to tidying up after they left, the team has been impeccably professional, pleasant and kind....

5 months ago

Anonymous

Excellent service. Punctual and extremely professional manner in which they carry out their work. Really happy with the work done . Would definitely use the company again.... Excellent service. Punctual and extremely professional manner in which they carry out their work. Really happy with the work done . Would definitely use the company again.

5 months ago

Terry

We have been using Artemis Tree Services for many years now and have just had our annual tree and shrub maintenance visit. Wonderful job as usual. The garden now looks great thanks to a very hard work... We have been using Artemis Tree Services for many years now and have just had our annual tree and shrub maintenance visit. Wonderful job as usual. The garden now looks great thanks to a very hard working and knowledgable team. Thanks again, see you next year.

6 months ago

Anonymous

Excellent service from start to finish. Clear quotes, no jargon, prompt responses to queries and arrived on time. A large tree was expertly removed and recycled. The very professional and pleasant tea... Excellent service from start to finish. Clear quotes, no jargon, prompt responses to queries and arrived on time. A large tree was expertly removed and recycled. The very professional and pleasant team even removed the leaves from the lawn. Thoroughly recommend! Very reasonable pricing also. No hidden extras.

6 months ago

David Lynn

The team arrived on time, carried out all the requested work and left our garden neat and tidy. The tree work was as planned , we are very pleased and would recommend the company with no hesitation.... The team arrived on time, carried out all the requested work and left our garden neat and tidy. The tree work was as planned , we are very pleased and would recommend the company with no hesitation.

7 months ago