Kumquat Tree disease identification - help !

[Hamishtree]

I work in South London, which has a clay sub soil. This Saturday I have seen 2 Kumquat trees with the same symptoms and also have seen one a month ago which was identical.

The trees are thinning in their leaf canopy by about 20%, there are brown spots developing on the leaves and also holes too, possibly subsequent to the brown spots.

I have attached some photos below.

Has anyone come across this before ? I was thinking it might be due to long periods of dry and then long periods of wet weather, combined with a few very cold winters, but thats all a bit vague !

 

Thoughts would be appreciated.

 

Thanks for your time

[jwade]

I work in South London, which has a clay sub soil. This Saturday I have seen 2 Kumquat trees with the same symptoms and also have seen one a month ago which was identical.

The trees are thinning in their leaf canopy by about 20%, there are brown spots developing on the leaves and also holes too, possibly subsequent to the brown spots.

I have attached some photos below.

Has anyone come across this before ? I was thinking it might be due to long periods of dry and then long periods of wet weather, combined with a few very cold winters, but thats all a bit vague !

 

Thoughts would be appreciated.

 

Thanks for your time

 

Firstly these are Loquat trees, known as Eriobotrya japonica, I can see some yellowing of the foliage (chlorosis) which is fairly common on these trees. Not sure what the holes are, but it's probably some insect that has munched through them. The blotches could be fungal, apple scab (Venturia sp.) has been known to cause these symptoms - perhaps as a result of the wet spring?

 

Not much else I can add, I only grow one of these in a pot within a polytunnel in the hope that one day it'll be hot enough to get fruits!

[woodyguy]

Mine outside generally look like that. The older leaves get nibbled by insects but the plant keeps growing. Not something to worry about.

[Hamishtree]

Thank you.