Question
QUESTION: I live in south of Spain and in my small back yard have a lemon tree which was fine since last 5 years. But since last year the leaves have turned yellow and there are very few leaves on the tree. The fruit since last year is also very less and very small. I have tried to over water it and under water it and have used iron supplement to revive the tree.
Last week we had a local gardner come and he has pruned the tree and pointed out that a small patch of bark (about 4x6 inches) from the the lower trunk has fallen off and hence the reason for yellow leaves and little fruit. Is there anything that can help the tree?

Many thanks

ANSWER: Nijka:

When the bark becomes loose and falls from the tree, this indeed may be an indication of some level of internal decay, which in turn will interfere with normal plant function.  This can show up on the tree as yellow leaves and reduction in the quality and quantity of fruit.  It is difficult to tell how much decay is inside, but the process is irreversible.  It is caused most often by an injury to the bark, then bacteria and/or fungus gain entry then initiate decay that is sometimes slow, but progressive.  There will become a point where the tree will not respond to fertilizer and water and succumb.  Replacement will be the only option at that point.  Your description sounds like this is the most likely scenario.

If you wish, you can send a closeup photo of this 4 X 6 area and I can maybe offer additional information on what I can see in your image.

Regards
Steve



---------- FOLLOW-UP ----------


Lemon tree in Spain   QUESTION: Many thanks for your time and advice. I attach a picture. The bark does not seem to be loose. There are new leaves growth on the tree and even has a flower. The patch has grown bigger since I saw it last and 'de - barking' seem to spread upwards. Is there anything that can be applied to the tree to help.

Thanks again

Answer
Nijka:

This is a rather significant area as seen in your photo.  Please re-read my earlier response.  Keeping this area dry may help some, but may be difficult. I wish there was a magic bullet. I can see that the tree is attempting to heal itself around the perimeter of this area.  Trying to maintain vigor is the best thing.  The tree may "hang in there" for sometime.  This affected area will also physically weaken the tree and may often become a home to insects such as ants/termites and other "critters". They use the dead portions as a home, but do not themselves cause the damage- merely the result.

Steve