I haven't had any problems with my trees until this week and it is only with this tree primarily. Last Monday it looked green healthy with no issues. Saturday I noticed ALL leaves looked desicated yellowed and curled. The curl was from the outside edges towards the midrib. A thorough soaking has done nothing to help. The tree has received two ounces of Vigaro Citrus fertilizer at the begining of each month since June. It also received a systematic insecticide in June. No September feeding due to TS Lee rains.

We did have a weather change that started Tuesday. After the TS it was about twenty degrees cooler. Lows at 60 and highs near 80.

Trees all around it look great. I have maintained a watering schedule and there is no way it needed water but it looked like it did. Also TS Lee just went through and we had plenty of rainfall. Today the yellowing leaves are browning and dropping.

I have noticed that on this particular tree there seemed to be a lot of mole activity. I have a three foot ring cleared around this and every tree. As I watered it each time I would see the mole tunnels. I don't know if that is a factor or not. They eat grubs not roots but could be exposing the roots to too much air. All my trees are about the same size and have been fertilized and watered the same. The rest of the trees except for an Owari are problem free.

The Owari has dropped 80% of it's leaves. I have three other Owaris and they look fine. It had about ten fruit which I have removed an eaten.

The fruit were solid green about 1 1/4" in size and tasted surprisingly good. Very juicy, peeled easy, good citrus taste and was not very tart with better sugar content than many I purchased that were supposedly ripe from the market. The remaining leaves are on the lower portion of the tree and look very good.

All the care information on the Glen applies to the Owari except no systemic was applied due to the fruit present. Skeeter even looked at them about one month ago and gave them a clean bill of health.

I may have caused this problem. Early on this tree was in my Jalepeno pepper row. The pepper was now taller (five foot tall and still growing) than the Owari and was shading it a lot. Additionally a Elephant Ear had sprouted about two foot away on the other side of the pepper. It was really happy there and it too outgrew the Owari and was really causing a shade problem with one of it's three foot leaves smothering the Owari.

I'm not sure if that could have caused the leaf drop or not.

Any thoughts would be appreciated. I'm sure the Owari will recovery but the Glen navel looks to be a gonner.

Pictures
Overall


Uploaded with ImageShack.us

Close up leaves


Uploaded with ImageShack.us

Base of tree


Uploaded with ImageShack.us

New growth from root stock


Uploaded with ImageShack.us

My second Glen Navel looks healthy


Uploaded with ImageShack.us

Overall garden shots Kumquat in front Glen Navel right rear


Uploaded with ImageShack.us

West side garden showing other healthy citrus


Uploaded with ImageShack.us

Looking across garden


Uploaded with ImageShack.us

Owari dropping leaves Sorry for poor photo


Uploaded with ImageShack.us

I had a citrus tree that died only about three weeks after planting. The first symptom of problems was the leaf tips changed color to brown and then the branches started dying back. A week later the tree was dead and it was removed and after inspecting the roots the problem became obvious, the tree died of dry rot. I did not know this at first though and thought it suffered an iron deficiency and applied iron to the soil which of course did nothing to help.
I bet your tree suffered some significant injury to the roots.

Agree root damage.

What should my next step be?

I was thinking of washing the soil from the roots, lifting it and examining the roots and soil for problems.

In addition I would cut back all the branches and after replanting hope for new growth.

You should inspect the roots for visual damage (Moles or other critters) and also take some soil from the root ball & have it tested for toxins.

It does look bad for the Glen Naval--Is there any green stem above the graft? I would take it up and look at the root ball. Clearly the heavy rains we had could have contributed to the problem--especially if the root ball that came with the plant is sort of soggy soil.

I would dig up the tree and wash off the soil. Healthy roots will be yellow/orange (older roots) to white for new roots. Dead roots will be dark brown and soggy. Trim off all the dead roots and gut the top back dramatically. Clearly, there is a little life there with the new growth from the rootstock--it does not look good for the top, but if there is any hope, this may help.

BTW--Thanks for the help yesterday.