My red lime citrus dying. Please help.

[vimalans]

Hi,

we had a healthy red lime citrus tree. It is in ground in north Florida. It produced a ton of limes this year. However when it finished fruiting it started dropping leaves. It’s branches are dying. I can’t tell what’s wrong. It is in a very bad shape Now.

It is well watered and fed. Please help.

The first picture is from when it was healthy



These are how it is looking now.

[Laaz]

May be tristeza...