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thanks
Dieback can be caused by mechanical injury or disease, probably a fungal disease. Use a sharp clean pruning saw and cut back at least twelve inches into good wood if you can. There should be no black in the twig pith. Bag the trash the debris. Make sure you clean the saw well after, so that you do not transfer any disease to another part of the tree. It is no longer recommended, but because I do live in a humid climate, I do use pruning paint on cut ends that are bigger than 1/2 inch. Make sure you make a proper pruning cut to make sure it is clean and you don't end up peeling off more of the bark.
This is a good site for diagnosing citrus problems.
https://extension.arizona.edu/sites/exte ... az1492.pdf
How to make proper pruning cuts.
https://csfs.colostate.edu/pdfs/613.pdf
Most of the problems I see with citrus, besides the ants and aphids are from Trestiza. Nearly all of the citrus here have it, so it is important for me to have my citrus grafted onto resistant rootstock. The tree will still succumb to the disease but it will take about twenty years and I will still get good fruit from the tree as long as I feed it and water it properly. I do prune my citrus every year to control the height and I treat for ants, but citrus does not like heavy pruning so I prune only what I have to but I prune a couple of times a year.
This is a good site for diagnosing citrus problems.
https://extension.arizona.edu/sites/exte ... az1492.pdf
How to make proper pruning cuts.
https://csfs.colostate.edu/pdfs/613.pdf
Most of the problems I see with citrus, besides the ants and aphids are from Trestiza. Nearly all of the citrus here have it, so it is important for me to have my citrus grafted onto resistant rootstock. The tree will still succumb to the disease but it will take about twenty years and I will still get good fruit from the tree as long as I feed it and water it properly. I do prune my citrus every year to control the height and I treat for ants, but citrus does not like heavy pruning so I prune only what I have to but I prune a couple of times a year.