Mango problem: salt?

[BluePalm]

I have attached a picture of an unhappy Fairchild mango tree. We have a lot of mango trees in this yard, and all of them are robust, healthy, and green except for our small Fairchild and our small-medium Graham (both are in different parts of the yard and near other, healthy mango trees). Both the Fairchild and the Graham are light-green in color and exhibit this type of leaf damage (see attached pic). The yard is on a barrier island about 1/4 mile from the ocean. The soil is sandy and most mango trees LOVE this yard. The trees are fertilized moderately and watered regularly (with fresh city water; not salty well-water). Note in the picture that alot of the damage starts mid-way up the leaf, on the edges and works its way in.

 I think the damage is from salt.

Is it the type of rootstock used on these two trees that would cause this, or are the Fairchild and the Graham salt susceptible (i.e. would the Fairchild and Graham grow just fine if they were on another rootstock)?  Thanks in advance for your input.

[puglvr1]

Hi Bluepalm, I'm not positive but it does look like some sort of "salt" burn, especially living that close to the beach. When I lived in Miami many years back...driving by neighborhoods that was close to the beach I noticed some Mango and Lychee trees with similar issues?

I'll bump this thread back to the first page in hopes that some of the experts will see it and help figure out what the cause might be or give you some advise or answers.

I know its nothing you're doing as I've seen many pictures of your fruit trees and they are all very healthy and thriving!!

Good luck!!

[ofdsurfer]

Hi bluepalm,

I'm 150ish yards from the beach so after a couple of days with onshores some of my mangoes get salt burn on there leaves.  The salt burn from salt spray looks different on my trees, the browning starts at the leaf tips and travels up the leaf for an inch or so.  I have had great luck with using sapodilla as wind breaks for my other trees.

[ofdsurfer]

This is what the salt burn looks like on my mango leaves.

[Guanabanus]

Yes, it can be a salt burn, particularly from excess Nitrogen when the soil stays too wet for two long.

It can also be from not enough Potassium.

It can also be from Powdery Mildew.