Mango Pests, Diseases, and Nutritional Problems

[Julie]

This is my Carrie mango. Is this classic iron deficiency? I live in Miami where there is a limestone bedrock. Is it necessary to apply multiple chelated iron soil drenches per year or should I just treat it as needed?

[Julie]

This is my orange sherbet mango.


There is some black spot on the new growth



I also found these small flies on the undersides of all the leaves

[Julie]

This is my cogshall mango, it has black spots primarily on the undersides of the leaves

[Julie]

This is my Pickering mango. There are black spots on the leaves more so on that he undersides.

[Honest Abe]

Jake fruit, like Har said, as an example, my “Keitt” had the same dark tint on all
Blooms and is totally healthy now and setting a bunch of pea size mangos.

Har, I continue to thoroughly enjoy reading your vast knowledge this thread.

[Guanabanus]

Julie,
Yes, your Carrie probably is also deficient in Iron, but I believe that the color-pattern refers more to Manganese deficiency.

Your Orange Sherbet's new growth looks deficient in Zinc and Sulfur.

Often these undesireable colors show up from root inefficiencies during cold and drought.

I usually treat with multiple chelated micro-nutrients, rather than single-element treatments.

The various tiny spots on the leaves are less important.  They tend to get less frequent when the trees' nutrition is improved.

I don't know from fly identification.

[Julie]

Thank you so much Har for responding I really appreciate it. Do you know of any organic products you could recommend for mango nutrition? I’ve seen your YouTube video where you recommend K Mag so I will get that, do you have any products you could recommend for iron and other nutrients mangoes need?

I’ve been able to find chelated iron and chelated manganese from Albion Organics and I’m considering azomite and kelp meal for the micronutrients but I have no experience with this and don’t want to hurt my trees.

[Guanabanus]

Those products are good.  Add to those chelated Zinc, and Epsom Salt.

[K-Rimes]

Looks like the Black Death to me. All other potted mangoes I’ve had have met the same fate. Any thoughts or is it a goner? I’ve tried copper fungicide, serenade, etc no help. Is it possible to lop the top off and the bottom will re grow? It is still moderately healthy below.

[Guanabanus]

That looks typical of mangos planted in rich black soil and over-watered.

[bsbullie]

Looks like the Black Death to me. All other potted mangoes I’ve had have met the same fate. Any thoughts or is it a goner? I’ve tried copper fungicide, serenade, etc no help. Is it possible to lop the top off and the bottom will re grow? It is still moderately healthy below.

Is that in a pot?  Purchased from Florida?

[K-Rimes]

That looks typical of mangos planted in rich black soil and over-watered.

I fixed this about a year ago. It is planted in about 70% sand, 10% pumice and 20% black soil. It was doing fabulously till a week ago.

[K-Rimes]

Looks like the Black Death to me. All other potted mangoes I’ve had have met the same fate. Any thoughts or is it a goner? I’ve tried copper fungicide, serenade, etc no help. Is it possible to lop the top off and the bottom will re grow? It is still moderately healthy below.

Is that in a pot?  Purchased from Florida?

It is in a 25 gallon pot 70% sand, 20% black soil, 10% pumice. It is a grafted Florida plant but had been living in CA problem free for a year. I thought my greenhouse would save me this winter but evidently not. Interestingly, it survived better without it.

[sapote]

Looks like the Black Death to me. All other potted mangoes I’ve had have met the same fate. Any thoughts or is it a goner? I’ve tried copper fungicide, serenade, etc no help. Is it possible to lop the top off and the bottom will re grow? It is still moderately healthy below.

Cut the brown wood (dark brown or black stain inside the woody part) off until get the the healthy wood. The remain trunk will grow out. Grafted mango plants from FL have this issue in California. I suggest to grow from seedling then graft after it bear fruits.

[K-Rimes]

Looks like the Black Death to me. All other potted mangoes I’ve had have met the same fate. Any thoughts or is it a goner? I’ve tried copper fungicide, serenade, etc no help. Is it possible to lop the top off and the bottom will re grow? It is still moderately healthy below.

Cut the brown wood (dark brown or black stain inside the woody part) off until get the the healthy wood. The remain trunk will grow out. Grafted mango plants from FL have this issue in California. I suggest to grow from seedling then graft after it bear fruits.

I bought this one before finding out about the seedling thing - have Florida seedlings a plenty now, all growing happy in the sand based soils. I chopped right back. Sad, but kinda had to.