Author Topic: Mango Pests, Diseases, and Nutritional Problems (Read 535621 times)

Guanabanus · « **Reply #2150 on:** January 15, 2022, 08:18:04 PM »

There are two or three older threads about labs here on the Forum. A lot about Spectrum Analytic. Waters Agricultural is good analysis too.

Several other good ones also.

Be wary of accepting recommendations for Citrus to use on Mangos--- can be quite wrong.

Pan Dulce · « **Reply #2151 on:** January 16, 2022, 10:28:25 AM »

Has anyone had any success using potassium bicarbonate to treat powdery mildew or anthracnose on mango flowers?

It is part of my shoulder season rotation for treating powdery mildew and some other pathogens in my mist beds at work.

Pan Dulce · « **Reply #2152 on:** January 16, 2022, 10:34:59 AM »

Fliptop

The alcohol on Q-tip process is very effective on numerous insects, especially mealybugs when the outbreak first starts, or they are on just a few specimens.

Har

I appreciate all the mango knowledge your passing along!

Guanabanus · « **Reply #2153 on:** January 16, 2022, 11:56:25 AM »

Yes, Potassium Bicarbonate is useful. I include in some mixes--- haven't tried it alone. It raises pH, so don't include with products that are made ineffective by high pH.

Emirza24 · « **Reply #2154 on:** January 17, 2022, 09:49:33 PM »

Har,
please advise me how can I protect my mango trees from mealy bugs?
Thanks in advance.

Guanabanus · « **Reply #2155 on:** January 18, 2022, 12:00:22 PM »

Castille Soap Spray, or other potassium salts of fatty acids.

Oil spray, such as neem oil.

Azadirachtin-containing product.

Emirza24 · « **Reply #2156 on:** January 18, 2022, 10:10:09 PM »

Thanks for the reply Har.
Do I need to spray neem oil on the whole tree or just the trunk? I have about twenty trees and they are more than ten feet tall. Mealy bugs will start attacking my trees next month once the weather gets a bit warmer.

Guanabanus · « **Reply #2157 on:** January 19, 2022, 11:54:28 AM »

Spray on bugs.

Lovetoplant · « **Reply #2158 on:** January 19, 2022, 08:16:20 PM »

Har, what disease/nutrient deficiencies on the mango leaves? Pictures show top of the canopy and bottom of the leaves. Thank you

Guanabanus · « **Reply #2159 on:** January 19, 2022, 09:31:41 PM »

Perhaps a systemic disease, coming up from soggy soil?

Lovetoplant · « **Reply #2160 on:** January 20, 2022, 12:18:06 AM »

Quote from: Guanabanus on January 19, 2022, 09:31:41 PM

Perhaps a systemic disease, coming up from soggy soil?

This is happening to most of my 20 inch tall, 50+ seedlings inside the greenhouse. So you do not think it is powdery mildew, correct?

Any systematic fungicide/bacteriacide do you recommend?

Guanabanus · « **Reply #2161 on:** January 21, 2022, 05:57:26 PM »

Perhaps Organocide Plant Doctor, or similar Potassium Phosphite.

Lovetoplant · « **Reply #2162 on:** January 22, 2022, 01:23:58 PM »

Quote from: Guanabanus on January 21, 2022, 05:57:26 PM

Perhaps Organocide Plant Doctor, or similar Potassium Phosphite.

Thank you Har. Will give Monterey GardenPhos a try.

dm · « **Reply #2163 on:** February 11, 2022, 04:54:56 AM »

Three of my small, young mango trees have brown/black and curled edges and tips. Some have black spots.
I have definitely seen scale too.
Another tree (no pic) looks like it has black soot on it.

Thanks

PICKERING:

HONEY KISS

PPK:

Guanabanus · « **Reply #2164 on:** February 11, 2022, 01:32:55 PM »

Powdery Mildew.

dm · « **Reply #2165 on:** February 11, 2022, 02:57:21 PM »

Thank you much, Har!

pineislander · « **Reply #2166 on:** February 24, 2022, 07:50:12 AM »

A friend has two mango trees two years old with similar problems, one Mallika and one Glenn. Zone ios 10A east Lee County slightly inland, they had a light frost a few eeeks ago. Each appear to be from Zill nursery based on graft type. Each are planted identically in full sun & the owner used Lee County municipal compost to create a planting mound, and mulched with purchased Melaleuca mulch. They receive well water from popup sprinklers in the lawn. They are showing very slow growth and even before the recent frost had some die back of top growth. Almost all leaves have rounded tips. They may have gotten no fertilization the owner didn't mention using any.

The trees were both staked with 2 inch posts which appear to be treated wood. Could that be part of the problem?

What would you recommend to get these trees growing properly?

Orkine · « **Reply #2167 on:** February 24, 2022, 07:10:52 PM »

Are the roots in soil or compost?

pineislander · « **Reply #2168 on:** February 24, 2022, 08:59:14 PM »

Quote from: Orkine on February 24, 2022, 07:10:52 PM

Are the roots in soil or compost?

I didn't dig around but thinking about it today I expect the roots have mainly proliferated in the compost. That was probably a mistake but actually would have expected the mango roots to eventually get into soil, maybe they didn't. I am still wondering what the person could do at this point? Maybe cut around the tree once rains start put some sand around the root ball and hope it recovers? Dig it out and plant in sand? There is plenty of room on the property.

Guanabanus · « **Reply #2169 on:** February 25, 2022, 06:24:32 PM »

Typical decline from planting in compost. Not likely to improve until pruning, digging up, and planting on a sandy mound.

Give that compost to bananas; they will love it.

Epicatt2 · « **Reply #2170 on:** February 26, 2022, 08:36:00 AM »

Quote from: Guanabanus on February 25, 2022, 06:24:32 PM

Typical decline from planting in compost. Not likely to improve until pruning, digging up, and planting on a sandy mound.

Give that compost to bananas; they will love it.

Well Har,

I repotted my four mangos last year into 5-gallon & 7-gallon pots in a 1:1:1 mix of
coarse builders sand : milled sphagnum : leaf mold (this latter which I dug from my flowerbed around the azaleas)

They mangos all are currently growing ok and have just begun pushing inflorescences now as of this week.

I did fertilize them a few weeks ago with some 3-3-5, but very lightly.

I haven't seen any pests or problems presenting on the leaves or with their growth so I'm hoping that the mix they are in and the light fertilzing and minimal watering I have been giving them is about right and proper for mangos of this size. They are all between five ft and seven ft tall in their pots.

Would appreciate some comments on the appropriateness of my potting mixture and my fertilizing of these mangos, Har.

My four cultivars are" Beverly, Fairchild, Ice Cream, Irwin. ALl were sourced from TT in FtMyers.

TIA

Paul M.
==

Guanabanus · « **Reply #2171 on:** February 26, 2022, 10:29:15 PM »

Don't fix what isn't broken.

FIUPanther · « **Reply #2172 on:** March 06, 2022, 05:56:10 PM »

Attached below are pictures of the leaves of my Cogshall mango tree.

It produced mangos last year for the first time, but it did not produce flowers this year and the leaves do not look healthy. Even the leaves that are green are twisted.

Does anyone know what may be causing this? A deficiency of some type or some other issue?

I'm located in Pembroke Pines, FL.

Guanabanus · « **Reply #2173 on:** March 07, 2022, 09:22:45 PM »

Multiple micro-nutrient deficiencies--- especially Manganese deficiency. Look for chelated micro-nutrients. Also treat soil with granular Sulfur.

pineislander · « **Reply #2174 on:** March 08, 2022, 09:19:53 AM »

Quote from: FIUPanther on March 06, 2022, 05:56:10 PM

Does anyone know what may be causing this? A deficiency of some type or some other issue?

Be sure no one has used "Weed and Feed" fertilizer product on your grass. It kills broadleaf plants including fruit trees.
If that is the case, get back and let us know it would be a good example of what not to do.

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Author Topic: Mango Pests, Diseases, and Nutritional Problems (Read 535621 times)