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Messages - Guanabanus

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Tropical Fruit Discussion / Re: tree labeling
« on: January 19, 2024, 09:25:38 PM »

Healing of the graftwood to that green bark is not likely.  We normally cut through the bark to the white wood.

Tropical Fruit Discussion / Re: Annona edulis?
« on: January 19, 2024, 09:17:11 PM »
Thank you for the update.

Tropical Fruit Discussion / Re: Illama germination
« on: January 19, 2024, 09:13:30 PM »
Add garden supply diatomaceous earth, against grain weevils.  Store seeds in paper bag.


May be a nutritional issue, or micromites in the buds, or Fusarium fungus in the twig veins.

I would cut off that whole tip at the green tape, and throw pruned off part in the city trash.
Then spray the fresh wound with hydrogen peroxide, and the whole plant with a Copper fungicide
and a micronutrient mix and seaweed extract.


The base of the trunk appears to have been weed-whacked months ago.
The roots then starved, and they are now being eaten by fungus.

Throw out.  Try again.

Eddie F,

Mango scale.  Spray with Spray Oil.

DM and Hipasfolk,
Spray with a micronutrient mix.  Be sure it contains at least 0.25% Zinc.
If that mix doesn't contain Copper, spray a Copper fungicide.  Follow label requirements.


Your mangos have Zinc deficiency.

Use a micronutrient mix that has at least 0.25% Zinc.  1% would be better.
Follow instructions on the product label.


July 3-6 photos.
Micro-nutrient deficiencies, especially not enough Zinc and Copper.

July 1 photos,
Damage by mango scab fungus on tender growth,
or damage by mirids or aphids,
or deficiencies of nutrients such as Boron and Zinc.

I don't know.

I have heard, but maybe it is just an urban legend, that a point like that on a fruit can balance a large drop of water or spray, well after the rest of the fruit has dried off.  And that the drop can lense (concentrate) sunlight onto the fruit skin, causing a burn.  Seems a long shot to me.

It is likely that spraying with soluble Silicon and micro-nutrients, including Copper, will increase the hardiness against sunburn and fungi.

Mineral deficiencies increase susceptibility to splitting, not enough Boron.  Be very careful with dosing.  Better to just make sure that any mixed fertilizers used contain all micronutrients.

Possibly Potassium deficiency on the older leaves.  Mite damage on the Kesar.

I am not close to sure, but possibly that results from deficiency of soluble Silicon.

Tropical Fruit Discussion / Re: LISA xTIKAL fruit
« on: May 15, 2023, 03:27:34 PM »

Tropical Fruit Discussion / Re: Tikal x Lisa fruit
« on: May 07, 2023, 10:20:50 PM »

Lisa  X  Tikal.  Seed parent first.

Tropical Fruit Discussion / Re: Tikal x Lisa fruit
« on: May 06, 2023, 08:44:53 PM »
Was Tikal the seed parent?  Or the pollen parent?

For Nickel and other traces, I just use Kelp extracts and micronutrients that contain them as "contaminants."

See Washington State's department of agriculture's special website that lists the "heavy metals" in ag products sold in that state.

Burned tips can be from deficiency of Potassium, or from deficiency of Nickel in presence of urea, or from Powdery Mildew--- if white powder was present on those leaf-tip areas when the problem first occurred.

The burned areas in the middle of the leaves may be from tree frog pee, or from the end of spray that was no longer well mixed, from lack of agitation.

Yes, current depth is good, or add another 1/2 inch of soil, also good.  Dont cover any of that horizontal portion, as that is trunk.

That is vegetative Mango Malformation, caused by Fusarium fungus infection inside the wood and bark.

Cut off, cutting into the wood of the trunk.  Sanitize wound with hydrogen peroxide.  When that dries, spray wound with a Copper product, preferably as Copper Sulfate Pentahydrate.

Or cut off whole top of plant, a couple inches below the infection, and treat the same.

Sanitize clippers or blade very well afterwards.

Spray with a Copper product.

The black mold-like fungus on the outside of mango new growth is largely harmless.  And not related to root conditions.

The root condtion sounds normal.  Did you cut the circling roots?

Hardening bark.

Veggie Professor,
Root inefficiency caused by dry, chilled soil, commonly causes episodic nutritional deficiencies of zinc, copper, calcium, sulfur, etc.
The small or misshapened leaves are very susceptible to infections.  I see mostly anthracnose--- grey-black --- and a few mango bacterial black spots--- coal-black.

Use mixed fertilizers with all the micronutrients, and use gypsum, and spray with copper and other micronutrients.  Avoid the 0-0-52 fad.

Caloosa, probably
Someone, or the wind, partially twisted off the fruit.  Where the stem was half detached, sap flowed. 
Later, the stem deteriorated and was unable to hold.

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