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Messages - Guanabanus

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Did this show up after Hurricane Ian?  Did you get winds near Category One?

Unable to magnify.  What I can see looks healthy.

Something that is alluded to several times above, but not clearly emphasized, is that natural chemical content of different varieties of one species can vary dramatically; and that samples gathered from a single tree at different times of year, also vary from near zero to potent.

Studies in Puerto Rico of the ingredientes of Soursop (Guanabana, Graviola) pulp aroma, found over a dozen chemicals, which in different varieties were "all over the map" in concentrations or absence.

Studies at Purdue University, by pharmacognocist Jerry McGlaughlin, using brine shrimp assays to find alkaloids for futher study in uses against cancers, found that some samples from Soursop trees had nothing to offer, while others were of value.

He also found that Pawpaw twigs, gathered at most times of year had very weak alkaloid content, but gathered in May, were potent.

Tropical Fruit Discussion / Prepare now for Hurricane Nicole
« on: November 07, 2022, 02:50:09 PM »
Hurricane Nicole is said to be on its way to the east coast of Florida.  We are under Watch since 10:12 this morning.

Let it make small fruits, then remove the whole flower pannicle.

Jake Fruit,
Maybe anthracnose, maybe mango bacterial black spot, or other.

The middle picture looks like Powdery Mildew, maybe,
the others, I have no idea.

Tropical Fruit Discussion / Re: Annona scleroderma taste issue
« on: October 25, 2022, 11:37:06 AM »
I have tasted a couple of scleroderma fruits that had "off"/"medicinal" tastes;  but usually they taste great.

Tropical Fruit Discussion / Re: My 'Sri Kembangan' carambola
« on: September 22, 2022, 09:39:28 PM »
Unpruned, Carambolas get over 50 feet tall and plaster the ground with fallen fruits.  Trying to prune them at that point doesn't accomplish much, as they regrow like rockets.

Keep them small from the start, by bending branches into arches, all within easy bare-handed reach.

Long vertical splits of the corky outer bark is normal maturation.

Short splits with gummosis or running ooze are not normal, and are said to be from "abiotic stresses"--- still rather debated.

Amy K,
Spray with Copper.

I normally expect to apply granular fertilizer;  then anything added to the irrigation or spray is extra.

Spaugh's recommendation on that other thread sounds reasonable.

Not Potassium deficiency.  Likely salt burns/sunburns.

probably aphids or scales.

Tropical Fruit Discussion / Re: Ilama
« on: August 21, 2022, 10:17:23 PM »
Nice leaf study.

I never got any viable seedlings of squamosa X diversifolia or of diversifolia X squamosa, but with so many diverent varieties to try, who knows?

Whitewashing tree trunks with lime is a traditional esthetic practice.  Doesn't hurt.  Helps?

Potassium deficiency.

Fruit Grower,
Trunk sunburn or freeze damage,
Weed whacker or wheelbarrow damage.

Cut whole tree off below the damage to re-grow from there,
or leave as is, and
keep tree very short, until wound heals over.  It will become hollow there.

Eddie F,
One pound gypsum per two pounds 6-3-16.  The other fertilizer is not likely appropriate for mangos.

I don't know anything about how far seepage will go.  I imagine that that will vary per soil, etc.

High nitrogen will degrade the quality of most mangos, perhaps India-type especially.

Nam Doc Mai is tolerant of high-Nitrogen.

Girdling starves the roots.

Chipping just above buds that you want to grow, will probably work.

Copper, Calcium, and Silicon are important to strengthen wood.

Have you done a soil test?

Normal bark aging, probably.

Probably a mineral imbalance, such as a Boron deficiency.

Looks as though a large insect or snail scraped the surface of the leaf.

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