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Messages - Guanabanus

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1
Malhar,
deficiencies of Zinc, Manganese, Copper, and Potassium.

2
Victoria Ave,

Better-spreading irrigation at the surface, and the shadecloth, would indeed both help.

You didn't mean to say 42-gallons on one plant, did you?

Shading / windbraking the planter box sides, with burlap or with potted plants, would also provide some relief.

I didn't see mention of a substantial source of Calcium.

3
Nicely detailed soil report.  Manganese is low in relation to amount of Iron--- should be similar amounts.

Plant looks good.

4
Victoria Ave,

A Valencia Pride that doesn't produce vegetative flushes for several years?  Very unusual!

What type of soil is it growing in?  Types of fertilizer?  Source of Calcium?  Frequency and amount of water?  Weather?

5
Nuraxi,

Looks complicated.

I recommend that you get a soil analysis and a leaf tissue analysis, testing for all the known plant nutrients, in each sample, including Sodium (Na) and Chloride.

6
Jose',
Probably cold-soil-induced deficiencies, of Calcium, Sulfur, Zinc, Iron, etc.  Red spots may be from thrips or from micro-mites.

7
Seedlings of pure sugar-apple, pure custard-apple, pure ilama, or pure soursop, are usually just as good as, or almost as good as, the mother tree.  Some indeed are worse.  Or take longer to fruit.  [pure = non-hybridized]

Seeds from hybrids can be wildly different.




8
I don't know anything about Annonas in relation to nematodes.

9
Perhaps hydrogen peroxide, diluted to 0.25%.  One and a half to two gallons of mix poured onto one square foot of the soil.  Weekly, until corrected.

Example:  11 pints of water (same as 1 gallon + 1 quart + 1/2 quart) plus 1 pint of drugstore 3% hydrogen peroxide.

If you buy a concentrate somewhere, remember that the concentrate can cause immediate blindness if it splashes in your eyes,
severe skin burns, or holes in your cotton clothes.

10
Stresses, such as cold soil and droughts, certainly make roots less able to fight off infections.

11
Did you add potting soil or compost to the planting hole?

12
Check with a magnifier lens, for mites. 

Or it might have phytophthora root rot.  The stems already look shriveled.

13
McRysh,
Looks good enough.

Maybe it has some urea in the soil mix or in the fertilizer--- and no Nickel, so can't make urease enzyme.

14
PineIslander,
Yes.  We have also done that using palm fertilizer on potted mangos, with 0.22% B.

15
DM,
What kind of soil were those mangos planted in?

16
Go ahead and plant.  On a tree with that many branch tips, there will almost always be some new growth somewhere.

17
I don't know of any variety that doesn't get MBBS sometimes.

18
Interesting.  I have never seen leafhoppers bothering mangos.  I don't know what the pits are from--- maybe the leafhopper?

In the lower part of the picture are two angular black spots;  maybe Mango Bacterial Black Spot.

19
Tropical Fruit Discussion / Re: What Is This Fruit?
« on: April 13, 2022, 09:27:50 AM »
Number one, yes.  Also known as Australian Beach-Cherry.

20
Tonyma,
First photo may be of a slight excess of fertilizer, especially of urea.
Second may be a little anthracnose.

No big worries so far.

21
I put pruned (and cut into straight sections) branches (less than 1 inch diameter of wood) and fallen leaves on the ground under fruit trees of any kind.

22
When sugar-apples are leafless, or nearly leafless, don't water them.

Also make sure it has some gypsum or lime.

23
No decomposable ammendment is likely to improve planting holes for mangos--- way likelier to sicken.

24
In soil mixes, 10% peat is great (up to 20%)  (by volume).

25
Spiders or spider-mites or webworms.

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