Tropical Fruit Forum - International Tropical Fruit Growers

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - Guanabanus

Pages: [1] 2 3 ... 94
Ivan79, that "internal break-down" is usually thought to be a result of not enough Boron; or Calcium deficiency; or, indirect Calcium deficiency, due to deficiency of Copper or Zinc or Magnesium or Boron; or due to too much Nitrogen.  Likely, a mix of these interpretations.

BPelky, I don't know that white grub, presumably a larva of a beetle.  If it is simply eating dead, rotten wood, we wish it well.  I can't tell from the photos if it harmed live wood.

Ridiculous yard guy.

Besides Mango Bacterial Black Spot --- the smaller, coal-black, raised spots  with splits and lines of ooze running down--- your mangos also appear to severe cases of "The Rot"--- the very big brown spots.

Your mango is a Kent--- no longer recommended for new plantings, precisely because of what you are seeing.

Check your fruits three times a week, immediately removing from your tree and from your yard, any infected ones, before the ooze gets dissolved and spread by rain.

Spraying with a Copper Fungicide/Bactericide may also help a little, but SANITATION HARVESTING will help the most.

"Agriculture Tax Rate", NOT "exemption."

Tropical Fruit Discussion / Re: Cow Breast Orchid, Uvaria grandiflora
« on: June 07, 2019, 11:03:56 AM »
Susung-Calabao = Teats-of-Water-Buffalo.  If you just say Carabao/Calabao, you are speaking of Water-Buffalo.

The tender growth at the bottom of the picture appears to be infected with powdery mildew.  At the top of the picture, the topmost left leaf with midrib silhouetted against the white wall, appears to have a row of ... aphids maybe?  the tiny white spots on the other leaves kind-of look like galls from insect bites, maybe.

I don't see anything to urgently address.

Squam, I haven't seen anything like that second photo.

Southern Blush, Haden, Lemon Zest, are quite impacted--- in dry weather, little-to-no irrigation, coastal zone.

Last year, Burmese and Thai mangos, except Pim Sen Mun, were noticeably infected:  Elephant-Tusk, Po Pyu Kalay, Nam Doc Mai, and less on Chocanon and  Pram Kai Mea.

This year I have found MBBS on only two trees of Po Pyu Kalay, while ten or so are still clean.  The worse affected is a tree at the top of the hill, solitary, wind-whipped.

Last year, the first part of the crop of Kent and Keitt to reach near-maturity were destroyed by MBBS and various rots. After switching to every-other-day SANITATION-HARVESTING of problem trees, the remainder of the crop was slightly spotted and picked a little sooner than one would prefer, or even clean and well-matured.

My general impression is that nutritional sprays of Potassium Silicate, Kelp, and various Copper products, Chelated Calcium, and Boron, improve plant resistance.

And spray with Oxidate (Hydrogen Peroxide, with stabilizers suitable for plants, and approved for "organic production") can improve sanitation.  This is way too DANGEROUS for persons who are ignorantly cavalier about following precautions as specified on labels--- the concentrate can cause instant blindness and severe skin burns and open holes in clothing.  While mixing, one must have rubber apron, rubber boots, heavy rubber gloves, safety glasses and plastic face shield.  AFTER you are finished mixing, then the spray is very safe--- you'd probably be fine with safety glasses and a Speedo!

Vigilant sanitation-harvesting, only of problem trees, beginning as fruits near maturity, seems to make the most difference.  (A quick glance/ spot check of the other trees every couple of weeks will determine if any of those should be checked more.)  Look at both front side and back side of fruits, and check where they are touching each other and where they are touching branches.  Remove any with even the smallest raised, shiny-coal-black spot.  These fruits will be great for the world's many and varied recipes that call for green mangos.

Gozp, that fertilizer mix looks pretty good.  The label is inadequate, as it doesn't bother to list Magnesium, Boron, Copper, Chloride, or Molybdenum, even though the source materials listed do have those ingredients.

The temperatures just a week ago are not relevant, as those contortions of the fruits occurred way before that.

And if it is in sand, without a lot of visible limestone or shell-rock, and not being watered with limey canal or well water, then add gypsum.

Beats me!

What low temperatures did those misshapened fruits go through?

What sources and amounts of Boron and Zinc have you provided?

I haven't worked with Coco-Wet.  Does the label give advice about use in different weather conditions?  Did you use the low or moderate rate?

Adjuvants do often cause spray damage--- almost as often as the ingredients they are supposed to help.

Tropical Fruit Discussion / Re: Mangoes seeds that breed true.
« on: May 26, 2019, 02:18:30 PM »
Visual inspection relies on having many young plants of the same polyembrionic seed source to look at.  One can soon figure out what the consistent characteristics of the majority of plants are---the majority are the clones.  One can then remove the "off-types", if one wants the clones;  or, one can remove the clones, if one wants to grow out the "off-types"/ sexualy-produced seedlings, to see what they will produce.

Tropical Fruit Discussion / Re: New guanabana disease?
« on: May 26, 2019, 02:11:26 PM »
Cookie Monster, do you see any larvae in the pulp?  In Brazil there are moth larvae that destroy soursop fruit, leaving large black marks on the surface.

Tropical Fruit Discussion / Re: Mangoes seeds that breed true.
« on: May 26, 2019, 11:52:23 AM »
Actually, any seed produced by "breeding", meaning by plant sex/pollination, is not a true copy of the mother tree.

Only those extra embyos produced in polyembionic seeds are true copies of the mother tree/seed parent.  They are produced by cloning;  they are not bred.

Temperate Fruit Discussion / Re: Cherimoya/Pawpaw hybrid
« on: May 22, 2019, 03:48:06 PM »
Thank you, Ilya11, for finding that very recent paper!

I am surprised at the implication that we have been producing triploids and tetraploides all along, simply by interspecific breeding. 

None of the interspecific hybrids that I produced were seedless.  Quite a few, however, were fruitless.

Those beetles do pollinate, but they are much larger than Nitidulids.

Temperate Fruit Discussion / Re: Cherimoya/Pawpaw hybrid
« on: May 21, 2019, 03:00:28 PM »
A paper published in Australia in 2014, indicated a lack of success, up till then, in producing tetraploids of atemoyas [called "custard-apples" over there].  I haven't seen any updates.

Tropical Fruit Discussion / Re: Which Atemoya?
« on: May 16, 2019, 10:25:16 AM »
The easiest way to avoid being careless or too loose with terminology about Annona hybrids, is simply to call them "Annona Hybrids".

True "Atemoyas" ["ate" = Sugar-Apple", and "moya" is short for Cherimoya] are crosses of Annona squamosa with Annona cherimola, ONLY.
This word was coined by an early Annona hybridizer, over 100 years ago, for this type of cross.  Either of these two species may be the seed parent or pollen parent, and the total ancestry may be in any proportion, such as 1/8 to 7/8 Sugar-Apple, or Cherimoya.  So this definition is somewhat loose, but within reason, as a popular term. 

What looses meaningfulness, is to allow, without objection, the word "atemoya" to be used for any Annona hybrid, or, even, as one now often sees, any non-Soursop Annona at all.

So the Annona Hybrid 47---18 is not an "atemoya".  In my Annona breeder's specific terminology, it is a "Temoylata" [Atemoya seed parent, pollinated by Annona reticulata].

I do recommend the 4---5.  I don't know of anyone's currently selling it, and I don't have it.

My lecture tonight:  "Making Annona Hybrids", will be at the Mounts Auditorium, 7:30 PM meeting of the Palm Beach Chapter of the Rare Fruit Council, with lots of beautiful slides.

The frustrating part is that almost all of the hybrids pictured, no longer exist!

See the info in the old thread that I just bumped up: "hungry for more info...on Annona hybrids."

I willl be speaking tonight at the Palm Beach County Rare Fruit Council, on Making Annona Hybrids, will lots of beautiful pictures.

In south Florida, Nitidulid beetles pollinate Rollinia and true Annona species.  Bigger beetles and bull ants appear to pollinate Guanabanus species [soursop and related species].  Carrion flies pollinate dark-red-petalled Asimina species.

Encourage presence of Nitidulid beetles, which are only a couple of millimeters long, by allowing fruits, especially citrus, to to be available to the beetles as the fruits rot on the ground.

I have never seen, nor heard of, any species of bee pollinating any Annonaceae.

Not to be confused with 'Edgar' mango, available in Florida.

The problem of finding flowers only at the same sexual stage, and the problem of going more than one day between stages, occur during overly cool weather.

Pages: [1] 2 3 ... 94
Copyright © Tropical Fruit Forum - International Tropical Fruit Growers