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 - pagnr

Pages: [1] 2 3
Citrus General Discussion / Re: Is Shunkokan polyembryonic ???
« on: July 15, 2021, 09:45:45 PM »

Citrus General Discussion / Re: Grafting citrus fruits
« on: July 15, 2021, 09:45:12 PM »
Some people also multi graft varieties onto one rootstock, or onto an existing variety, mainly to get different fruit from one tree in small spaces.

Citrus General Discussion / Is Shunkokan polyembryonic ???
« on: July 13, 2021, 06:22:54 PM »
Hi, just wondering if Shunkokan is polyembryonic, or otherwise reasonably true from seed ??

Yes I don't think it would be a big issue, as you say depending on varieties and cultivation conditions.
Tomatoes, cucumbers etc are commonly grafted on seedling rootstocks. These would be as tender as young Citrus, maybe more so ??
Here they use grafting clips/pegs to hold the graft closed. I found these pegs also useful for very small citrus grafting to hold the small buds or scions in place before taping.
Also Buddy Tape or Parafilm was highly useful and much easier to "tie off" than regular tape.

It's a long shot but any chance it's some form of graft chimera that developed on your tree ?

One issue I wondered about is that graft height or budding height does not change as the plant grows taller.
Basically the graft union stays at the same original height.
Grafting on very small seedlings, could mean that the graft line is going to be at 2 or 3 cm for the life of the plant.
There is a preference for higher graft heights overall 20 cm for orchard trees for protection from fungal disease.
On the other hand, I have read that Japanese Citrus is budded quite low to reduce suckering.
I find it more difficult to work low on a plant, so often bud higher, also for size matching and ease of taping.

Citrus General Discussion / Re: picking cutting for propagation
« on: July 03, 2021, 06:33:38 PM »
Layering or Marcotting is an alternative, where the "cutting" is started while still attached to the tree. It is more often done on older branches.

Citrus General Discussion / Re: picking cutting for propagation
« on: July 02, 2021, 03:36:36 AM »
For a cutting, the stem needs to be physically strong to stand up by itself in the rooting medium, after being pushed or dibbed into a hole etc.
The leaves need to be hardened enough to keep their shape and not droop, or not too much.  If you are pruning fresh cuttings and they basically wilt straight away they are too soft. They probably need to be able to retain their shape for a while after cutting to succeed.
You might get away with softer stuff under extra care or mist systems.

I have had problems with pine bark mixes based on uncomposted pine bark fines. Mycelium totally took over, grey white threads throughout and yellow toadstools sprouted.
It took several years to calm down until fungus got in balance. If I remember, might have been some water repellence problems with the mix.

I think this video gives a good run thru of the textures of various soil less pot mix components that are useful.
The size and grade of the individual granules gives texture.
You need to get a balance of water holding and AFP air filled porosity, which is air content of the mix.
The sand I like is about the grade of coarse brown sugar.
In my climate I need a mix that can be watered daily, but not stay saturated.
For larger plants I use pine bark based mixes.

I don't use vermiculite anymore as it tends to float out onto the top with watering and is not as physically durable as harder items.

I use 33% peat or coir/ coco peat, 67% coarse sand for seed propagation.
60% blonde peat, if that's young marsh peat seems high.
Some people use high % coco peat mixes, but there are quite a few grades of this available.
Marsh peat tends to be far more pH acidic than coir/coco peat, so high levels of this could be a problem in itself without pH adjustment.

Tropical Fruit Discussion / Re: Carmen Hass Avocado
« on: June 28, 2021, 05:17:58 PM »
Thanks for the reply, I was hoping there was more to it, but as a suspected limb sport, not a seedling of Hass, I guess it is going to be closer than other newer Hass types. There are some reports that Carmen Hass is earlier, smaller and rounder than the usual Hass.
Can anybody growing it differentiate the fruit from this var ??

Tropical Fruit Discussion / Carmen Hass Avocado
« on: June 25, 2021, 07:31:22 PM »
I am trying to track down Carmen Hass Avocado fruit in Australia.
Anybody have any good pics or tips on telling the fruit of this Hass var from other Hass types.
Any info on seed shape, skin colour, flesh colour or texture compared to other Hass.
Hass are in season over here now.

I would install the irrigation system well before its actually needed, even now,  and start running it to fine tune it.
Then you will get a good feel of how it works in your soil mix and in different weather patterns.
Then you can better predict how the system will behave while you are away, and set it accordingly.
A few people I know have set up auto garden systems close to when they leave for holidays,
only to find that the pressure changes has blown off a connector clamp, and the system didn't function.

Citrus General Discussion / Re: Exciting Cure For HLB
« on: May 18, 2021, 07:07:08 PM »
I don't know the mechanisms, but plants certainly produce various chemicals,
anti bacterial, anti fungal, anti viral, insecticides, feeding inhibitors, even outright toxins and poisons.
Many of these have long been extracted by us as medicines spices, or horticulture treatments.
I think there is some evidence that plants can link up via roots and send chemical messages to each other re pest attack.

If these finger lime extracts prove successful against HLB, I hope it sets a trend for further research along these lines.

Citrus General Discussion / Re: Big pot size for citrus?
« on: April 20, 2021, 06:13:45 PM »
Here is a recommendation from Australia, constructing 200 litre containers.
The tree you put into a large container should be well developed, it can often be a problem to put a small tree straight into a large pot.
A small plant doesn't pump out enough water from the pot media.

Hopefully no location problems seeing this link ?

Citrus General Discussion / Re: Endangered Bees
« on: April 18, 2021, 06:01:45 PM »
Insects can't be classified as an endangered species under the current law

Seems like a strange situation and rather large oversight ??

Citrus General Discussion / Re: Shiikuwasha
« on: April 11, 2021, 07:52:34 AM »
So sad CCPP doesnt have Shiikuwasha. Its one of my favorite citrus and i look everywhere for it whenever I'm in Japan.

Any particular places to look for Citrus fruit in Japan ??
I've only tried supermarkets, fruit shops and sometimes gardens.
Not much too unusual there.

Citrus General Discussion / Re: Orange Pollen: is it sterile ?
« on: March 16, 2021, 05:06:16 PM »
I thought the issue was that they are genetically triploid i.e. 3 sets of chromosomes 3N,  not diploid ( 2 sets, 2N ) which is the usual arrangement with most living things.

When the haploid ( 1N ) pollen is made from half set of the triploids chromosomes, the triploid plant makes  pollen with an odd set of chromosomes.
These are "sterile" because the chromosomes can't successfully combine with the set in a recipient ovule.

Citrus General Discussion / Re: Etrog (citrons) - Jewish holiday fruit
« on: March 08, 2021, 05:47:43 PM »
Here is a movie partly about looking for the perfect Etrog

According to Nan and Hugh Nicholson, expert Australian rainforest tree growers, finger limes are slow to establish from cuttings.
They are in the subtropical Nth Nsw, probably an ideal environment to wait for roots to form.
You might try pre callousing the cutting while it's still on the plant, i.e. wound and heal before trying to strike.
What else are you doing ?? Covering with plastic bag? Bottom heat ?? Rooting hormone ?? Anti drying dip ??

Finger limes are reported to have a high % of male flowers. Thats one reason they seem to flower heavy, but have lower fruit set.
You could inspect some flowers and count the ratio to see if that holds true for your plant.
Some high yielding type might have a better ratio.
You only need to hand pollinate female flowers. Active insect pollinators might be better.
I think a lot of the hybridisation has been fingerlime pollen into Citrus flower, as it is easy to quickly pick the hybrids.

Citrus General Discussion / Re: Citrus australis as rootstock
« on: January 01, 2021, 07:27:57 AM »
Hi Mike, re C. garrawayi. I asked a friend who is familiar with the Rockhampton plants. He says they are all gone now, except for a smaller seedling or sucker.
There was also a plant at the Canberra Botanic Gardens some years ago. It was about a metre tall, outdoors, straggly. Canberra gets pretty cold at times. Not sure if it is still there.
The UC Citrus collection in USA has 3 accessions of C. garrawayi.

Citrus General Discussion / Re: How to control thrips
« on: December 31, 2020, 07:21:38 PM »
I had a lot of trouble with thrips on Kaki persimmons in pots for a few years.
I gave up spraying chemicals when it seemed that wetting agent application seemed to control the larvae stage in the pots.
The larvae go down to the soil as part of the life cycle, the return to the foliage for he next stage.

Also a misting nozzle on a wand, that can get under the foliage and spray upwards is useful for chemical application.
The larvae are usually under the leaves.
Even high pressure low volume water mist sprayed under the foliage can knock a lot of larvae off, and interrupt the cycle.
Not sure if you have exactly the same thrips as here, but this worked for me.

Citrus General Discussion / Re: Citrus australis as rootstock
« on: December 31, 2020, 06:58:55 PM »
Yes, I saw that you are talking about C. australis. The use of inodora and possibly suggested virgata could indicate that Microcitrus can be used as Citrus rootstock ??
As seedlings I have found Microcitrus slower to get to good size than most other Citrus and especially Citrus rootstocks.
I can't see why you couldn't use them if you had nothing else, I don't know if it would be my first choice if I could get something else.
There might be compatibility issues with some Citrus types??

Pages: [1] 2 3