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Messages - pagnr

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851
Granite should be ok. It is ok for Aquariums also, which should be an extra indication of suitability.
It is inert, but unlike clay particles, perlite etc, doesn't absorb water. That could either be an advantage or disadvantage, depending on requirements.
Because of its density, it is not prone to float onto the surface like some other light components.
Very fine milled granite is a source of K, potassium in organic farming. Silica is also present, which is a mineral often ignored in fertiliser applications.

852
Citrus General Discussion / Re: Citrus hystrix/Makrut vs Biasong vs Samuyao
« on: November 01, 2021, 07:40:51 PM »
It is hard to say from that result. Obviously it doesn't give 100% thornless seedlings. Maybe if you grew more, it might throw a % of thornless seedlings.
Ether way you can propagate the thornless trait by grafting.

853
Citrus General Discussion / Re: Is this a rough lemon?
« on: October 30, 2021, 05:28:35 PM »
Looking at the images, it also looks a bit like Alemow or Colo, Citrus macrophylla.
https://idtools.org/id/citrus/citrusid/factsheet.php?name=Alemow

854
Citrus General Discussion / Re: Is this a rough lemon?
« on: October 27, 2021, 03:51:02 AM »
What color are the new growth and flowers?

Rough Lemon has pinkish/red new grower tips and pink flower buds. I have collected quite a few fruit from different rootstock suckers, and they can vary from very seedy to few seeds. Also can vary year to year. Fruit usually has a classic aureole/nipple on the underside.
Still can't see photos on the forum sadly.

855
Citrus General Discussion / Re: Australia Gering Up For HLB
« on: October 15, 2021, 08:00:27 AM »
The Army is too busy with Covid lockdown enforcement and backing up Emergency services,(Ambulance drivers). Not everywhere, Sydney and Melbourne have high cases.
I really hope the peptide works.

856
Citrus General Discussion / Re: PROBLEMS
« on: October 13, 2021, 01:56:49 AM »
Images seemed blocked for me in Australia. Might be a hosting / domain issue ?? or certificate issue ??
I can see the images from Mikkel here
https://tropicalfruitforum.com/index.php?topic=45382.0
but not from others.
Anyone else having problems ?

857
Citrus General Discussion / Re: Variegated section on Pink Finger Lime?
« on: October 03, 2021, 05:33:36 AM »
Images must be blocked for me in Australia ??

858
Citrus General Discussion / Re: Trying A New Growth Medium
« on: October 01, 2021, 06:07:07 PM »
Search the product and its SDS
Yes that is the best advice,
Also maybe do a small wet test or seed raising test before you repot with a new component.
Another problem I found was that for example Zeolite for pool filters is very hard and stable and well size graded,
whereas Zeolite for Cat litter was a softer mineral, full of fine powder and looks like it would break down.
Horticultural Attapulgite has been through a hardening kiln, making it light but stable,
whereas Attapulgite for cat litter or spill cleaning hasn't been hardened and isn't a stable particle, designed to absorb and be swept up for disposal.

859
Citrus General Discussion / Re: Trying A New Growth Medium
« on: October 01, 2021, 06:13:28 AM »
I thought Chicken grit was often Calcium based ?? Oyster Shell or Limestone, Flint etc. Benefits are the birds crop grinding process and additional calcium.
If so, either of these could influence pH upwards if used heavily in soil mix.

860
Why would anyone want a xponcirus hybrid except for those in a cold climate?

These ones rates high on juice taste tests. I read there are further siblings that are pretty close to "Orange" juice, and suitable for blending with other varieties. The HLB tolerance is the main factor. As you say, why otherwise choose an alternative to many other excellent varieties ??

861
Citrus General Discussion / Re: Osmocote Plus is cheap on Amazon right now
« on: September 03, 2021, 02:19:38 AM »
I think the Prills have been persistent for many years, even before the coating change.
I was recycling some pot mix recently and put it thru a mesh screen by hand. That disappeared the pills, and hopefully liberated any unused fert still there.

862
Citrus General Discussion / Re: reduced quality from purchased plants
« on: August 30, 2021, 08:11:19 PM »
How were they shipped to you, in their original pots, or barefoot packed in peat/ sawdust ???
Has the climate greatly and suddenly changed between the grow location and your place ??
If the plants were shipped and suffered shock, and then you repotted in new medium thats another shock.
I would give them time to resettle, maybe watch where you place them, i.e. not full sun all day.
The UV could be different, the night temp could be different ??
The original photos aren't too shocking to me.
I would give them time to resettle, maybe watch where you place them, i.e. not full sun all day.
I appreciate that this situation is disappointing.


863
Citrus General Discussion / Re: Strange new branches
« on: August 23, 2021, 04:37:36 AM »
Yes very vigorous, also the nodes are widely spaced on the long thorn shoots. Looks like the whole thing is stretched.

864
Citrus General Discussion / Re: germinate seeds in coco coir
« on: August 17, 2021, 05:48:22 PM »
rooting citrus cuttings in coco fiber/peat is much better, is that a true fact or is there something they forget to tell?

The media requirements for seeds and cuttings aren't exactly the same. If you use the same media for both, the water and humidity requirements aren't the same.
Citrus seeds are planted 1 cm deep, the surface shouldn't dry out too much, and they grow down into the pot over time
Cuttings immediately go deeper into the pot, the moisture zone needs to be lower down for water uptake, but not cause rot.
Some people seal up a cutting in moist mix with a plastic bag over it, and leave it till it flushes.

865
Citrus General Discussion / Re: Forcing buds
« on: August 17, 2021, 05:22:53 PM »
Yes bending the top of the stock over, so that the inserted bud is closer to the highest point. The neighbouring stock buds will also activate, including on the bend. You need to brush off any stock shoots that pop out. Or you can nip out the bud eyes on the stock, so that the inserted bud gets the growth. This may help for lazy buds.

866
Citrus General Discussion / Re: Another fruiting rootstock tree
« on: August 17, 2021, 04:01:54 AM »
Seedlings that fruit at low node count are interesting in themselves.
The seedlings of Cuban Shaddock get big fairly fast, so thats an advantage for budding.

867
Citrus General Discussion / Re: germinate seeds in coco coir
« on: August 16, 2021, 06:45:38 PM »
I'm not aware of that. I don't alter my fertiliser or soil mix fertiliser depending on the rootstock seedlings, or the rootstock under the scion.
I have not noticed that any Poncirus have been killed outright.
Most Citrus fertilisers are general, not based on the different rootstocks. I am pretty sure Citrus growers apply Calcium for fruit production.
They may moderate it for groves on trifoliata rootstock ??
The chosen soil type that trifoliata rootstocks are in, might influence the total result of the applied calcium ?? pH controls nutrient availability.
What you say is still interesting, I might try some trifoliata seed in a lower Ca mix to see if they germinate any better.


868
Cold Hardy Citrus / Re: Grafting poncirus and flying dragon
« on: August 16, 2021, 07:43:08 AM »
I can't see any major problems with either combination,  FD on PT or PT on FD.
Virtually all Citrus scions are more vigorous than FD, and most more vigorous than PT. They are overall both successful rootstocks.
There are various strains of PT, some more, some less vigorous, so you could investigate those if you are concerned about rootstock / scion growth differences.
Also small flowered and large flowered strains.
The fast flowering trifoliate, as suggested above may be a good choice.
PT has great autumn colour, some nice oranges and reds. Some seedlings seem to colour and hold colour earlier and longer than others.
Also remember that as a bonus, if the scion dies, your customer will still end up with a Poncirus in the end.

869
Citrus General Discussion / Re: germinate seeds in coco coir
« on: August 16, 2021, 06:25:57 AM »
Personally I use 33 % coir and 67 % coarse sand for seed raising.

"And since it's poncirus I cannot add Ca, it doesn't tolerate it."
I'm not sure I would go as far as that, I don't think it's anything like an acid loving plant. I think it can handle normal pH range.

870
Citrus General Discussion / Re: germinate seeds in coco coir
« on: August 15, 2021, 06:03:04 PM »
Overall coir is regarded to have a good balance between air holding and water holding. It can be very high in K potassium, so it may be easier to source an amended product, with added Ca and Mg and or other trace elements or pH balanced to a desired range. Coir comes in various grades, fine to coarse, so not all at either end would be suitable for Citrus seeds.
Coir is now used in vegetable seedling punnets and plugs, for lettuce etc. These plants have fibrous shallow roots. Citrus seedlings develop via taproots, and this root can be well down into a pot, with not as much showing on top.
In any pot medium, the height of the pot is very important. In the case of Citrus, the taproot will be well into the saturated zone in a shallow pot, compared to what would happen in a tall pot with the exact same medium. In a tall pot the saturated zone will be lower down, and the air holding balance will actually increase.
Apart from air holding and water holding, you probably need to consider the rate of the media surface drying. This could depend on temperature, season, use of grow lights etc.

You could do some trials with supermarket lemon seeds etc, before you commit any more valuable seeds.

871
Citrus General Discussion / Re: HLB Help Looks Very Promising
« on: August 13, 2021, 09:06:37 PM »
Is HLB a citrus tree over population problem like covid19 is to over populated humans.
Covid 19 is not a human overpopulation problem,  it is a Chinese Lab problem.

There may be some parallels, Citrus is grown in monocultures, large areas of many states in several countries devoted to it.
Citrus labour workers move around between growing areas, including to other countries. USA is obvious,
Australia relied on International backpackers and now Pacific Islander or SE Asia workers as Covid has cut short term travel.
Citrus fruits are moved around worldwide to access markets at a higher price at an availability window.
This is despite the exact same fruit being available in the import country as the export country. i.e. Australia and USA Navel Oranges interchange.
Sometimes these seem heavily post harvest treated to be inedible.
Vast areas are devoted to the same few cultivars, lessening resistance to diseases.
Wild Citrus relatives or even Arboretum collections that may offer resistance genes are threatened.
Many unusual cultivars are held by hobbyists and backyard growers. These might be targeted for destruction to protect commercial growers.

Both HLB and Covid seem to have taken not only the opportunity of a vast population to infect, but the mechanisms of world trade and human movement in our societies to spread worldwide. Covid is spread by people, HLB spread by the insect vector, and also infected plants shipped between growing areas or States for horticulture nursery trade.

It seems that both Covid viruses and HLB were previously present in the environment as local problems before they were able to spread so widely.
Australia is only 200km or so from New Guinea, yet we very rarely get incursions of Malaria or Dengue fever into Australia, probably because our contact with PNG is far more limited than with other countries.( Also the mosquito vector is a factor). Similarly we don't get some horticulture insect pests etc moving across. Papaya fruit fly was a recent exception.
We didn't see the same escape of far more deadly diseases from Africa recently, maybe because it was less economically consequential for us to shut down travel to Africa.

The Overpopulation idea seems inaccurate to me, Both Covid and HLB have piggy backed aspects of our connected societies to spread widely.
The Chinese Lab idea, true or not, still relies on the same travel and trade systems to spread worldwide so rapidly.
Many people predicted the possibility of both human epidemics and Agriculture epidemics previously, based on our current practises.





872
Citrus General Discussion / Re: Scion v. Budwood v. Cutting
« on: August 12, 2021, 05:32:02 AM »
How about PT Poncirus trifoliata vs FD Flying Dragon ?? There were some anecdotal reports in Australia that Eureka lemon was ok on FD, but not recommended for PT.

873
Citrus General Discussion / Re: Help identifying plant
« on: August 10, 2021, 07:35:42 PM »
Yes it looks like an unripe fruit from the Annona family. Looks a bit like Sugar apple or Ilama ???.

874
Citrus General Discussion / Re: Yuzu Fingerlime cross
« on: July 31, 2021, 05:33:02 AM »
Well it's certainly looking like a Microcitrus hybrid now.

875
Citrus General Discussion / Re: Is Shunkokan polyembryonic ???
« on: July 15, 2021, 09:45:45 PM »
Thanks.

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