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Messages - mikkel

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1
Cold Hardy Citrus / Re: Tetraploid Satsuma
« on: Today at 05:40:19 AM »
Maybe you already have seen it:

https://gardenscientist.wordpress.com/2013/09/09/inducing-polyploids/

I can send you a more detailed description that I received from Ethan Nielsen.
He uses Surflan instead of Oryzalin

2
Cold Hardy Citrus / Re: Favorite coldhardy rootstock
« on: February 05, 2025, 02:06:00 PM »
Vivergil is also selling FA5. Quite cheap. But these are rooted ones.

3
Cold Hardy Citrus / Re: F2 Citrandarin (X-639) winter hardiness trial
« on: February 04, 2025, 10:48:11 AM »
I did find 2 seedlings that were precocious, one flowered at 2 inches tall, and another flowered at 6 inches tall. The taller one had unusual leaves so I cloned it to test it some more. It seemed to have slightly hardier new growth than some of the other Yuzu seedlings.

Do you have a photo of both? I found also some precocious flowering seedlings. One was able to fruit in its 3 rd year .

4
just a short note, my small citrus also suffered greatly from the slugs last year. I  then had very good success with nematodes to decimate the slugs. just 1 week later almost all the slugs had disappeared. I only found new slug offspring again in the fall. whether the effect lasts this year remains to be seen.

5
Cold Hardy Citrus / Re: Cold Hardy Pomegranate
« on: January 27, 2025, 11:44:20 AM »
I have a tree that has now borne fruit for the first time in 4 or 5 years. It is now 2 m high and 1-1.5 m wide.
Unfortunately I have forgotten the variety, but it could also be Salavatski, which was included in the order at the time.

6
Hello Rei, thank you for your report and welcome to the forum. You've already gained a lot of experience, that's great! haven't you been active in any forums yet?

Concerning the Yuzu Citrumelo discussion:
In my opinion, Staruzu is the better choice than Yuzmelo from Zdenek (which you can get from e.g. Adavo, for example)
Yuzmelo Zdenek is quite hardy, Staruzu should be similar, but there is hardly any experience yet. Yuzmelo has already survived frost while in pot, not very deep frost but sufficient. The leaves also turn slightly reddish in winter temperatures, as if hinting at autumn coloration. However, the coloration disappears completely in spring. There is no real leaf litter as with Poncirus.
I've had one fruit on Yuzmelo (Zdenek) that wasn't fully ripe and tasted distinctly of Poncirus hybrids, not good in my eyes, perhaps they are different when they are fully ripe.

These were my notes, (but it wasn`t fully ripe):

Initially, immediately after cutting, the taste is typical of Poncirushybrids, a coniferous aroma can be clearly tasted, but no bitterness. The fruit is simply sour with secondary aromas.
After half a day it only tastes sour and like unripe grapefruit.
Definitely not a fruit for eating raw.

Staruzu was a fruit that I found quite similar to a lemon, with a pleasant lemon scent, but no secondary aromas, not even resin, just a slight bitterness that didn't bother me. My children simply called it a lemon.

Staruzu , top center



7
Cold Hardy Citrus / Re: Hong Kong kumquat
« on: January 23, 2025, 02:03:05 PM »
In Europe there are 2 types, one with thorns and one without. Bernhard Voss told me that the one with thorns is the diploid, the one without thorns is the tetraploid.

This is a tetraploid (in poor condition)


8
Cold Hardy Citrus / Re: Citrangequat 19-15-7
« on: January 23, 2025, 07:57:18 AM »
augusta is a seedling from around the turn of the millennium

9
translation

Hi, I am a new Italian user who collects only potted varieties of lemons.....I have about thirty , all different varieties. Could you please indicate me how I can buy from UCR/CPP....i would be very interested in the 9 libre variety you talk about in the post.
In any case I am also interested in exchanging scions with forum users...thank you Francesco

10
Cold Hardy Citrus / Re: The R.E.S. Method - Fruit From Seed in 1-2 Years
« on: January 20, 2025, 04:29:47 PM »
I have seen the breeding program in Japan using larger trees, with individual limbs topworked with buds of individual hybrids, and then growing these as single stalks.

in South Korea:




11
Cold Hardy Citrus / Re: Citrangor 43728 - INIA Uruguay
« on: January 20, 2025, 05:17:29 AM »
I could hardly find anything about Citrangors in general, and nothing at all about individual types. I was able to find a total of 4 different types or names. Maybe  someone know them or has some experience.
Citrangors are certainly not the breakthrough, then they would be better known. I am particularly interested in how the backcrossing affects the fruits. ID Tools writes about sour fruits for the untitled variety. That would at least be better than the citrange fruits I know.
Such a tendency would be helpful for further crossing work.

12
Cold Hardy Citrus / Re: Citrangor 43728 - INIA Uruguay
« on: January 19, 2025, 04:37:14 PM »
Do you know anything specific about 43728?

13
Cold Hardy Citrus / Re: Citrangor 43728 - INIA Uruguay
« on: January 19, 2025, 05:58:57 AM »
So far it is only the name, Citrangor is a Citange x Orange backcross at INRA. This could be interesting, at least in theory...

14
Cold Hardy Citrus / Citrangor 43728 - INIA Uruguay
« on: January 17, 2025, 10:06:00 AM »

When searching for Citrangor 43728 I came across the INIA in Uruguay, apparently a local counterpart to Riverside

Unfortunately there is no other source for Citrangor 43728. Does anyone know it?

And does anyone know INIA?


https://www.inia.org.uy/investigacion/programas/hortifruticultura/germo.htm#varios

16
Cold Hardy Citrus / Re: Cold hardy lemons
« on: January 16, 2025, 09:33:57 AM »
of course, it is simply common dirt of an untidy writer... :)

17
Cold Hardy Citrus / Re: Cold hardy lemons
« on: January 16, 2025, 05:14:49 AM »
It is a pitty that plant exchange between Europe and US is close to impossible. It should, however, be possible to legally exchange pollen. I think we should use that much more in future.

Unfortunately, this is also no longer legal.

I have a Violetta, which bears reliably even as a small plant, is undemanding and quite acceptable as a fruit. The seeds give many zygote seedlings.

I got some interesting fruiting Violetta seedlings from Bernhard Voss. One is almost a pomelo-like type. Large, almost huge fruits and also hardy in South Tyrol. The other is more like a grapefruit, but I can't say much about it yet.

18
Cold Hardy Citrus / Re: Cold hardy lemons
« on: January 15, 2025, 07:40:13 PM »
I get the sense that Europe has more variety here.
it just seems that way. Seen from Europe, it feels exactly the other way round :)  There are no specifically european varieties, especially not in commercial trade.  I would even say that all European varieties are actually from the US.
At least in the Riverside collection you can find everything that is available in Europe.

19
I had the impression that I P pollen almost always resulted in zygote seedlings. I haven't really verified and cross-checked this, but I have noticed anecdotally that my pollinations with I P have never produced nucellar seedlings. Even with varieties that are said to be nucellar.
As I said, this is only anecdotal and not verified, but it would fit your observation

20
Cold Hardy Citrus / Re: Cold hardy lemons
« on: January 15, 2025, 05:54:28 PM »
Hello Till,

just some random comments from my side :)

I have Limequat Tavares x Yuzu two seedlings. They are only 30cm high so far. Let's hope they will taste good. I have also Red Fingerlime x Ichang Papeda. The seedlings are only one year old but grow well so far. They look very similar to pure Fingerlime seedlings.

I once had a Faustrime x I P seedling that looked like a Faustrime, but with a leaflet like I P.

Ichang Papeda is very sour but also bitter. When bitterness is not dominantly inherited (there seems to be hope) than a Lemon substitute is not far from possible on the basis of Ichang Papeda.

There is at least one I P which is not bitter, no, actually 2; IVIA is the better known, then a seedling here in Germany, in the Rhineland which is also seedless as long as it is not cross-pollinated.
Has somebody tasted Citrumelo x Yuzu? There is such a cross in Frensh nurseries and is much praised for its taste. And Ilya has also produced such crosses. Perhaps a good Lemon substitute already exists.

There are different ones, the one at Adavo, a hybrid from Zdenek Cernoch, is not so tasty. I didn't like it, but it is very hardy.

21
Citrus General Discussion / Re: vaniglia sanguingo fruit
« on: January 07, 2025, 02:40:55 AM »
yes that is of course correct, only from the simplified point of view that it is a single recessive gene that behaves in a mendelian manner, there is a chance of expression. ultimately, it can only be tested.

22
Citrus General Discussion / Re: vaniglia sanguingo fruit
« on: January 06, 2025, 05:05:42 PM »
But hybridising two of these hybrids with the recessive gene could (with luck) result in a sweet hybrid, also with Poncirus in the pedigree.

23
Cold Hardy Citrus / Re: Citrangequat 19-15-7
« on: January 02, 2025, 04:05:03 PM »
As it is a seedling it is probably something new. Only if it was a nucellar seedling and the tree in Winterhaven was 19-15-7, it could be the same.
Anyone who will order it?

24
Cold Hardy Citrus / Re: Citrangequat 19-15-7
« on: December 24, 2024, 02:30:39 AM »
Augusta Citrangequat came as seedling from Winterhaven.
This is what I found about it:

https://citrusgrowersv2.proboards.com/thread/1030/augusta-citrangequat-info

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