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Messages - mikkel

Pages: [1] 2 3 ... 10
1
Citrus General Discussion / Re: What's wrong with my plant?
« on: June 11, 2019, 05:36:00 PM »
Not much different than before. But without leaves. It's dark now. I'll try it tomorrow.

2
Citrus General Discussion / Re: What's wrong with my plant?
« on: June 11, 2019, 05:16:22 PM »
Spraying did not thelp so far.Most leaves are brown and dead now Only two are bigger now but still chlorotic.
One branch is completely dead.

3
Thanks for report. I always wondered.

4
Citrus General Discussion / Re: House in greenhouse. Citrus garden
« on: June 02, 2019, 04:34:38 AM »

How cold does it get in winter inside and outside? I saw climate chart for your area and it is not so different from ours when only compared by average temperatures.
Heating the ground is best. Air heating is mostly a waste of energy. In my house I heat the walls without insulation on the outside. It saves 1/3 of the cost compared to before with standard radiator air heating. The best I can open windows without feeling the cold in winter.

5
Citrus General Discussion / Re: House in greenhouse. Citrus garden
« on: June 02, 2019, 04:01:08 AM »
How do you heat in winter? Do you use gas or oil?
I am really impressed a simple but efficient system!

6
Citrus General Discussion / Re: House in greenhouse. Citrus garden
« on: June 02, 2019, 03:49:12 AM »
Interesting that it is not overheated in summer. That was my main concern. Do have any special technic to prevent overheating or is it just the system by itself?

7
Citrus General Discussion / Re: House in greenhouse. Citrus garden
« on: June 02, 2019, 03:18:51 AM »
Very nice work! I am thinking about something like this since a long time. Congrats!
Here are some ideas I would like to contribute for everyone how is interested:

In Germany there is a company using a greenhouse around the house to heat it. The oven is placed outside in the greenhouse cause it is too warm otherwise. To prevent mold it is vented on top and walls are water vapour permeable. Water vapour will follow natural vapour pressure from inside to outside. No mold and rotting issues. Radon is discharged to the outside.
These houses have very low heating costs. But your area is definately colder in winter but might have more sun in winter?
https://www.bio-solar-haus.de/

This might be the same house in Sweden like in the link from lebmung
https://lantliv.com/lantliga-hem/vi-byggde-vart-hus-i-ett-glasvaxthus/

There is a very clever way to heat a greenhouse (and the house) in Nebraska made by Russ Finch.
This won`t work in Germany cause soil temperatures are colder due to missing snow cover in winter.

https://www.youtube.com/watch?v=ZD_3_gsgsnk

http://www.citrusinthesnow.com/

Is there a more detailed description of your house somewhere? I am interested in technical details like floor plans, ventilation,  air flow etc.
Would be really interesting!

8
Citrus General Discussion / Re: What's wrong with my plant?
« on: May 30, 2019, 01:54:09 AM »
What is urea low-b? Couldn`t find it with google. Did you spray the roots or the leaves?
Thank you!

9
Citrus General Discussion / Re: What's wrong with my plant?
« on: May 29, 2019, 03:00:26 PM »
What is the rootstock?

I cannot tell. Poncirus or Citrumelo I guess.

10
Citrus General Discussion / Re: What's wrong with my plant?
« on: May 29, 2019, 02:44:28 PM »
I will. Thank you for your help!

11
Citrus General Discussion / Re: What's wrong with my plant?
« on: May 29, 2019, 01:58:06 PM »
yes

12
Citrus General Discussion / Re: What's wrong with my plant?
« on: May 29, 2019, 01:33:49 PM »
it came from citrus centre.
But it was totally fine last year.

13
Citrus General Discussion / Re: What's wrong with my plant?
« on: May 29, 2019, 11:15:04 AM »


roots seem to be fine. no dead ones.

14
Citrus General Discussion / Re: What's wrong with my plant?
« on: May 29, 2019, 10:49:16 AM »
I thought of that too, but I didn't find any obvious damage. The roots seemed to be in order.
I`ll check again.

15
Citrus General Discussion / What's wrong with my plant?
« on: May 29, 2019, 09:58:04 AM »
This is a supposed US852. All new growth is yellowish and is barely growing. What is it?

A few weeks ago I repotted it and fertilized it. No reaction.
I haven't found any pests except a few brown spots.

16
Are you already doing cross pollination with it?

17
Do you bend the top to induce it to bloom?

18
Global Seed Vault on Svalbard has no Citrus in its catalog.

19
Citrus General Discussion / Re: Poncirus
« on: May 20, 2019, 09:02:28 AM »
The trifoliata that falls from my tree sprouts in clumps where the fruit fell in the fall, nothing will touch it. We have coons, possums & armadillos around & they never touch the poncirus.

This might be the advantage of Poncirus tastes.... when seen from the Poncirus point of view.

20
Citrus General Discussion / Re: Poncirus
« on: May 20, 2019, 08:40:55 AM »
Nice thought, I thought about it too.
I think pollinating flowers in the wild is a gamble. Fruits taste the same and initially have no advantage.
It would be easier to plant a hybrid aside. More fruit, more chance of distribution by animals, perhaps cross-pollination, but it still takes generations.
Malus sieversii is said to have been developed by bears through natural selection. If so, then it still took thousands of years.

There might be already hybrids in nature. I've never been to the USA and I can't judge it. But I got seedlings from the wild when it was still legal. It turned out that they were hybrids.

Just a thought game:
I wonder whether the typical Poncirus taste could be advantageous in nature? If animals prefer citrus fruits, as you observe, there should be seedlings around citrus plantations (especially some time ago when seedless varieties were not so common). Not necessarily much, but there should be. If there are none, the seeds seem to have some disadvantage. Maybe animals eat the seeds with them.


21
yesterday I saw a fruiting Eriobotrya at the cologne zoo. This winter was very warm (I have no idea how cold it was in Cologne) The specimen at Botanical Garden in Bonn is not the only one in that region this year.

22
Citrus General Discussion / Re: Eremomandarine
« on: May 08, 2019, 09:09:53 AM »
Where did you purchase it?

23
Cold Hardy Citrus / Re: N1triVoss
« on: May 04, 2019, 03:17:32 PM »
Recently I received seeds of N1tri from Ilya. Here are some seedlings
N1tri F2 by michaelbasso, on Flickr
N1tri F2 c by michaelbasso, on FlickrN1tri F2 b by michaelbasso, on Flickr

leaves are different from palnt to plant, mostly monofoliate but some are more or less trifoliate. Some are bi or trilobed like e.g. Passiflora leaves.

24
Cold Hardy Citrus / Re: Poncirus seed
« on: April 27, 2019, 03:00:33 AM »
I want some of the seeds from the parent that is almost thornless. Poncirus grows everywhere here and in groves. Like to look for mutations.

Why not take budwood for grafting? You could get seeds at home?
Would be interesting to see if there is a re thornless Poncirus in the wild. In the old forum was a guy who found one plant in the wild, but can`t find the post anymore.

25
 a genetic population with 220 hybrids between F. hindsii and F. crassfolia has been successfully bred and cultivated on a just 10 m2 horticultural shelf. Based on this population, a fine genetic map for fruit-related traits has been under construction in our lab. In addition, a juvenile period of eight months of F. hindsii is the shortest among the early flowering germplasms in the citrus taxa to our knowledge (Tong et al., 2009), suggesting the prospects of generating BC1, F2 or even introgression lines based on F. hindsii. More importantly, all previous transgenic F. hindsii lines carrying different sequences blossomed and bore fruits in their first or second year (Cao et al., 2015; Liu et al., 2017c; Zhang et al., 2009), suggesting that genetic modification does not disturb its intrinsic feature of short juvenility.

interesting. hindsii plants are easier accessable and crossings are easier reproducable than those with C.wakonai. But in case of of early flowering it might be still topped by C.wakonai. But in opposite to it hybrids still keep precocious flowering trait. As far as I know C.wakonai hybrids loose this trait in further generations.


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