Citrus Growers Forum Index Citrus Growers Forum

This is the read-only version of the Citrus Growers Forum.

Breaking news: the Citrus Growers Forum is reborn from its ashes!

Citrus Growers v2.0

new Papua New Guinea Microcitrus- Citrus wakonai
Goto Previous  1, 2, 3, 4  Next  
Citrus Growers Forum Index du Forum -> Citrus news
Author Message
Millet
Citruholic
Citruholic


Joined: 13 Nov 2005
Posts: 6657
Location: Colorado

Posted: Thu 16 Jan, 2014 2:18 am

In reality this entire discussion on members of this forum going into PNG and successfully, legally or illegally, obtaining the wanted plant material, then getting it back so that members of this forum can grow the material is either an entertaining exercise for discussion, or hallucinatory. - Millet

NOTE: The USDA & and other Agricultural authorities check the content of this forum. On several occasions I have been contacted by them inquiring about members, especially in relation to what they have written in their posts.
Back to top
Radoslav
Moderator
Moderator


Joined: 03 May 2008
Posts: 453
Location: Slovak Republic

Posted: Thu 16 Jan, 2014 4:02 am

citrange wrote:
As far as I can ascertain, there are no restrictions on importing citrus seeds into the EU.
Sylvain needs to check whether seed collection and export from PNG is permitted. Certainly it has been allowed in the past. In fact, it is generally accepted that 'ex situ' propagation of rare species is a good idea - so long as it does not adversely affect native populations.


If we talk about import from "third countries" (countries outside of EU according to EU legislation) I am 100 percent sure, that there is no restriction of import any amount of citrus seeds to EU, you can also import fruits officially, but in that case, you need phyto certificate, in case of seeds there are no certificate needed.
And if it really flowers in one year - there is no need to collect cuttings or budwood - which are prohibited to import.

For those who are interested in case of citruses (import to EU):

ANNEX Ill
Part A

PLANTS, PLANT PRODUCTS AND OTHER OBJECTS THE INTRODUCTION OF WHICH SHALL BE PROHIBITED IN ALL MEMBER STATES

16. Plants of Citrus L., Fortunella, Swingle, and
Poncirus Raf., and their hybrids, other than fruit and seeds
if the country of origin is : Third countries (countries outside the EU)
http://aei.pitt.edu/12605/1/12605.pdf
Back to top
Sylvain
Site Admin
Site Admin


Joined: 16 Nov 2007
Posts: 790
Location: Bergerac, France.

Posted: Thu 16 Jan, 2014 10:51 am

Keep cool Millet. It is not as hard as you think.
For the Citropsis mirabilis I contacted INRA That is managing the French germplasms collection and they said they will accept with pleasure any germplasm they don't have in their collection and take care of the work to verify and take off any disease. They even told me were I must send the germplasm.
All collections of the world work this way. Even in USA it works this way. Didn't you notice in the collections: Seeds sent by ... Budwood given by...

The Issues don't come from a new species brought back from the wild (witch is a very good thing) but from people that exchange between growing regions.

For example people sending citrus from Guadeloupe or Martinique (France) where they have greening to metropolitan France is a very dangerous act that is done every day without crossing a border. Evil or Very Mad
Back to top
bussone
Citruholic
Citruholic


Joined: 30 Apr 2013
Posts: 68
Location: Philadelphia, PA, USA

Posted: Thu 16 Jan, 2014 2:28 pm

yuzuquat wrote:
Just to make whole enterprise a lot more difficult could we drop off in China and get some Poncirus polyandra seed as well.



Is there a suspicion the Chinese researchers are hoarding seed and wouldn't share?
Back to top
citrange
Site Admin
Site Admin


Joined: 24 Nov 2005
Posts: 589
Location: UK - 15 miles west of London

Posted: Thu 16 Jan, 2014 3:55 pm

Quote:
Is there a suspicion the Chinese researchers are hoarding seed and wouldn't share?

It's not really fair to say that yet when there are so few plants even in China.
From the Kunming Institute of Botany:
"At present, there is only one cultivated plant near the village of the origin place, eight in Kunming Institute of Botany, Chinese Academy and Science (KIB), and ten in the plantation of Tea and Mulberry Station of Fumin Agriculture Bureau.
KIB began the research of ex situ conservation of P. polyandra in 1993. Currently, Kunming Botanical Garden (KBG) has successfully conserved eight P. polyandra plants. Five plants have bloomed since 2008 and bore fruit in 2010. More than 30 fruits were harvested with only about 200 seeds in 2012. It is expected that the cultivation of the nursery-grown plants in 2013 for re-introduction and population reconstruction of P. polyandra."
Back to top
yuzuquat
Citruholic
Citruholic


Joined: 01 Sep 2013
Posts: 114
Location: manchester, england

Posted: Thu 16 Jan, 2014 7:19 pm

Do the math if they have 13 plants of flowering size as reported.

If each plant produces only 10 functional flowers and thus 10 fruits, each fruit with 30 or more seeds. In 2013 13 x10 x30 is 3900seeds.

Even if trying to rebuild a wild population that is still a lot of seed? Surely for safety of the species they must be sending some to other collections?
Back to top
bussone
Citruholic
Citruholic


Joined: 30 Apr 2013
Posts: 68
Location: Philadelphia, PA, USA

Posted: Mon 20 Jan, 2014 8:06 pm

yuzuquat wrote:
Do the math if they have 13 plants of flowering size as reported.

If each plant produces only 10 functional flowers and thus 10 fruits, each fruit with 30 or more seeds. In 2013 13 x10 x30 is 3900seeds.

Even if trying to rebuild a wild population that is still a lot of seed? Surely for safety of the species they must be sending some to other collections?


Digging through the listings, I think the UF and USDA Riverside collections might have one each. They certainly acknowledge the species.
Back to top
Laaz
Site Owner
Site Owner


Joined: 12 Nov 2005
Posts: 5636
Location: Dorchester County, South Carolina

Posted: Tue 21 Jan, 2014 12:26 am

As far as I know, there is no restriction on sending seeds. You can not however send plant parts.

_________________
Wal-Mart a great place to buy cheap plastic crap ! http://walmartwatch.com/ ...

Back to top
Sylvain
Site Admin
Site Admin


Joined: 16 Nov 2007
Posts: 790
Location: Bergerac, France.

Posted: Fri 14 Mar, 2014 7:25 pm

Who could get information on Citrus medica var. papuan?

Thanks.
Back to top
pagnr
Citrus Guru
Citrus Guru


Joined: 23 Aug 2008
Posts: 407
Location: Australia

Posted: Fri 14 Mar, 2014 7:51 pm

Try this database, it gives rough locations for the other species of interest
http://www.pngplants.org/

http://www.pngplants.org/PNGdatabase

http://www.pngplants.org/search.htm

http://www.pngplants.org/cgi-bin/RBG?form=PNG%2Fpng&laeno=&section=all&fam=&genus=citrus&species=&otherran=&otherval=&collname_tab=&collno=&datecol_1=&datecol_2=&datecol_3=&date2_1=&date2_2=&date2_3=&textdate%3A1=&country=&state=&subdiv=&loadloc=&sitedesc=&plantdes=&originat=&recordba=&donat2_tab=

If you search Citrus, then tick the box to select on the results, click more info, you get detailed collection info, inc lat + long for some

Looks like wakonai is listed as warburgiana on Goodenough Is
Back to top
citrange
Site Admin
Site Admin


Joined: 24 Nov 2005
Posts: 589
Location: UK - 15 miles west of London

Posted: Fri 14 Mar, 2014 9:03 pm

The authors of the paper on C. wakonai discuss the differences between it and C. warburgiana - which is found about 70km distant across the water. They observe several differences, the most notable being the fruit shape which is globose in warburgiana but ellipsoid in wakonai. They also note differences from C. garrawayi which is geographically considerably more distant.
The paper is available from my website at http://www.homecitrusgrowers.co.uk/australiannativecitrus/CWakonai%20pdfs/Wakonai.pdf

I have been exchanging a few emails with David Mabberley, one time head of Sydney Botanic Garden and author of several papers on Australian citrus and their taxonomy. He writes
Quote:
As to your question, I am not 100% convinced that C. wakonai is distinct from C. warburgiana, which is recorded from nearby.


Mike/Citrange
Back to top
pagnr
Citrus Guru
Citrus Guru


Joined: 23 Aug 2008
Posts: 407
Location: Australia

Posted: Fri 14 Mar, 2014 9:54 pm

The data base doesn't list wakonai, but records a Citrus as warburgiana on Goodenough Is.
Either way, the former Microcitrus on Goodenough Island is likely to be wakonai as we are refering to it, as it was formerly regarded as garrawayi, and may have been recorded as warburgiana by the survey team.
It is possible that warburgiana and wakonai types both occur on Goodenough Is, but that seems unlikely.

If Prof Mabberly doesnt regard Poncirus or Microcitrus as distinct from Citrus in his reclassification, i doubt he would find much to differ in the obviously related PNG species Wink Wink
Back to top
Sylvain
Site Admin
Site Admin


Joined: 16 Nov 2007
Posts: 790
Location: Bergerac, France.

Posted: Sat 15 Mar, 2014 9:24 pm

Quote:
Try this database, it gives rough locations for the other species of interest .

I've been working for months on this database! Smile

There is 'Citrus medica var. acida' with no data.

UCR has Papuan citron (PI539430) but no data.
Crying or Very sad
Back to top
pagnr
Citrus Guru
Citrus Guru


Joined: 23 Aug 2008
Posts: 407
Location: Australia

Posted: Sat 15 Mar, 2014 10:19 pm

Papuan Citron appears in rootstock trials in Australia, but doesnt seem to be in arboretums( but listings getting old )
here is a UCR page
http://www.citrusvariety.ucr.edu/citrus/papuan.html
Back to top
Sylvain
Site Admin
Site Admin


Joined: 16 Nov 2007
Posts: 790
Location: Bergerac, France.

Posted: Sun 16 Mar, 2014 12:43 am

Yes but no data on the place where it grows... Sad
Back to top
Citrus Growers Forum Index du Forum -> Citrus news
Goto Previous  1, 2, 3, 4  Next
Page 3 of 4
Informations
Qui est en ligne ? Our users have posted a total of 66068 messages
We have 3235 registered members on this websites
Most users ever online was 70 on Tue 30 Oct, 2012 10:12 am

Powered by phpBB © 2001, 2005 phpBB Group