North American Fruit Explorers mailing list at ibiblio

[David Noel <davidn@AOI.com.au>]

-- And of course if you can succeed once with air-layering a particular
pawpaw variety, you should be able to further propagate it from root
cuttings from the resulting roots....

David Noel
2000 Jun 29
===============================

>Kirk:
>    Has anyone done anything there with layering pawpaw?  I learned an
>interesting version of air layering at the NCGR in Corvallis, used for
>Corylus, that might work on pawpaw.
>-Lon Rombough
>----------
>>From: "Kirk W. Pomper" <kpomper@dcr.net>
>>To: nafex@egroups.com
>>Subject: Re:[nafex] Pawpaw
>>Date: Wed, Jun 28, 2000, 8:48 AM
>>
>
>>
>>I thought I would summarize some of the work that has been done here at
>>Kentucky State University by Cindy Finneseth and Desmond Layne, in
>>cooperation with Robert Geneve at the University of Kentucky on
>>propagating pawpaw (Asimina triloba) via cuttings:
>>
>>1) Semi-hardwood cuttings
>>
>>Semi-hardwood cuttings were collected from mature trees (5 years old,
>>flowering) at the KSU Research Farm; more than 26 genetically different
>>trees were used in the study. The cuttings were taken from actively
>>growing branches from June until terminal bud set in early August. IBA
>>was used as the rooting treatment, with quick dip solutions at
>>concentrations of 0, 5000, and 10,000 ppm. After auxin application, the
>>cuttings were stuck in flats filled with a 1:1 moistened mixture of
>>Promix and perlite.  Flats were placed on raised benches in a
>>poly-covered greenhouse and a soil temperature was maintained at 80 F
>>using a hot water bottom-heated system.  Continual intermittent mist was
>>provided for 5 seconds every 5 minutes. Only 1 of 5100 cuttings from
>>mature tree
>>sources formed an adventitious root.
>>
>>2) Root Cuttings
>>
>>We have taken root cuttings from dormant trees in February and placed
>>the
>>cuttings 5 cm deep, in flats filled with a 1:1 mixture of perlite and
>>vermiculite.  No shoots formed on root pieces less than 5 mm in diameter
>>
>>over the 24 week period; however, buds and/or shoots were present on 56%
>>of
>>the root pieces with a diameter of greater 5 mm within 16 weeks. Healthy
>>plants can be clonally propagated via root cuttings that produce shoots;
>>however, we have had trouble with root cuttings rotting in the flats and
>>killing the plants. The clonal propagation of pawpaw rootstock via root
>>cuttings does look promising. Unfortunately, virtually all currently
>>available pawpaw cultivars have been propagated via grafting or budding
>>and are no longer on their own roots.
>>
>>Kirk Pomper
>>--
>>Kirk W. Pomper, Ph.D.
>>Principal Investigator of Horticulture
>>Kentucky State University
>>129 Atwood Research Facility
>>Frankfort, KY 40601
>>
>>Phone: 502-227-5942
>>Fax:     502-227-6381
>>Email: kpomper@dcr.net                  Check out our web site at:
>>or kpomper@gwmail.kysu.edu             http://www.pawpaw.kysu.edu
>>
>>
>>
>>
>>--
>>Kirk W. Pomper, Ph.D.
>>Principal Investigator of Horticulture
>>Kentucky State University
>>129 Atwood Research Facility
>>Frankfort, KY 40601
>>
>>Phone: 502-227-5942
>>Fax:     502-227-6381
>>Email: kpomper@dcr.net                  Check out our web site at:
>>or kpomper@gwmail.kysu.edu             http://www.pawpaw.kysu.edu

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