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RE: Stenting: rooting and grafting at the same time

> -----Original Message-----
> From: rosenlund [r*@transport.com]
> Sent: Tuesday, September 01, 1998 2:47 AM
> To: Rose-List
> Subject: RE: Stenting: rooting and grafting at the same time
> Joel.
> Could you explain this, "can be better than" please.
> > When a suitable rootstock is used the
> >root formation after stenting can be better
> >than those produced by conventional rooting.
> Sincerely,
> Carleen Rosenlund of Rainier, Oregon -USDA-8
> Sweetbriar - Keeper of Sheep & Old Roses
>
Dear Carleen

Two of the factors are below:

ELIMINATE WILD SUCKERING: When the rootstock is initially without buds,
suckering can only occur when this rootstock forms adventitious shoots from
its newly formed roots. Van de Pol (1980) found to diminish wild suckering
it is necessary to eliminate buds on the rootstock. Using Rosa chinensis
'Indica Major' as a rootstock the best results were obtained with mature
internodes 6- 8 mm in diameter.

ELIMINATE BLACK ROT: During the winter pay extra attention to the degree of
ripeness of the plant material. At this time problems like black rot of the
rootstock caused by Fusarium oxysporum var. redolens and root formation by
the scion may occur. It is preferable to use a lower hormone concentration
of a fresh rooting solution of  in this period. Pretreatment of the
rootstocks by cooling can be a way to prevent black rot as well as root
formation by the scion.

regards
Joel Kroin
jkroin@hortus.com
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