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research to improve GRAFTING using auxins: plant rooting hormones



I have had quite a few inquires about improvement of
grafting success using plant rooting hormones applied
to scion and rootstock ends before joining. There seems
to be an improvement of callous which enhances joining.

I have taken the liberty of re-printing the article written by Dr. James N.
Cummins from the Pomona, Spring 1997

    at:    
    http://www.rooting-hormones.com/articles.htm


I have also located earlier works which I reprinted results

    at: 
    http://www.rooting-hormones.com/advliqd.htm

In summary:

Propagation by grafting of ornamental conifers is often unpredictable and
variable. IBA has been used to stimulate cell division at the graft site.
Grafts of Picea pungens 'Hoops' (blue spruce) on Picea abies rootstock were
improved: immerse the scion bases for three minutes in 200 ppm IBA before
joining Treated grafts were consistently improved by 13% over the controls
(Beeson, 1990).

Scion wood of carya illinoinensis (var. 'Desirable' pecan) were
successfully grafted onto the lateral roots of 'Van Deman' pecan seedling
root stock by Dry Dip the scion in 1% and 2% IBA in talc base. Shoot
survival for IBA treated grafts was 20% higher than the controls (Yates,
1992). Research is necessary to determine if liquid Immersion of the scion
will have similar success.

regards

Joel Kroin






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