t the success of walnut grafting is greater
when the grafts are set just after the leaves are full grown but no such
data is available for hickories. The use of paper bags or other shading
device over the scion is advocated by Morris(13), MacDaniels(11),
Shelton(20) and others.

Propagation by Budding

Patch budding is now almost universally used by commercial nurserymen in
the propagation of hickories and pecans. Patches are usually cut with a
double-bladed knife although some use the rectangular Jones
patch-budding tool. The "plate" or "skin" bud is also used to some
extent. The thick bark of hickories and pecans discourages the use of
the shield or "T" bud.

Budding is usually done in late summer with mature buds of the season
growth which remain dormant until the following spring. Occasionally
dormant budwood taken in winter is held in cold storage until the bark
of the stock slips in the spring. These spring-set buds are forced the
same season by cutting the stocks back shortly after setting.
Patch-budding is described by Reed(15) and by Rosborough et al(18).
Reed(15) mentioned that it may be advisable to make the cuts in the
stock from one to three weeks before the bark is removed so that the
healing process may be under way at the time the bud patch is inserted.

Storage and Handling of Scions and Budwood.

Shelton(20) reported an easy and unique method of keeping scions moist
by storing in a closed container with a small amount of sodium sulphate
(Glauber's salt). Slightly moist peat moss is an excellent packing
material. Brison(4) reported that a temperature of 32 deg. F to 38 deg. F in
storage is satisfactory for keeping the buds dormant, and that a few
days from 80 deg. F to 85 deg. F will stimulate cambial activity so that the
patches will "slip" easily when cut. Scionwood is sometimes dipped in
wax, paraffin, or plastic resin before storing in order to prevent loss
of moisture and guard against pathogenic organisms.

Waxes and Wound Dressings

Sitton(19) used a large number of variously formulated waxes on pecan
and found that the most successful from the standpoint of graft survival
was one composed of 10 parts rosin, 2 parts beeswax, and 1 part filler
such as kieselguhr, talc, or aluminum powder. Under Louisiana conditions
a light-colored wax was preferable to dark colored one. Asphalt
emulsions were not satisfactory.

Rootstocks and Interstocks for Hickories

Reed(16) summarized the ro