A good deal is said about _pruning for fruit_. It is doubtful,
however, whether unfruitful pear-trees can be made more fruitful by
the pruning recommended for this purpose. When barrenness is caused
by the production of wood and foliage at the expense of fruit-buds,
as possibly sometimes happens, summer-pruning may check the
over-production of growth and cause flower-buds to form. There seems
to be no definite experiments to prove this theory in America, nor do
pear-growers generally practice this kind of pruning which has been
preached so long and so often. To follow the rules in this operation,
summer-pruning should be done when the growth for the season has
nearly ceased. If done earlier, the shoots cut back start again and
the pruning has been useless. If done too late, there is too little
time for the production of fruit-buds. In the unequable climate of
this country it is most difficult to know when to prune in the summer
to meet the requirements of the theory urged so strongly by European
pomologists. A weighty objection to summer-pruning in America is that
the wounds might and probably would become centers of infection for
blight.
There is no attempt to give a full discussion of pruning in this
text. Such details as making the cut, covering the wounds, pruning
paraphernalia, filling cavities and the amount to prune, belong to
texts on pruning. Perhaps two minor details important in growing
pears should be mentioned. Suckers or water-sprouts form so freely
on branches of pears that they often seriously devitalize the tree,
and usually are centers of blight. They should therefore be removed
promptly whenever and wherever found. The time to prune the pear is
important. If the work is done too early in the winter, injury may
result to the tissues near the wound from cold or from checking. If
done late in the spring when sap is flowing, the wound becomes wet and
sticky and is a suitable place for the growth of fungi and the blight
bacterium.
The pear is as easily grafted as any other pome, and the operation
is more certain and more often desirable than with any of the
stone-fruits. Almost any method of grafting used with orchard fruits
is successful with the pear. But the pear is not often grafted in this
State after the tree has been set in the orchard. The great objection
is that the vigorous growth made by grafts is nearly always nipped by
blight. Possibly the lack of affinity between different varieties is
more pronounced than with other pomes. The common European varieties
cannot be inter-worked without experimental knowledge of how one
variety will grow on another, and it is almost impossible to intergraft
common varieties with the oriental hybrids. The temptation is strong in
this State to graft such sorts as Bartlett and Seckel on Kieffer. This
combination is seldom successful; nor, as a rule, can other European
pears be grafted on Kieffer, although some growers have succeeded
fairly well in growing Seckel on Kieffer.
Public-domain text, read in full here on John Shaqi.
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