I.
1. Spraying Apple Trees Before as Compared with
._ Spraying After Blooming.
By H. GARMAN, Entomologist and Botanist.
With a view to showing the effect of arsenate of lead as com-
pared with Paris green in checking the injuries of the codling moth,
and to show the effectiveness of spraying with these mixtures when
the trees are in full bloom, as compared with spraying after the
petals have fallen, the experiments described below were carried
out in 1907.in the apple orchard owned by Mr. G. C. Scheible, of
· Tip-Top, Hardin County, Kentucky.
ml The orchard occupies about_ twenty-Eve acres of land, and con-
m_ · sists in great part of Ben Davis, Rome Beauty, York Imperial and
Maiden’s Blush. The large number of thrifty trees of the same
variety and age in the orchard renders it particularly well suited
for experimental work of this sort, and with the care bestowed on
thespraying by Mr. Seheible and his men, and again in harvesting
the fruit so that it could bc examined carefully, it was possible to
get data of some interest and value. The season was, however, a
peculiar one, and spraying did not show anywhere in the State
the` decided improvement in quality of the fruit that it generally
fry does. After the blossoms expanded in the spring, a cold spell of
weather, with several frosts, and some snow at times, kept them
in a stationary condition for weeks. At one time the partly ex-
panded blossoms could be found adhering to each other in com-
pact clumps as a result of the freezing. It seemed then that no
crop would set. Even after the first applications were made, it
appeared probable that every young apple would fall, as many of
them did fall later. The crop was light as a consequence, and this
l Of was especially true of the Ben Davis, which commonly bears some
lhig fruit when other varieties fail completely. The only variety that
set a full crop was York Imperial, the trees of which were loaded
ieir with very fine smooth apples.
The apples were picked and examined September 12th. Fol-
lowing is the plan of the experiments, together with details of
results: