8 
BULLETIN 1482, V. 
DEFT. OF AGRICULTURE 
experimental orchards of the Hiley and Elberta peaches and the 
moderately heavy brown rot infection in the Elberta orchard. 
In each of the four years that this experimental work was under 
way there was a precipitation above the normal for the period from 
April to July, which undoubtedly facilitated the development in 
those years of brown rot and scab in the peach orchards of Georgia. 
In most cases the check plats in the experimental orchards showed 
heavy infections of these diseases. 
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Fig. 4. — Comparison of normal monthly precipitation and temperature at- 
Marshall ville, Ga., for 29 years, with precipitation and mean temperature 
by months for the year 1924. Points indicating normal data are connected 
by a solid line; those indicating data for 1924 by a broken line 
EXPERIMENTS ON SPRAYING AND DUSTING IN THE GEORGIA 
PEACH BELT 
In the seasons of 1921, 1922, 1923, and 1924 the extensive spraying 
and dusting experiments in the Georgia peach belt were performed in 
duplicate in orchards of Hiley and Elberta peaches, two of the varie- 
ties most commonly grown in the State. An effort was made to 
select for this purpose orchards which had suffered severely from 
attacks of curculio and brown rot in the previous season. In each 
year one orchard of each variety was chosen, the two orchards being 
at some distance from each other, so that a test of the various treat- 
ments would be afforded in two different localities. Each orchard 
was divided into sections, each including a convenient number of 
trees. In the central part of each section a certain number of trees 
(10, except in the case of a few small sections) were reserved as 
"record" trees, the fruit from which was harvested separately, 
including the fruit picked and that dropped from the tree during and 
just before the harvest season. Each record tree was designated by 
a white cloth band or tape encircling the tree and resting on the outer 
limbs. Each peach was cut open, examined, and recorded, so that 
the exact percentages of sound fruit from these trees and of fruit 
