CONTROL OF PEACH DISEASES IN GEORGIA 
11 
orchard, and contained in all 70 trees. An effort was made to place 
all plats at equal distance from the hibernating quarters of the 
curculio. (Fig. 6.) 
The applications of dust were made with large power dusting 
machines and the liquid was applied with power sprayers, developing 
from 250 to 275 pounds pressure. The spraying and dusting were 
done only when favorable weather conditions prevailed. These and 
all other operations in the present research were performed by the 
parties named as writers of this bulletin. 
In Tables 4,5, and 6 the results of the experiments in spraying and 
dusting conducted on the Hiley peach trees in the season of 1922 are 
Fig. 6.— Diagram of orchard of Hiley peaches used for experiments 
in the season of 1922. Each tree is represented by a circle, the 
solid black circles representing record trees 
given in terms of percentages. Table 4 presents the results obtained 
from the examination of the fruit from the record trees of each plat 
at harvest time, besides which the last two columns give the per- 
centages of merchantable and cull fruit harvested from those trees, 
as determined by grading the fruit before it was cut open for examina- 
tion. In Table 5 are the numbers of fruit that dropped to the ground 
from the record trees in the different plats from shortly after the 
pollination season until the fruit was ready to be harvested, and the 
percentage of curculio-wormy fruit in each. Table 6 gives the com- 
mercial results of fruit from all trees in each plat. 
