26 BULLETIN 1482, U. S. DEPT. OF AGRICULTURE 
In the Hiley orchard infection by scab was heavier than is usual 
in central Georgia, as indicated by an infection of 71.5 per cent in 
the check plat. Of the fruit harvested from the check plat in the 
Hiley orchard 16.1 per cent had brown rot. This moderately light 
infection was to be expected because of the light infestation of the 
curculio. Such an infestation is generally reflected in the degree of 
brown rot, as there is a close interrelation between the injuries 
caused by the two pests. 
Because of the very light infestation of the curculio at the beginning 
of the season, no data of value were obtained on the control of the 
insect in the Hiley orchard. According to Table 16 the " drops" 
from Plat II, which did not receive the early treatment with arsenate 
of lead, suffered an infestation of 2.1 per cent. A curculio infestation 
of 1.5 per cent was found in the " drops" from Plat I, which received 
the first arsenical treatment as the petals fell. There was little 
difference between the curculio infestations of the " drops" from the 
plats receiving the spray and those from the plats treated with dust. 
The " drops" from Plat I, sprayed with liquid, suffered a curculio 
infestation of 1.5 per cent, whereas those from the two plats receiving 
dust suffered infestations of 1.4 and 3.2 per cent, respectively. 
Colloidal sulphur gave good control of brown rot and scab, as 
indicated by 0.7 per cent brown rot and 1.7 per cent scab (Table 15, 
Plat II). This material in combination with arsenate of lead, 
without lime, produced very severe burning of the foliage, resulting 
in almost complete defoliation shortly after the harvest. When 
lime is used with the colloidal sulphur in combination with arsenate 
of lead, the burning is materially reduced. 
Plat III, which received the recommended dust schedule, suffered 
a curculio infestation of 4.6 per cent, a brown-rot infection of 1.6 
per cent, and a scab infection of 9.1 per cent. Plat I, which received 
the recommended spray schedule, had a curculio infestation of 
3.3 per cent, a brown-rot infection of 2.3 per cent, and a scab infection 
of 8.6 per cent. Judging from the data of other years, this differ- 
ence would undoubtedly have been much greater had the curculio 
infestation and brown-rot infection been heavy. 
Plat IV, which was given a dusting after every rain until the peach 
stones began to harden, and which was finally sprayed, manifested 
about the same control of the curculio as did Plat I, which received 
the regular spray treatments. 
It is seen from Table 17 that Plat IV, which received a treatment 
of both dust and liquid, and Plat I, which received the recommended 
treatmert with spray, bore more merchantable fruit per tree than 
the other plats. 
Tables 18, 19, and 20 present, in percentages, the results of the 
experiments in spraying and dusting on the Elberta peaches in 1924. 
Table 18 presents the data for the fruit harvested from the record 
trees, Table 19 the percentages of curculio-infested fruit that dropped 
to the ground from the record trees in the several plats before 
harvest, and Table 20 the commercial results in merchantable and 
cull fruit from all the trees in each plat. The apparent discrepancies 
between " sound fruit" and " merchantable fruit" in Table 18 were 
due to the fact that some peaches containing a few scab spots were 
graded as merchantable fruit. 
