CONTROL OF PEACH DISEASES IN GEORGIA 31 
even when lime was added the combination has a tendency to burn 
more than properly prepared self-boiled lime-sulphur. 
The results gained from three applications of self-boiled lime- 
sulphur were not enough better than those from the usual two appli- 
cations to warrant the extra application. 
In each of the four years of the experiments the spray was more 
effective than the dust against the curculio, brown rot, and scab. 
Although the schedule which combined dust and spray, and pro- 
vided for an application of dust after each rain until the hardening 
of the peach stones, was more effective against the curculio than the 
schedule providing for applications of dust at specified times, it was 
not so effective as the schedule for applications of spray at specified 
times. 
Dust containing 10 per cent of arsenate of lead gave no better 
control of the curculio than did the dust containing only 5 per cent, 
and resulted in more burning of the foliage. 
Dust containing only 50 per cent of sulphur did not control brown 
rot and scab so well as one containing 80 per cent. 
A dust composed of 80 per cent of sulphur and 20 per cent of lime, 
when applied 7 to 10 days before harvest as an auxiliary to the usual 
spray, did not diminish infections of brown rot and scab, but never- 
theless might be desirable in very moist seasons. 
RECOMMENDATIONS FOR SPRAYING AND DUSTING 
The following schedules for spraying and dusting are formulated 
from the results reported in this bulletin, and are recommended for 
future use in the South, where two broods of the curculio frequently 
occur. 
SPRAYING SCHEDULE 
FIRST APPLICATION 
When 75 per cent of the petals (pink part of flower) have fallen: One pound 
powdered arsenate of lead, plus enough milk of lime (made from three pounds 
of stone lime to each 50 gallons of water) to make 50 gallons of spray mixture. 
SECOND APPLICATION 
When calyces or "shucks" are falling or when small peaches are exposed (this 
usually occurs about 10 days after the falling of the petals) : Spray mixture made 
as for the first application. 
THIRD APPLICATION 
Two weeks after the second application, or about four weeks after the petals 
have been shed: Self-boiled lime-sulphur, 8-8-50, alone. (No arsenate of lead 
in this application.) 
FOURTH APPLICATION 
Four weeks before the peaches are due to ripen: One pound powdered arsenate 
of lead to each 50 gallons of 8-8-50 self -boiled lime-sulphur. 
Should a grower fail to make the first application recommended, he should 
use arsenate of lead in the third application with the self-boiled lime-sulphur; 
but this should never be done unless, for an unavoidable reason, the first spray 
could not be applied, Because of the risk of injury, arsenate of lead should not 
be used in all four applications of the above schedule. 
EARLY PEACHES 
Early peaches should be sprayed three times. Use the materials recommended 
for the first, second, and fourth applications, applying them at the times already 
prescribed. For added protection against brown rot in early varieties, self- 
boiled lime-sulphur should also be used in the second application. 
