218 THE PLUM CURCULIO. 
During 1906 there was a gain in sound fruit on the sprayed trees 
of 50.02 per cent as compared with the check of 50.01 per cent. The 
difference the following year, however, was small, 1.27 per cent, as 
the insects were comparatively scarce, no doubt following their 
practical extermination in the orchard the year previous. 
Extensive plum-spraying experiments were begun at Barnesville, 
Ga., in 1910. The work, however, was stopped by the loss of practi- 
cally all of the fruit from the effects of a heavy wind storm. 
RESULTS OF SPRAYING CHERRIES. 
A block of Montmorency cherry trees at North East, Pa., was 
sprayed June 11 with 3 pounds of arsenate of lead to 50 gallons of 
water plus 3 pounds of stone lime. Another block received an addi- 
tional application June 25, while a third block (4 rows through center 
of orchard) was left unsprayed. When fruit was gathered, July 18, 
three trees on the first-mentioned plat gave a total of 16 wormy 
cherries and 43^ pounds of sound fruit. The same number of trees on 
the second block, having 2 applications, gave 10 wormy cherries 
and 53 pounds of sound fruit. The 3 trees on the check plat gave 74 
wormy cherries and only 16 pounds of sound fruit. The trees were 
chosen as nearly alike as possible and the results may thus be fairly 
compared. As compared with the check, the plat treated twice 
shows an increase in sound fruit of 37 pounds and from the plat 
sprayed once a gain of 27.5 pounds. 
More data are needed to show the protection from curculio which 
will follow spraying plums and cherries, though this will without 
doubt be quite as marked as with peaches. The same spraying 
schedule indicated for early peaches will be suitable for plums and 
cherries, and the arsenical should be used in the self-boiled lime- 
sulphur wash. 
