for Curculio injuries. The percentage of injury on the un 
70 The American Naturalist. 
‘ The trees were set very full of fruit, and much of this withered 
and fell. However, fully one-half of a crop was matured. There 
was one other tree in the orchard of this variety, and it matured more 
fruit than the other varieties, but not one-half as much as those which 
had been so thoroughly treated with the poison. This tree was set in 
spring as full asthey were. It seems possible from this note that the 
However, this is not at all certain.” 
It is needless to state that this part of Mr. Alwood’s experiment 
proved nothing. He also sprayed some cherry trees, treating one 
with Paris green once, and another with kerosene emulsion once. 
This experiment was even more fruitless than that on the plum, al 
was abandoned before final results were obtained. Some experiments 
of decided value, however, were made by Mr. Alwood upon feedin 
poisoned fruit and tines to Curculios in confinement, which will b 
referred to later. 
My own experiments upon this subject began in 1888, when sevent 
five Early Richmond cherry trees, occupying a half-acre block, were 
chosen for this work. The west half of the orchard was spraye 
the east half left as a check. London purple was applied three times, 
in the proportion of eight ounces to fifty gallons of water. At time ¢ 
ripening, eight sprayed trees and seven check trees were selected, : 
1,000 cherries from each were critically examined for Curculio i 
It was found that 14.5 per cent. of the unsprayed fruit gave 
of Curculio attack, while 3.5 percent. of the sprayed fruit was 
There was consequently a percentage of benefit of 75-8. The 
year similar experiments were made upon plums and pears, but 
in the record” the opportunities for a satisfactory test were not s0 
as with the cherries, so that, although the fruit was saved, less stress 
laid upon the results. 2 
In 1889 the cherry experiment was duplicated, the vari, 
orchard being reversed to eliminate any possible effect upon tí 
that might be due to the situation. In 1888 the west half was 
and the east half left as a check ; in 1889 the east half was 
and the west left as a check. London purple was applied three 
in the proportion of one pound to 160 gallons of water. A 
Tipening, 1,000 cherries were picked from each of twenty-four 
ach half of the orchard—a total of 48,000 cherries—and % 
~ Was 6.17, while on the treated trees it was 1. 5. This gives a pë 
x 12 Seventh Annual Rept. Ohio Agr. Exp. Station, pp. 134-150. 
