1891.] Entomology. 7I 
of benefit of 75.6,—just .2 per cent less than. in 1888. Plums sprayed 
with a combination of London purple and the Bordeaux mixture 
matured a full crop, while unsprayed trees a few rods distant lost all 
their fruit. The record of this year’s work will be found in the Bul- 
letin of the Ohio Agricultural Experiment Station for September, 1889 
(Vol. II., pp. 133-143). 
While these experiments were made as complete and satisfactory as 
the circumstances would permit, and every essential detail was inserted 
in the records, they were open to three objections, namely: First, that 
while the remedy might work in a region like Central Ohio, where 
fruit-growing forms only a small proportion of the agricultural interests 
of the inhabitants, and where the Curculio, though abundant, is not 
so overwhelmingly present as in a region almost exclusively devoted to 
fruit production, it might be impracticable in the latter region ; second, 
that the plum orchard was not sufficiently large to make a test under 
the conditions of the commercial orchardist; and third, that the 
cherries upon which some of these experiments were conducted ripened 
before the season of egg deposition of the Curculio was over. ,The 
force of these objections was fully appreciated while the experiments 
were in progress, but the work was done in the belief that results of 
_ value could be so obtained, and with the expectation of giving the 
method a thorough trial, from the standpoint of the commercial 
orchardist, if the preliminary tests were sufficiently encouraging. 
The present season a plum orchard of goo bearing trees in Ottawa 
county, Ohio, right in the heart of a great fruit-growing region, was 
selected for the experiment. In the north half of it the method of 
catching the Curculios by jarring on a sort of inverted umbrella 
mounted on wheels was employed, while the south half was sprayed 
four times with pure Paris green mixed with water, in the proportion 
of four ounces to fifty gallons. 
The first application was made May 8th, just after the blossoms had 
falen from the late-blooming varieties. There was a heavy rain the 
same night, and it rained almost continuously until May 15th, when 
there was a short cessation. The second spraying was done on that day. 
The third spraying was made May 26th, and the fourth and last, June 2d. 
On the jarred portion of the orchard a great many Curculios were 
caught, showing that they were present in numbers. A careful ex- 
amination of both parts of the orchard was made on June 3d. Between 
_ One and two per cent, of the fruit on the sprayed trees had been stung, 
while about three per cent. of the plums on the jarred trees were in- 
jured. No damage to the trees was then perceptible. 
