96 Report oF rHE BoTANICAL DEPARTMENT OF THE 
4 
the result that slight damage was done by them before they were 
killed by the second application of poison, on July 22. 
The interval between the second and third sprayings was short- 
ened to ten days. This was thought necessary because much of 
the bordeaux had been washed off by rain, the weather conditions 
were highly favorable to blight and there were indications of an 
attack of flea-beetles. 
On September 12, two weeks after the fifth spraying, the 
plants of this series still possessed most of their foliage, enough 
to warrant a sixth spraying but for the fact that they were still so 
thoroughly coated with bordeaux from the last spraying as to 
make another application quite superfluous. 
Series I[I.—Series III consisted of rows 3, 6, 9, 12 and 195. 
They were not sprayed at all with bordeaux mixture but were 
treated twice (July 13 and 26) with paris green in lime water, 
one pound to fifty gallons in the first spraying and one-half 
pound to fifty gallons in the second. It was applied by means 
of a knapsack sprayer. In both sprayings the bugs were practi- 
cally all killed so that the rows of this series were not damaged 
by bugs. 
At Riverhead: Series I.—This series consisted of four rows, 
Nos. 1, 4, 7 and 10, which were sprayed with bordeaux mixture 
three times; namely, on June 14, July 21 and August 9. Poison, 
arsenite of soda,'® was used in the first spraying at the rate of 
one quart of the stock solution to 50 gallons of bordeaux, and 
in the second spraying at the rate of two quarts to 50 gallons. 
The third spraying was made with bordeaux alone. 
Serics [1.—This series consisted of four rows—Nos. 2, 5, 8 and 
11. They were sprayed with bordeaux six times; namely, on 
June 14, 27, July 11, 26, August 9 and 22. As on Series I, poison 
was used with the bordeaux in the first two sprayings; but the 
last four sprayings were made with bordeaux alone. 
Serics I1I.—Sevies III also consisted of four rows—Nos. 3, 6, 
9 and 12. The rows of this series were not sprayed at all with 
bordeaux, but when bugs appeared in destructive numbers (July 
6) they were poisoned by dusting the plants with arsenate of lead. 
The treatment was effective and there was no further trouble with 
bugs, but in some places the foliage was slightly burned by the 
poison. 
For the preparation of arsenite of soda see p. 190. 
