New York AGRICULTURAL EXPERIMENT STATION. 425 
Sprayed and in which the scale is well under control, it is 
possible that somewhat weaker. preparations than those ad- 
vised may be safely employed, which can be more satisfactorily 
determined by the fruit grower himself from his own ex- 
perience. 
EXPERIMENTS WITH CONCENTRATED SOLUTION OF BLISTER-MITE. 
The experiments were made on Greenings, about forty years 
of age and for several years considerably infested with the leaf 
blister-mite. The concentrated solution used in these tests was 
clear, and registered 33° B. The range of dilution of the ap- 
plications was from one gallon of the solution with eight gal- 
lons of water, to one gallon of the concentrate with fifteen gal- — 
lons of water. Applications were made during November of 
1908 and during April of 1909. In some of the preparations 
lime was used, to determine the value of its addition to a lime 
sulphur-solution for the treatment of the mite. 
Results on mite and discussion.— All preparations of the 
lime-sulphur wash, at the dilutions mentioned, completely con- 
trolled the blister-mite. The addition of lime paste had no ap- 
preciable influence on the effectiveness of the mixture. From 
the results of these experiments, a preparation comprising one 
gallon of lime-sulphur solution, testing 33° B. and diluted with 
eleven gallons of water is an efficient spray for blister-mite, and 
this strength is advised for the treatment of orchards infested 
with this pest, because of its reasonable cost, and its probable 
greater effectiveness for other parasites than more dilute prep- 
arations. As is indicated by the results of the tests, a weaker 
mixture than is advised could undoubtedly be safely used to 
control the blister-mite alone. 
SPRAYING POISONS IN LIME-SULPHUR SOLUTIONS. 
Present studies indicate that arsenical poisons may be com- 
bined with lime-sulphur solutions. The available poisons are 
arsenate of lead*, and arsenitet of lime. Fruit growers who 
are spraying for blister-mite may apparently safely combine the 
*C. E. Bradley. Jour. Indus. and Eng. Chem. 1, 8: 606. 
7 J. P. Stewart. Penn. Sta. Bul. 92. 
