386 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
water if needed to make the required fifty gallons of concentrated 
solution.+ 
For use, dilute the concentrated sulphur solution at the rate of 
five gallons of the liquid to forty-five gallons of water. To every 
barrel of 50 gallons capacity of the diluted spray, add from ten to 
fifteen pounds of lime, made into a paste. The addition of the 
lime is not necessary, but by its use the trees are given a white- 
washed appearance, which enables farmers to judge better of the 
thoroughness of their spraying. This mixture may be used im- 
mediately after cooking, or may be barreled, to be drawn on as 
occasion requires. A greater dilution than that recommended may 
perhaps be employed in spraying for the mite. The mixture pre- 
pared after this formula does not leave as heavy a deposit on the 
trees as the ordinary boiled lime-sulphur wash, but in spraying for 
the mite this difference is immaterial. To avoid the loss of sul- 
phur, the sediment that remains after drawing off the concentrated 
solution should be boiled over again with fresh lime and water, and 
the liquid used to start fresh preparations or for purposes of dilu- 
tion. For this formula we are indebted to Prof. A. B. Cordley ot 
the Oregon Experiment Station, who has employed it in his ex- 
periments with sulphur sprays for the treatment of trees in foliage. 
COMMERCIAL PREPARATIONS OF LIME-SULPHUR WASH. 
During the past year, a number of these preparations have ap-. 
peared on the market. Two of the most widely advertised have 
been quite extensively tested in various Station experiments with 
the blister-mite, and at the strength employed, one part to nine parts 
of water, have proven very efficient remedies. A number of volun- 
teer experimenters have reported equally satisfactory results. Fruit 
growers who have heretofore refrained from using the lime-sulphur 
wash for the mite, because of the trouble of making and the ex- 
pense of a suitable cooking outfit, may now use one of the com- 
mercial brands. Usually some lime paste should be added to these 
preparations, as, without it, it is difficult to tell how thoroughly the 
applications have been made. 
*The concentrated solution gives a reading of about 25° on a Beaumé 
hydrometer. Fruit growers are advised to use this instrument in order to 
test their preparations. A Beaumé hydrometer costs 75 cents and can be 
purchased from Eimer & Amend, 205 Third Ave., New York City, and from 
other dealers in druggists’ supplies. 
