388 ReEporT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
REMEDIES FOR THE SAN JOSE SCALE AND DI- 
RECTIONS FOR THEIR USE.* 
Pal ibARROda. 
THE LIME-SULPHUR WASH. 
The formula and directions for preparing the lime-sulphur wash 
are as follows: 
Dutta LTE 15 aes see wea a nes gee ca ee oe ee 20 lbs. 
SUDHUL:. sc fs oe eae bk eel pec et een ee ios 
Waters 25. Sivestena ooo oe Get eee nes eo et een eee 50 gals. 
Place the lime and the sulphur in a kettle containing about fifteen 
to twenty gallons of hot water. Stir the mixture frequently during 
the cooking process to assist the chemical union between the lime 
and the sulphur, and to prevent the caking of the materials upon the 
sides of the vessel. Boil for one hour, then add hot or cold water 
as is convenient, to make the required amount of wash. The mix- 
ture, when properly prepared, is of an orange yellow color. For 
use, strain the wash through fine-mesh wire screen to remove coarse 
particles, and apply to the trees as soon as possible after cooking. 
After each day’s operation, rinse the tank to remove the sediment, 
and pump water through the spraying outfit to clean hose and 
nozzles. Flowers of sulphur, and light and heavy sulphur flour 
may be used. Because it is cheaper the latter grade is now largely 
purchased. Fresh stone lime, that forms an even paste free from 
grit and dirt, should always be used for this wash. 
TIME TO APPLY SULPHUR WASHES. 
The sulphur washes are very destructive to foliage, which limits 
their use to the late fall or early spring, when the trees are in a 
dormant state. If the spraying can be done in season, we advise 
*A reprint of Circular No. 9, new series. 
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