venient. The boiling due to the slaking of the lime thoroughly 
mixes the ingredients at the start, but subsequent stirring is acces- 
sary if the wash is cooked In direcl heal in kettles, [f cooked \>\ 
steam no stirring will be uecessary. After the wash has been pre- 
pared it must be well strained as it is being run into the spray pump 
or tank. The wash may be cooked in large kettles or preferably l>\ 
steam in barrels or tanks. 
Miscibh oils. — Under the head of miscible oils are designated 
several commercial insecticides coming into considerable use as spraj s 
for scale insects during the dormant period of the trees, and their 
use will often be advantageous, especially where but a few tree- are 
to be treated. Miscible oils should be used on dormant tree- at the 
strength recommended by the manufacturers. 
Commercial limesulpkw washes. There are on the market several 
brands of concentrated lime-sulphur solutions, designed to replace 
the homemade lime-sulphur wash, mentioned above. These washes 
in general have proved to be satisfactory for the control of the San 
Jose scale, and will doubtless be about as effective against the oyster- 
shell and scurfj scales as the homemade wash, the preparation of 
which may thus be avoided if desired. These may be used on dor- 
mant trees, or, much more dilute, on trees in foliage. 
Approved: 
J IMES Wn SON, 
Si cri tary oj . igriculiurt . 
Washington, D. ('.. March 30, Wlu. 
[Cir. 121] 
o 
