i6 
COLORADO EXPERIMENT STATION 
of one gallon to sixty or sixty-five gallons of water. We have usually suc¬ 
ceeded in killing plant lice with this preparation in the proportion of one 
gallon to each one hundred gallons of water. Thoroughness of application 
is of as much importance as the strength of the material used. 
If this substance is not obtainable in your home town it may be procured 
from the Watkins Merchandise Co., Denver, or The Kentucky Tobacco 
Product Co., Louisville, Kentucky. 
Miscible Oils _There are several miscible oils upon the market 
which may be added directly to water forming a milky emulsion at once. 
In the preparation of any of these, such as “Scalecide,” or “Target Brand 
Scale Destroyer” or “Killoscale,” add the oil directly to the water with a 
I’Ple stirring. One gallon of the miscible oil in 30 to 50 gallons of water 
will make a mixture, which in most cases will be strong enough to kill plant 
lice, if thoroughly applied. 
Lime-Sillfiir Mixture —(For winter spray only.) 
Flowers of sulfur, fifteen pounds. 
Good lump lime, fifteen pounds. 
Water, forty-five gallons. 
This is the 1-1-3 lime-sulfur mixture. First slake the lump lime with* 
sufficient warm wa^'er, and while still boiling hot add the sulfur and stir it in. 
Place over fire and continue the boiling, adding water when necessary, until 
the mixture changes to a deep reddish brown color which indicates that the 
lime has cut the sulfur. It will be necessary to boil steadily for about forty 
minutes to one hour to produce this result. The mixture should then be 
diluted to form forty-five gallons of the spray, and should be applied at 
once. 
When the lime-sulfur mixture is placed in the barrel or tank it should 
be strained to take out all lumps that would clog the spray nozzle. If al¬ 
lowed to stand for any great length of time after being prepared, the lime- 
sulfur crystalizes out to a considerable extent. In such a case it is neces¬ 
sary to heat the mixture again before applying so as to dissolve all the 
crystals. If the crystals are re-dissolved the mixture will be as strong as 
before. 
To make 1-1-2 lime sulfur mixture, prepare as above using only thirty 
gallons of water for the fifteen pounds of lime and the fifteen pounds of 
sulfur. 
For the 1-1-4 lime-sulfur mixture prepare in the same manner, but 
dilute to sixty gallons before applymg. 
Rex Lime-Sulfur —We have found the Rex lime-sulfur in the propor¬ 
tion of one gallon of the Rex to seven or eight gallons of water to be just 
about equal in effect to the 1-1-3 home made lime-sulfur preparation. Rex 
lime-sulfur solution can be made white by the addition of lime at the rate 
of 5 to 10 pounds for each 50 gallons of spray. 
Whale-Oil or Fish-Oil Soaps —The so-called whale-oil or fish- 
oil soaps which are quite extensively used for the destruction of plant 
lice, will usually be effective if thoroughly applied in the proportion of one 
pound of the soap to each six to eight gallons of water. There are num¬ 
erous brands.of these soaps upon the market. Those that we have used 
quite successfully are Good’s Whale-Oil Soap and Bowker’s Tree Soap. 
