190 
TREES AS GOOD CITIZENS 
Kerosene. 2 gallons 
Fish-oil soap (or laundry soap). )/2 pound 
Water. 1 gallon 
(One quart of soft soap may be used instead of the soaps 
specified above.) 
Boil the water and soap together until the soap dis¬ 
solves. This mixture should then be removed from the 
fire, the kerosene added and the mixture stirred briskly 
for five minutes, or until it has the consistency of cream. 
This concentrated mixture must be diluted with water 
at the time of spraying. For use in summer, when the 
trees are in leaf, the dilution should be at the rate of 5^ 
gallons of water to each gallon of the mixture. For use 
in winter, when the trees are dormant, the rate should be 
l /4 to 3 gallons of water to each gallon of the mixture. 
The concentrated mixture will keep for some time in its 
original form, but the diluted mixture should be used as 
soon as prepared. 
Creosote Oil. —This is used for the destruction of tus¬ 
sock moth egg masses, especially when they cannot be 
removed successfully. It is applied by daubing with a 
mop. The oil thickens in cold weather, in which case it 
requires thinning with turpentine. 
Miscible Oils. —There are various miscible oils, which 
are mixtures to be bought ready-made. Their use is 
effective in controlling the scale insects. The mixtures are 
sold under various trade names, and since they vary in 
strength, careful attention must be paid to the directions 
for dilution as printed on the labels. These oils are apt 
to injure foliage if applied during the leaf season, and for 
this reason they are usually employed as winter sprays. 
In addition to this factor, winter spraying has the added 
advantages that the absence of foliage makes it possible 
to use stronger solution, and also makes it easier to reach 
the insects with the spray. 
