SPRAY MATERIALS 
79 
Self-Boiled Lime Same method as given above. 
J o 1 1- r Lime " ios- 
and Sulphur for sulphur 8 lbs. 
Peach and Water 50 gal. 
"Tan" 'Pliimc This is best made up in quantities sufficient 
jdp i-iuiub j^j. gallons; i. e., 32 pounds of lime and 32 
pounds of sulphur. Always add sufficient cold water to cool the mixture 
when the lime is through slaking. If allowed to remain hot for some timt;, 
too much of the sulphur will go into solution, thus causing burning of 
the foliage. 
Sorav Mixture for The materials which come under this head are all 
fJ^,. ^ f . poisons which are sprayed on the fruit and foliage, 
r-ating insects Q^^iy ^jjg eating insects which bite their food 
from the surface can be controlled by the 'poisons. 
The poisons are generally combined with the fungus sprays, apply- 
ing both at the same time. 
Arsenate of Lead Lead Arsenate 3 to 5 lbs. 
Water 50 gallons. 
Buy the paste form. Mix thoroughly with a small amount of water 
before adding to the spray solution. This prevents lumps and clogging of 
nozzles. Use 3 to 5 pounds for 50 gallons, depending upon the kind of 
insect to be killed. This can be used alone or with the Bordeaux mixture, 
or with lime-sulphur. It should not contain free arsenic. Free arsenic 
burns the foliage. It takes more pounds of lead arsenate than it does of 
Paris green, but the cost is about the same, as the price per pound of lead 
arsenate is less, and it sticks to the leaves two or three times longer than 
the Paris green. If pure, it will not burn the leaves. Because of this fact, 
it is especially adapted for use on trees with tender foliage, where large 
quantities of 'poison are required to kill those beetles which are hard to 
poison. For general spraying, this is the best form of poisons. 
Contact Snrav Many insects have long beaks. They stick their 
. . ^ ^ beaks into the leaves or fruit and suck out the juice 
Materials jji^g ^ mosquito. They can not be poisoned, and a 
spray which kills by contact is necessary. 
Soap (hard, soft, or whale oil) 1-2 lb. 
Water 1 gal. 
Kerosene 2 gal. 
The above proportion gives a concentrated stock solution. Larger 
amounts may be used in mixing, if a vessel of suitable size is at hand. 
Dissolve soap in hot water (rain-water or other "soft" water is preferable). 
Take the vessel some distance from the fire and add kerosene (crude 
petroleum may be used instead of kerosene), agitate it with a paddle or, 
better still, use a small hand pump, working it back and forth for five 
minutes or until it becomes a thick, creamy liquid. The free oil should 
never separate from this and rise to the top, either in the stock or dilute 
solution. For San Joso scale and other uses on dormant trees, take one 
part stock solution to five or seven parts water. For plant lice on foliage 
during the growing season, take one part stock solution to ten or fifteen 
parts water, depending on the insect to be killed and the tenderness of the 
foliage of the plants on which it is used. 
Quicklime 20 lbs. 
Sulphur (Flour or Flowers) 15 lbs. 
Water 50 gal. 
This is different from the self-cooked preparation and is for use 
during the winter, when the trees are dormant, and there is no danger of 
injuring buds or foliage. Put 20 pounds of lime in an iron vessel, which 
should hold 20 or 25 gallons. If it holds 50 gallons, all the better. Add 
water (preferably hot) to the lime, until it starts to slake. Then add the 
