SPRAYING PEACHES. 35 
violent boiling, and constant stirring result in a uniform mixture 
of finely divided sulphur and lime, with only a very small percentage 
of the sulphur in solution. It should be strained to take out the 
coarse particles of lime, but the sulphur should be carefully worked 
through the strainer. 
DIRECTIONS FOR USING ARSENATE OF LEAD. 
Many experiments have shown that well-made arsenate of lead is 
much the safest of all available arsenicals for use on the peach. 
Arsenate of lead is to be found on the market both as a powder and 
as a putty-like paste, which latter must be worked free in water 
before it is added to the lime-sulphur mixture. The paste form of 
the poison is largely used at the rate of about 2 pounds to each 50 
gallons of the lime-sulphur wash and is added, after it has been well 
worked free in water, to the lime-sulphur spray previously prepared. 
As there are numerous brands of arsenate of lead upon the market, 
the grower should be careful to purchase from reliable firms. <A 
decided change in color will result when the arsenate of lead is added 
to the lime-sulphur mixture, due to certain chemical changes which, 
in the experience of the writers, do not injuriously affect the fungi- 
cidal and insecticidal properties of the spray or result in injury to 
the foliage. 
In large spraying operations it will be more convenient to prepare 
in advance a stock mixture of arsenate of lead, as follows: Place 100 
pounds of arsenate of lead in a barrel, with sufficient water to work 
into a thin paste, diluting finally with water to exactly 25 gallons. 
When thoroughly stirred, each gallon of the stock solution will thus 
contain 4 pounds of arsenate of lead, the amount necessary for 100 
gallons of spray. In smaller spraying operations the proper quantity 
of arsenate of lead may be weighed out as needed, and thinned with 
water. In all cases the arsenate of lead solution should be strained 
before or as it is poured into the spray tank. The necessary care 
should be exercised to keep the poison out of the reach of domestic 
and other animals. 
DANGER OF INJURY FROM SPRAYING. 
As stated elsewhere in this bulletin, the foliage of the peach is 
extremely sensitive to injury from such sprays as Bordeaux mixture 
and arsenicals, such as Paris green, arsenate of lead, etc. This sensi- 
tiveness has been the sole reason why it has been impracticable to 
spray peach orchards with fungicides and insecticides such as Bor- 
deaux mixture or Paris green, as has for years been the custom in 
the case of apples, grapes, and other deciduous fruits. 
440 
