CENTER POINT, IOWA 
33 
Spraying Information 
Spraying is now recognized as a necessary operation to keep plants and trees 
healthy, especially where grown extensively; accordingly we print a few ot the 
standard formulas and a very brief outline of treatment for the common fruits hor 
more complete information send to the Horticultural Department at Ames, Iowa, 
for spraying calendar. 
FOR BITING INSECTS 
Lead Arsenate. 
Lead acetate (sugar of lead) n oz 
Sodium arsenate 4 oz. 
Water SO gal. 
Pulverize and dissolve the acetate and 
arsenate separately and pour together. 
This formula may be used two or three 
times this strength without injury to 
plants. It adheres better than any oth- 
er arsenical spray and is altogether more 
desirable. 
Paris Green. 
Paris Green ? lb- 
Lime (fresh) I lb. 
Water 100 to 200 gals 
Hellebore — Also for Sucking Insects. 
White Hellebore 1 oz. 
"Water 2 gals. 
Or mix with three parts flotir and dust 
on. It does not poison ripening fruit. 
FOR SUCKING INSECTS 
Kerosene Emulsion. 
Kerosene (coal oil) 2 gals. 
Rain water 1 gal. 
Soap I;2 lb. 
Dissolve soap in water by boiling; 
take from fire and while hot turn in 
kerosene and churn briskly for five min- 
utes. To be diluted before using, with 
nine parts water; for scale, insects and 
sucking insects on growing plants. 
Tobacco Infusion 
Tobacco (waste stems) 1 lb. 
Boiling water 4 gals. 
Add hot water to tobacco and let 
stand until cold. Strain and add 1 lb. of 
each 50 gallons of infusion. For aphis. 
Pyrethrum or Insect Powder. 
Pyrethrum powder 1 oz. 
Water 3- gals 
For dry application — Mix thoroughly 
one part by weight of insect powder 
with four of cheap flour and keep in a 
closed vessel for twenty-four hours be- 
fore dusting over plants attacked. 
Lime- Sulphur Wash. 
Quicklime (fresh) IS lbs. 
Sulphur 15 lbs- 
Fresh calcium lime must be used to 
get good results. Place lime in kettle, 
add sufficient water to shake and stir in 
sulphur while shaking. Boil until dis- 
solved, which requires an hour or more. 
Add sufficient water to make 50 gallons 
and apply while warm. This solution 
can now be bought ready made very 
cheap. Apply only to dormant trees. 
FUNGICIDES 
Bordeaux Mixture. 
Copper-sulphate 5 lbs. 
Quicklime (not air-slacked) 5 lbs. 
Water 50 gals. 
Dissolve the copper-sulphate (blue 
stone) by suspending it in a wooden 
vessel such as a half-barrel containing 
25 gallons of water; slake the lime in 
another vessel. The slaking should be 
done slowly, otherwise it is apt to be 
granular. Now dilute the slaked lime 
in 25 gallons of water, and pour it and 
the copper-sulphate into the sprav bar- 
rel at the same time. Do not pour in 
first one and then the other, as this will 
not allow the proper combination of 
chemicals to take place and a sediment 
will be formed that will clog pump and 
nozzles. 
It is well to strain the solutions as 
they are poured together, for which pur- 
pose a copper strainer having 18 to 24 
meshes to the inch is recommended. 
Do not add the lime until ready to ap- 
ply the mixture. 
Stock solutions of dissolved copper- 
sulphate and lime may be prepared and 
kept in separate covered barrels 
throughout th e spraying season. The 
proportions of blue stone, lime and wa- 
ter should be cafefullv entered. 
Dilute Bordeaux Mixture. 
This mixture is made exactly as 
the above with the exception that it is 
1-2 to 23 as strong. This mixture 
should be used for trees having tender 
foliage, such as the peach and Japanese 
plum. 
Bordeaux Mixture Test. 
The quantity of lime required in 
Bordeaux mixture varies considerably; 
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