10 HARRISONS’ NURSERIES, BERLIN, MD., U.S.A. 
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Spraying 6-Year-Old Peach Orchard. 
Commercial.—Lime-sulfur solution may be purchased from various 
firms. It should be diluted as above. Soluble oils may be substituted 
1 to 15 for dormant spray. Dry sulfur compounds, manufactured by 
various firms, may be used in place of the liquid lime-sulfur if applied 
at the maximum amount recommended by the manufacturers. 
2. SELF-BOILED LIME-SULFUR: 
Blowers: of: sulfurs;cscne cee ee eee scieererenaie 8 lbs. 
Stone; lime sof geod, qualitye. es anes eee nee 8 Ibs. 
Waters cine coh wie chs ere ae See eee deel suekiae aes 50 gals. 
Start the lime to slaking with a little water. (Use hot water if lime 
is slow-acting.) As soon as the lime begins to slake rapidly, add the 
sulfur and stir continuously, adding just enough water from time to time 
to form a thin paste and to allow the mixture to boil violently for from 
three to five minutes. Add cold water to prevent any further action of 
the lime. Strain at once into spray tank. Add water to make 50 gals. . 
Larger quantities in the same proportion may be made, but greater care 
will be required to prevent the mixture from becoming too hot, in which 
case the sulfur will be dissolved and there will be red scum formed on 
the surface. This red material will injure the foliage and fruits. When 
applying this spray, a good agitator is essential. Atomic sulfur, a 
commercial product, used at the rate of 5 lbs. to 50 gals., may be 
substituted. 
3. BORDEAUX MIXTURE: 
Copper sulfate (Blue-stone)........... HA ra eeoanen 4 lbs. 
Stones limemot# good iqtualityavocer lteter ee 5 lbs. 
Water: sti tea as hp Ee NS Awe Bate ae 1 BS akcteir ts aketenes 50 gals. 
Dissolve the blue-stone by suspending it in a bag near the surface of 
a few gallons of water contained in a wooden or earthen vessel. Slake 
the lime and add several gallons of water so as to make milk of lime. 
Pour the blue-stone into the spray tank and add enough water to make 
20 to 30 gals.; then strain the milk of lime into the barrel, agitating the 
mixture vigorously. Add water to make 50 gals. Use immediately. 
STOCK SOLUTIONS: 
Dissolve blue-stone at rate of 1 lb. to 1 gal. water. Slake lime and 
| dilute at rate of 1 Ib. to 1 gal. Keep in separate covered containers 
until ready to make bordeaux according to above formula. Prepared 
bordeaux, either dry or in paste, or Pyrox may be substituted. 
4. ARSENICALS: 
Arsenate of lead is the standard stomach poison. It is furnished in 
both the powder and paste form. The powder is much the easier to use 
as it can be used dry, as a dust, or combined with liquids. The paste 
is not easily kept for any length of time because of evaporation, and 
hence cannot be held over from one season to another as easily as the 
powder. 
Arsenate of lime is effective for truck crops and apples and is cheaper. 
Arsenite of zinc is a quick-acting poison, valuable for truck-crop work. 
5. CORROSIVE SUBLIMATE OR BICHLORIDE OF MERCURY: 
Seed Potato Treatment. 
Dissolve 4 oz. in a little warm water in a wooden or earthen vessel 
and dilute to 30 gal. Immerse whole potatoes in the solution for 1% 
hours. Dry and cut. Use only four or five times. DEADLY 
POISONOUS. 
FORMALIN: Use one pint to 30 gal. of water. Immerse whole , 
potatoes for two hours: dry and cut. 
6. NICOTINE SPRAYS: 
Nicotine in various forms and under such trade names as Black Leaf 
40, may be purchased from insecticide dealers, and should be used as 
directed in the schedule for aphids. 
