FOR FUNGOUS DISEASES
| Copper Sulphate | |
|---|---|
| Copper sulphate | 1 lb. |
| Water | 18 to 25 gal. |
Use only before foliage opens, to kill wintering spores.
| Bordeaux Mixture | |
|---|---|
| Copper sulphate (bluestone) | 4 to 5 lb. |
| Lime (good, unslaked) | 5 to 6 lb. |
| Water | 50 gal. |
Dissolve the copper sulphate (bluestone) in twenty-five gallons of water. Slake the lime slowly so as to get a smooth, thick cream. Never cover the lime with too much water. After thorough slaking add twenty-five gallons of water. When the lime and the bluestone have dissolved, pour the two liquids into a third vessel. Be sure that each stream mixes with the other before either enters the vessel. Strain through a coarse cloth.
Mix fresh for each time. Use for molds and fungi generally. Apply in fine spray with a good nozzle.
| Bordeaux-paris-green Mixture | |
|---|---|
| Ordinary Bordeaux mixture | 50 gal. |
| Paris green | 4 oz. to 2 lb. |
Use for both fungi and insects on apple, potato, etc.
| Bordeaux-Arsenate-of-Lead Mixture | |
|---|---|
| Ordinary Bordeaux mixture | 50 gal. |
| Arsenate of lead | 2 to 3 lb. |
Used for fungous and insect enemies of the potato, and of the apple when bitter rot is troublesome.
| Commercial Lime-Sulphur Arsenate of Lead | |
|---|---|
| Commercial lime-sulphur | 1½ gal. |
| Arsenate of lead | 2 to 3 lb. |
| Water | 50 gal. |
Use for spraying apples.
| Ammoniacal Copper Carbonate | |
|---|---|
| Copper carbonate | 5 oz. |
| Ammonia (26° Baumé) | about 3 pt. |
| Water | 50 gal. |
Dissolve the copper carbonate in the smallest possible amount of ammonia. This solution may be kept in stock and diluted to the proper strength as needed.
Use this instead of the Bordeaux mixture after the fruit has reached half or two thirds of the mature size. It leaves no spots as does the lime-sulphur wash or the Bordeaux mixture.