PREPARATION OF SPRAYS:
Bordeax Mixture.—To make: 4 gals powdered bluestone may be dissolved readily in 2 pints of hot water in an earthenware or wooden vessel. Bluestone crystals may be tied in sacking, and suspended just touching the hot water. Mix the hydrated lime to a thin paste with 2 pints of water. When bluestone is dissolved, add 3/2 gals of water, and then thoroughly mix the 2 pints of hydrated lime with the bluestone solution, stirring rapidly for a few minutes.
Containers for spraying and mixing sprays should be of copper, brass, wood or earthenware. Bordeaux must be used within 8 hours after mixing.
All quantities given in the spray programme below are for 4 gallons of spray.
|Time of Application||Treatment||Pest of Disease|
|Early green tip (September)||Bordeaux Mixture: Bluestone 6ozs, Hydrated Lime 5ozs, Water 4 gals.||Blackspot|
|Open cluster to pink||Lime Sulphur 1/3 pint, Water 4 gals.||Black Spot Powdery Mildew|
|Petal Fall Thereafter, every 18 to 21 days, until picking commences||Arsenate of Lead 1ozs, Hydrated Lime 3ozs, Water 4 gals.||Codlin Moth|
|Blossom, bud movements usually early to mid-August for most varieties. (Important: This is the only spray for control of leaf curl. Buds must be swelling prior to breaking.)||Bordeaux Mixture: Bluestone 6ozs, Hydrated Lime 5ozs, Water 4 gals.||Leaf Curl Shot-hole Fungus Bladder Plum|
|Late pink, petal fall Repeat every 3 or 4 weeks, until two weeks before picking||Lime Sulphur 1/3 pint, Water 4 gals.||Brown Rot Leaf Rust|