SPRAYING POTATOES.
i PREPARATION OP BORDEAUX : MIXTURE. With the advent of the potato season the spray as a preventive of blight will ' soon be in general us 6. A correspondent asks what the potatoes should be sprayed with and how tho mixture should be 1 made. Tho best spray for potato blight is Bordeaux• mixture prepared as under:— Proportions—4lb." sulphate of copper, 41b. fresh' roche lime, 40 gallons water. The ■llbi of sulphate of copper-should be dissolved in 20 gallons of water. The'linle should be slaked slowly and made up to 20 gallons. This milk of limo should then be strained into the solution of sulphate of copper and stirred briskly. The sulphate of copper may ba dissolved by tying up a piece' of sacking and suspending'it for a few hours just below tho surface of the water, or it may be dono by using hot water. Spraying should bo , commenced as soon as the crop is well above the ground and care should be taken to get the mixture on to th'a stems and tho undersides- of the leaves., Tile i treatment should be continued at intcri vals of about' two weeks, but if the season : is a very dry one, the'intervals may be • longer. ■ . • .
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Dominion, Volume 6, Issue 1556, 27 September 1912, Page 10
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206SPRAYING POTATOES. Dominion, Volume 6, Issue 1556, 27 September 1912, Page 10
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