APHIS AND MILDEW
How To Control Common'Rose Pests Aphis and mildew are beginning io make an appearance in roses. To keep the plants free it is often necessary to spray them at regular intervals, and it is wise to begin now. For the control of mildew some form of sulphur is the best remedy. .At present, collodial sulphur, 2Joz. to four gallons of water, is best, or potassium sulphide, loz. to the gallon, may be used. Any contact insecticide will destroy aphis—nicotine sulphate is commonly used —but owing to their wonderful fecundity reinfection soon takes place in fine weather, and spraying must be repeated. Where the attack is persistent a weekly application is sometimes necessary.
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Dominion, Volume 34, Issue 45, 16 November 1940, Page 16
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115APHIS AND MILDEW Dominion, Volume 34, Issue 45, 16 November 1940, Page 16
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