Abstract
Lubricating oil emulsion, wettable sulfur with nicotine sulfate, and nicotine dust (2 per cent nicotine) controlled the rosy aphis ( Anuraphis roseus ), altho none of these preparations were quite so effective as lime-sulfur with nicotine sulfate, which is the standard treatment. The spray mixtures should be applied preferably during the delayed-dormant period, while dust mixtures containing a 2 per cent nicotine will probably give best results when used for the pre-pink treatment. Dust and spray mixtures applied during the pink and calyx periods gave in most instances inferior control.
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