The Use of Mineral Oils for Better Dusts1

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Abstract
Because of the physical conditions it has not been found practical to mix more than 5% by weight of oil with the dusts. With sulphur dusts, it is necessary to replace a part of the sulphur with hydrated dusting lime or other deflocculative material to give the mixture sufficient buoyancy. Dusts containing 60% sulphur or 16% CuSO4 H2O carry sufficient fungicidal material to give satisfactory control of many orchard diseases and can be easily handled by standard orchard dusters although they are not quite as buoyant as most orchard dusts.

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