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Niagara Cyclone duster mounted on a 5-row Grand Haven tractor to blow dust into the furrows while sowing onions. The dust was probably formulated to inhibit the growth of a parasite, Urocystis cepulae, which causes smut on onions. Farm in Owego, New York. 1952.

Image: H. Lyon. Copyright © Dept. of Plant Pathology, Cornell University