Abstract
A portable electric wet-dry shop vacuum run by a gas-powered generator was used to collect sclerotia of Claviceps purpurea from 1-m 2 areas in a commercial field of perennial ryegrass. Sclerotia were separated from soil and straw residue using an air-screen (seed separation) machine, in which samples were partitioned based on particle width and thickness, and terminal velocity. The procedure also was used to determine the number of sclerotia in bales of annual ryegrass straw. Efficiency of recovery of sclerotia using the air-screen machine with known numbers of ergot was 98-100%
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