A 7-Day Recording Volumetric Spore Trap

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Abstract
A recording volumetric spore trap that can be assembled in .apprx. 4 h at a low cost was designed, constructed and tested. The trap will operate on AC or DC electrical power and is constructed of polyvinyl chloride (PVC) pipe and sheet. Spores are drawn through a slit-like orifice and are deposited on a clear tape mounted on the cylinder of a chart drive. The trap will sample 15 L of air/min when a 12-V DC power source is used. Although similar in appearance and operation to the Burkard volumetric spore sampler, the efficiency of the PVC trap in capturing ascospores of Venturia inaequalis and conidia of Monilinia fructicola exceeded that of the Burkard trap in orchard and wind tunnel tests.