Abstract
AbstractEvidence from spore samples collected amongst infected straw spread on fallow ground supported the conclusion that spores of Pseudocercosporella herpotrichoides are dispersed mostly by rainsplash. Most spores travelled a short distance in the larger ballistic splash droplets, although some may have travelled further in smaller airborne droplets.Weekly spore counts from microscope slides under rainshields, a funnel and an impinger, evaluated as samplers for spores of P. herpotrichoides, showed a similar seasonal pattern. The funnel, as the largest sampler, generally collected most spores, but the impinger collected more spores per unit area of sampling surface. Slides sometimes collected spores when none was recovered from other samplers. Young wheat plants, exposed with the samplers and changed weekly, subsequently developed eyespot symptoms for most of the season.
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