Response of Podosphaera macularis when inoculated onto abaxial and adaxial surfaces of hop cone bracts in varying developmental stagesa.

a A conidium was considered germinated if a germ tube was present and elongated to at least half the length of the conidium. Values presented are percentage of conidia evaluated that were germinated. Penetration was assumed if a conidium had secondary branching hyphae.b Means of variables are statistically similar if followed by the same letter according to a generalized linear mixed model (α = 0.05). Developmental stage × bract surface interactions were nonsignificant in all experiments (P ≥ 0.05). Germination, penetration, and hyphal development are means calculated from observations of 1543 conidia or 938 microcolonies evaluated over three replications of the experiments conducted during 2013. Latent period is the number of days after inoculation when 50% of hop cones bore sporulating colonies of P. macularis.Response of Podosphaera macularis when inoculated onto abaxial and adaxial surfaces of hop cone bracts in varying developmental stagesa.