P. infestans
is dispersed by wind-borne sporangia,
located at the leaf stomata, where they encyst and germi-
nate to initiate infection. Xcn1 from
X. nematophila
var.
pekingensis
suppressed mycelial growth and sporogenesis
of
P. infestans
, reducing disease development, and also
decreasing secondary infection of the fungus.