Host Specificity, Pathotypes
Within the cucurbit family, P. cubensis isolates will exhibit a specific host range, that is, it will infect certain cucurbits and not others. For example, if cucumber and squash are grown side-by-side sometimes only the cucumber is diseased. When a pathogen exhibits this type of host specificity within a plant family, it is referred to as a pathotype. At least five pathotypes of P. cubensis have been described in the U.S. More recent studies in the Czech Republic have revealed more pathotypes.
Read more about this topic: Pseudoperonospora Cubensis
Famous quotes containing the word host:
“Carlyle’s works, it is true, have not the stereotyped success which we call classic. They are a rich but inexpensive entertainment, at which we are not concerned lest the host has strained or impoverished himself to feed his guests. It is not the most lasting word, nor the loftiest wisdom, but rather the word which comes last.”
—Henry David Thoreau (1817–1862)