Geographical Spread
Agriculture was introduced into Australia in the 18th century. This introduction also included plant pathogens. Thirty eight potyvirus species have been isolated in Australia. Eighteen potyviruses have been found only in Australia and are presumed to be endemic there. The remaining twenty appear to have been introduced with agriculture.
Read more about this topic: Potyvirus
Famous quotes containing the words geographical and/or spread:
“Mens private self-worlds are rather like our geographical worlds seasons, storm, and sun, deserts, oases, mountains and abysses, the endless-seeming plateaus, darkness and light, and always the sowing and the reaping.”
—Faith Baldwin (18931978)
“Isolate city spread alongside water,
Posted with white towers, she keeps her face
Half-turned to Europe, lonely northern daughter,
Holding through centuries her separate place.”
—Philip Larkin (19221986)