Aphid alert: how it came to be, what it achieved and why it proved unsustainable

‘Aphid Alert’ was the name used to identify a series of research and outreach initiatives undertaken from 1992 to 2003, and in some instances since, to address potato virus problems in seed potato production in the Northern Great Plains (NGP) of the USA, in particular northwestern Minnesota and eastern North Dakota. Aphid Alert was adopted [...]