How does the interspersed refuge system work?
In an interspersed refuge system, non-virulent midge survive on the 10% susceptible plants interspersed throughout the wheat field. The non-virulent midge inter-mate with virulent (resistant) midge. The progeny of this cross are non-virulent. This prevents a build up of virulent midge, and could extend the life of midge tolerance to 90 years or longer.
