Grains Research and Development

Date: 01.09.2002

Why is variety resistance breaking down?

THE LEVEL of disease inoculum present in crops and stubbles has a direct impact on the rate of disease resistance breakdown. When susceptible varieties are grown in an area with wet conditions favourable for the disease, high levels of the fungal population can result, providing more opportunities for mutations to occur.

When fungicides are applied poorly, at low rates or at late stages of infection, high levels of inoculum will result.

For more information contact:

SA: Dr Hugh Wallwork, SARDI 08 8303 9382 email

VIC: Dr Grant Hollaway, VIDA 03 5362 2111 email

NSW: Dr Gordon Murray, NSW Agriculture 02 6938 1879 email

Or simply type 'net form of net blotch' into the search engine on the GrainZone web site: