Avoid rust with resistant varieties

30 Oct, 2008 09:35 AM

A newly released GRDC Fact Sheet on rust management is advising growers not to grow susceptible or very susceptible wheat varieties.

Dr Rohan Rainbow, GRDC manager for crop protection, says that although stripe rust can be controlled in susceptible varieties through strategic fungicide use, these varieties jeopardise the industry as volunteers can rapidly build up stripe rust in autumn, which keeps inoculum levels high.

"The best option for managing rust risk is to grow resistant varieties to keep the level of rust low, so other control measures aren’t required or, if needed, they will be more effective," he said.

"Resistance is the key industry wide strategy to managing cereal rust – the more rust in your crops and your neighbour’s, the higher the disease pressure will be across the country, resulting in greater opportunity for rust spores to mutate.

"This will lead to new virulent pathotypes and a breakdown in host resistance."



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