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Rhizoctonia new treatments and products

McKay, A., Bogacki, P., Gupta, V., Desbiolles, J., Correll, R., Roget, D., Hüberli, D. and MacLeod, W. (2013) Rhizoctonia new treatments and products. In: 2013 Grains Research Update, Australia Adviser Update, 12 - 13 February, Adelaide, South Australia

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Vibrance® and EverGol® Prime, new succinate dehydrogenase inhibitor (SDHI) fungicides have been registered in 2013 for suppression of Rhizoctonia. Both have been evaluated in field trials conducted by SARDI and DAFWA (Table 1). (See Cereal Seed Treatments 2013 Factsheet for activity on other fungi.)

Rhizoctonia bare patch caused by Rhizoctonia solani Kühn AG-8 is a difficult disease to manage, but research projects in SA and WA funded by GRDC and SAGIT are making significant progress towards improving management options.

Rhizoctonia occurs mainly in the low to medium rainfall regions of southern Australia, particularly in sandy soils, though its distribution extends into higher rainfall districts. Annual losses are estimated to be around $59 million in wheat and barley (Murray and Brennan, 2009).

Rhizoctonia is generally considered to be a pathogen of seedlings and not greatly affected by rotation: however results from the current GRDC funded projects show it can attack crops throughout the growing season and is affected by rotation. Cereals and grasses are the main hosts.

The current research program aims to improve disease prediction, reliability of existing control strategies and support development of new methods of control including banding fungicides and where appropriate assist with label extensions.

Item Type: Conference Paper
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