Rhizoctonia control improved by liquid banding of fungicides
Bogacki, P., Desbiolles, J., Correll, R., Hüberli, D., MacLeod, W. and McKay, A. (2014) Rhizoctonia control improved by liquid banding of fungicides. In: 8th Australasian Soilbourne Diseases Symposium, 10 - 13 November, Hobart, Tasmania.
Rhizoctonia root rot of wheat and barley caused by Rhizoctonia solani AG-8 continues to cause significant yield losses, especially in no-till cropping systems in low to medium rainfall regions across southern Australia. This study was conducted to determine if liquid banding of the fungicides Uniform® and EverGol® Prime could significantly reduce yield losses attributed to Rhizoctonia. From 2011-2013, 28 trials were conducted at 14 sites across SA and WA; Uniform® was evaluated in 10 barley and 11 wheat trials, and EverGol® Prime in 6 barley trials sown using a knife point furrow opener. Sites had significant levels of Rhizoctonia prior to seeding and treatments included banding fungicide 3-4 cm below the seed, on the soil surface behind the press wheel and a combination of both. Seed treatments plus/minus banding fungicide below the seed were also evaluated. Vibrance™ and EverGol® Prime seed treatments produced significant yield responses in 4/21 and 2/6 trials, respectively. Uniform® banded below the seed at different rates produced significant yield responses in 21/33 trials and EverGol® Prime in 2/8 trials. The split Uniform® treatment applied to the surface and below the seed produced the greatest proportion of significant yield responses, 14/19 trials, with net yield increases of up to 0.87 and 0.53 t/ha in barley and wheat, respectively. For EverGol® Prime this split treatment resulted in 2/5 trials showing significant responses with the largest net gain being 0.44 t/ha in barley. The APVMA is currently reviewing submissions to have Uniform® registered for banding on the surface and below the seed, and EverGol® Prime below the seed only .
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