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2014 APS Annual Meeting Abstract

 

Oral Technical Session: Disease Control and Pest Management

26-O

Management of soybean sudden death syndrome by seed treatment with fluopyram.
J. WANG (1), J. Jacobs (1), M. Chilvers (2)
(1) Michigan State University, East Lansing, MI, U.S.A.; (2) Michigan State University, East Lansing , MI, U.S.A.

Soybean sudden death syndrome (SDS), caused by Fusarium virguliforme, is one of the most yield limiting diseases in the US, and effective disease management options are limited.An experiment was conducted to test the efficacy of Fluopyram applied as a seed treatment to control the infection of F. virguliforme in soybean roots at a naturally infested soybean field. Plots were planted on May 1 with the cultivars 92Y60 and 92Y51. The experiment was a randomized complete block design with six treatments and five replicates. Treatments consisted of four rates of Fluopyram at 0.0375, 0.075, 0.15, and 0.25 mg a/mg, which were combined with a standard seed treatment of Evergol Energy (0.019 mg), Allegiance FL (0.021 mg), and Poncho/Votivo (0.13 mg) a/seed, standard seed treatment, and untreated seeds as controls. Plant samples were taken on 13 May, 13 June, 2 July, 11 July, and 3 September to determine root colonization of F. virguliforme with qPCR. SDS foliar disease rating based on disease severity and incidence was conducted on 16 August. No significant differences between treatments were detected in stand count, disease index, or yield. With the soybean samples collected 2 weeks after planting, no significant effect of seed treatment on F. virguliforme colonization was detected. In other trials located within the same field, significant reductions in SDS disease and corresponding yield increases were noted in other cultivars in response to Fluopyram treatments.

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