2014 Soybean Variety Trial Disease Ratings, Part III: Maturity Group V Varieties

Tom Allen, Extension Plant Pathologist
By Tom Allen, Extension Plant Pathologist December 29, 2014 17:18

IMG_0589The soybean entries contained in the Mississippi State University OVT (Official Variety Trial) program were rated for their reaction to foliar diseases during the 2014 season at all planted locations (n=10).  Cercospora leaf blight (late-season Cercospora) and frogeye leaf spot were rated at all locations.  The attached files represent the entries contained as Maturity Group V early and late soybean varieties.  At some of the locations, Septoria brown spot was rated simply due to the amount of pressure at each of the locations where the disease occurred (Faulkner and Stoneville (loam)).  A map of the locations where OVT locations were based is included to provide a geographic representation of the specific locations utilized (variety trial locations).  Varieties were planted in three separate replications at each location in either three or four row plots depending on planting pattern and space.  The preliminary yield data from the 2014 season can be located at: http://mafes.msstate.edu/variety-trials/includes/crops/soybeans.asp.

All diseases were rated using a scale of 0-9 where 0=no disease present and 9=severe disease symptoms.  Averages contained at the end of each row, across locations, should not be the sole reason for choosing a variety.  Make sure to consider the performance of the variety across multiple locations since disease severity can greatly differ based on the environmental conditions encountered at each location.

Keep in mind that the highlight, italicized variety entries contain experimental varieties.

Maturity Group V Early Cercospora leaf blight (CLB) ratings (MG V Early Cercospora leaf blight ratings)

Maturity Group V Early Frogeye leaf spot (FLS) ratings (MG V Early Frogeye leaf spot ratings)

Maturity Group V Early Septoria brown spot ratings (MG V Early Septoria brown spot ratings)

Maturity Group V Late Cercospora leaf blight (CLB) ratings (MG V Late Cercospora leaf blight ratings)

Maturity Group V Late Frogeye leaf spot (FLS) ratings (MG V Late Frogeye leaf spot ratings)

Maturity Group V Late Septoria brown spot ratings (MG V Late Septoria brown spot ratings)

 

For the Maturity Group IV trials go to: http://www.mississippi-crops.com/2014/12/02/2014-soybean-variety-trial-disease-ratings-part-ii-maturity-group-iv-varieties/

For the Conventional and LibertyLink trials go to: http://www.mississippi-crops.com/2014/11/25/2014-soybean-variety-trial-disease-ratings-part-i-conventional-and-libertylink-varieties/

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Tom Allen, Extension Plant Pathologist
By Tom Allen, Extension Plant Pathologist December 29, 2014 17:18
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