Chad Lee, University of Kentucky
Email: Chad Lee
There have been some news articles about interactions between glyphosate and manganese (Mn). Other articles discuss possible links between glyphosate and plant diseases.
Bob Hartzler at Iowa State does an excellent job of summarizing the current scientific research on the subject. His summary can be found at: http://www.weeds.iastate.edu/mgmt/2010/glyMndisease.pdf
As Dr. Hartzler states that the proposed manganese deficiency from glyphosate applications does not appear to hurt yields, and nor does a subsequent foliar Mn increase yields. On the disease issue, some interactions have been documented in the greenhouse, but nothing consistent has been reported in the field. In some cases, such as Sudden Death Syndrome (SDS), soybean variety appears to be much more important than whether or not glyphosate was applied.
Email: Chad Lee
There have been some news articles about interactions between glyphosate and manganese (Mn). Other articles discuss possible links between glyphosate and plant diseases.
Bob Hartzler at Iowa State does an excellent job of summarizing the current scientific research on the subject. His summary can be found at: http://www.weeds.iastate.edu/mgmt/2010/glyMndisease.pdf
As Dr. Hartzler states that the proposed manganese deficiency from glyphosate applications does not appear to hurt yields, and nor does a subsequent foliar Mn increase yields. On the disease issue, some interactions have been documented in the greenhouse, but nothing consistent has been reported in the field. In some cases, such as Sudden Death Syndrome (SDS), soybean variety appears to be much more important than whether or not glyphosate was applied.
