Summer Disease Update
January 4, 2004
Summary: Increasing soil manganese levels to 30 - 45 ppm (Mehlich III) can help reduce the severity of take-all patch, especially in soils where pHs of over 6.0 occur. For severe symptoms, application of fungicides such as azoxystrobin, pyraclostrobin, propiconazole, thiophanate-methyl or triadimefon may still be necessary, however.
In addition to the manganese and iron applications described above for take-all patch, severe bermudagrass decline infestations can be knocked down with an application of thiophanate methyl (e.g. 8 oz/1000 sq ft…