News on iron and poa control

The use of iron sulfate programs for poa control on bentgrass greens is gaining in popularity, but there has been little research to investigate the advantages and disadvantages of this approach. Now, researchers at Penn State (Kyung Han and John Kaminski) and Virginia Poly (Nathaniel Reams and Erik Ervin) have begun to answer some of these questions. Key findings include:

- The use of ferrous sulfate at high rates (8 to 16 ounces/1000 square feet), applied every 2 to 3…