Dollar spot disease cycle. Varieties of bluegrasses and fescues differ in susceptibility to dollar spot. Bluegrasses which exhibit greater resistance include the improved varieties Adelphi, America, Aquila, Bonnieblue, Bristol, Eclipse, Midnight, Touchdown, Vantage, and Victa. Greater susceptibility is exhibited by varieties which include Ram I, Mystic, Estar, Gnome, and Pennstar. Fescues which are more resistant include Jamestown, Agram, Checker, and Shadow chewings, Biljart, Reliant, Scaldis, and Tournament hard fescues.
Many fungicides are available for dollar spot management.
They include systemic fungicides containing the active ingredients benomyl, thiophanate, iprodione, or triadimefon, and the protectant fungicides containing anilazine, chlorothalonil, or thiram. The systemics should be drenched into the turf for longer lasting control. Foliar protectants must be reapplied as the product label recommends. This publication contains pesticide recommendations. Changes in pesticide regulations occur constantly, some materials mentioned may no longer be available, and some uses may no longer be legal.