The Riddle of Poa Annua Management: Can it Be Solved?

When is a weed not a weed? When is an annual plant not an annual plant? And when does one species of a grass act like hundreds of different species? These and many other questions frame the dilemma of annual bluegrass (Poa annua), a weed that superintendents and researchers have tried—and mostly failed—to effectively control since the 1920s. In the February, 1996 issue of PACE Insights we concluded that conversion of primarily poa greens to bentgrass was well nigh impossible,…