https://www.usga.org/content/usga/home-page/course-care/green-section-record/58/8/the-glass-is-half-full-for-mechanical-poa-annua-control.html
Mechanical removal of Poa annua in overseeded turf has proven effective, but the disruption is a deal-breaker for most. One course came up with an alternative...
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https://www.usga.org/content/usga/home-page/course-care/winter-poa-annua-control-the-missing-ingredient-26341.html
Winter Poa Annua Control: The Missing Ingredient
poa annuawintercontrolmissingingredient