URI Plant Protection Clinic
CE Education Center
3 East Alumni Avenue
Kingston, RI 02881
Tel: 401.874.2900
Fax: 401.874.2259
Take a 6" square and 2" deep sample from an advancing margin of the problem patch. Wrap tightly in newspaper and then in foil or polyethylene, taking care to keep soil off the grass. Mail in a tightly-fitting box.