Diseases and Weeds - Your Online Help Source. . . Use these helpful links to assist in handling your turfgrass management needs. . . Disease Guide Syngenta's Professional Products Online Turfgrass Disease Identification Guide Weed Guide PBI Gordon's Online Weed Identification Guide Thanks for choosing us to help identify your turfgrass disease and weed problems. Please e-mail us or call at (800) 476-4504 for quality products to assist in solving your needs.