1. Selective control of bentgrass can be very difficult and will require three consecutive applications of a specialty herbicide in August/September. These applications are spaced two weeks apart and we typically recommend the lawn be overseeded immediately prior to the final application. This program will generally provide approximately 90% control and will likely require follow-up applications in subsequent years to maintain control. These applications will cause the bentgrass to turn white and are also effective on nimblewill. Website:-https://www.emeraldlawncareinc.com/ Contact Us Emerald Lawn Care Inc. 3890 Industrial Ave. Rolling Meadows Illinois 60008 United States (847) 392-7097