Abstract Bermudagrass encroachment into seashore paspalum continues to be a concern on golf courses, athletic fields, and other turf areas. Four field experiments were conducted in Georgia during 2000 through 2002 to determine timing, rates, and frequency of chemical treatments needed to suppress bermudagrass and determine tolerance of paspalum. Prograss applied in multiple applications during spring and summer months did not suppress bermudagrass cultivars as effectively as did tank-mixes of Prograss + Cutless. Prograss applied at the X rate [1.7 kg/ha (1.5 lb ai/A)] in four or five applications per year resulted in < 70% bermudagrass suppression on 52% of the rating dates while the injury to paspalum cultivars was > 40% at one-half the dates. Bermudagrass suppression was not consistent throughout the three year period when treated with Prograss + Cutless. However, the suppression was equal to or higher when Prograss + Cutless were applied initially at the ¾ X [1 X= 1.7 + 0.84 kg/ha (1.5 + 0.75 lb ai/A)] and followed by three to four additional ½ X applications during the spring and summer than other rates. By late summer in 2000 and 2001, the suppression of common bermudagrass from the tank-mixed treatments was ≤ 70% more times than either Tifway or TifSport bermudagrass. In some instances, the treatments caused > 40% injury to different paspalum cultivars at sometime during the spring and summer of each year. This was true when the initial ¾ X rate was followed by multiple ½ X rates. By late summer the injury to Sea Isle I was 65% in 2001 but only 40% in 2002. The injury to Sea Isle I during spring and summer was > 40% at 10 of 16 rating dates in 2001, but only once in 2002. In contrast, the injury to Sea Isle 2000 by late summer was 38% in 2001 and 15% in 2002, but did not exceed the 40% anytime either year. Injury to Excalibur also varied from the same Prograss + Cutless treatments and it was > 40% at 11of 16 rating dates in 2001, but did not exceed the 40% at anytime during 2002. Even through injury to paspalum was > 40% from these rates for a number of dates during spring and summer, it was within an acceptable range (≤ 40%) for all cultivars by late summer except Sea Isle I in 2001 (65%). Tank-mixes of Prograss + Primo did not improve bermudagrass suppression when compared with tank-mixes of Prograss + Cutless. The safety of paspalum cultivars to tank-mixes of Prograss + Cutless was not improved with Fe + N compared with Prograss + Cutless alone. All Envoy, Arsenal, Fusilade, and Prograss + Fusilade treatments severely injured (> 70%) all paspalum cultivars and should not be applied to a mixed bermudagrass-paspalum turf for bermudagrass suppression.