Abstract
Roughstalk bluegrass (Poa trivialis L.) and tall fescue [Festuca arundinaceae (L.) Shreb.] are problematic weeds in Kentucky bluegrass (Poa pratensis L.) with limited herbicides for selective control. Field experiments in 2006 and 2007 investigated sulfosulfuron efficacy on these weeds in Kentucky bluegrass. Sulfosulfuron controlled tall fescue ≥ 97% and was similar to sequential chlorsulfuron applications. However, sulfosulfuron was not as injurious to Kentucky bluegrass as sequential chlorsulfuron treatments. Sulfosulfuron controlled roughstalk bluegrass up to 95% with acceptable turf injury (< 20%). Overall, sulfosulfuron appears to have potential for tall fescue and roughstalk bluegrass control in Kentucky bluegrass.
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