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Table 5. Suggestions for nonselective control of turfgrass weeds in Pennsylvania, by weed species.

Table 5. Suggestions for nonselective control of turfgrass weeds in Pennsylvania, by weed species.
Weed Material Apply Remarks
Bentgrass Agrostis spp. glyphosate Any time air is warmer than 50°F and rain is not expected within 10 hours after treatment Kills all vegetation in the treated area. If there is no rain within 6 days following first treatment, apply water to encourage sprouting and growth. If regrowth appears, apply second application at three-quarter rate. Prepare seedbed when kill is complete; seeding may begin when seedbed is ready.
Nimblewill Muhlenbergia schreberi glyphosate

Tall Fescue Festuca arundinacea glyphosate

Orchardgrass Dactylis glomerata glyphosate

Quackgrass Agropyron repens glyphosate

Other perennial cool-season grasses glyphosate

Zoysiagrass Zoysia spp. glyphosate When zoysiagrass is actively growing in summer. Zoysiagrass is extremely difficult to control. Repeat applications are usually necessary. Make first application in early summer, then wait a few weeks to see if new growth occurs. If it does, treat again. Continue until no regrowth occurs.