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How to Manage Pests

The UC Guide to Healthy Lawns

Special weed problems in lawns

Special weed problems and their associated conditions
Weed species
Associated condition(s)
Management comments
Annual grasses
Annual bluegrass Overwatering; compacted soil Reduce irrigation; aerate
Crabgrass (smooth and large) Overwatering or frequent light watering; mowing too short Water longer and less often; check mowing height
Goosegrass Overwatering; compacted soil Reduce irrigation; aerate
Perennial grasses
Bermudagrass Previous bermudagrass lawn or infestation; close mowing; sun and heat Remove plants before they spread; increase mowing height
Dallisgrass Overwatering; compacted soil Remove plants before they spread; reduce irrigation; aerate
Annual broadleaves
California burclover, black medic Low nitrogen fertility Fertilize
Common knotweed Compacted soil Aerate
Spurges (spotted and prostrate) Closely mowed turf with open areas; low nitrogen fertility Check mowing height; remove plants before they spread
Perennial broadleaves
White clover Low nitrogen fertility Fertilize
Creeping woodsorrel Nearby sources of infestation Remove plants before they spread
Dandelion Poorly maintained thin areas or nearby sources of infestation Remove plants by hand; improve turf management practices
English daisy Moist areas of turf in cool coastal climates Keep turf on dry side; improve turf management practices
Plantains (buckhorn and broadleaf) Overwatering; compacted soil; poorly maintained open turf areas; shaded areas in warm climates Reduce irrigation; aerate; improve turf management practices
Sedges
Green kyllinga Overwatering; poor drainage; sun and heat Reduce irrigation
Nutsedge Overwatering; poor drainage; sun and heat; nearby infestation Reduce irrigation; remove plants before they spread

Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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