Weed Hotline Issue 4


Large crabgrass. Photo by: Richard Old, XID Services, Inc., Bugwood.org.

Goosegrass. Photo by: Joseph M. DiTomaso, University of California – Davis, Bugwood.org.

Goosegrass plants. Photo by: Joseph M. DiTomaso, University of California – Davis, Bugwood.org.

Goosegrass flowers. Photo by: Richard Old, XID Services, Inc., Bugwood.org.

Nimblewill. Photo by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org.

Nimblewill roots and stolons. Photo by: Joseph M. DiTomaso, University of California – Davis, Bugwood.org.

Weed Hotline Issue 19

White clover, an indicator of low mowing height and low fertility soil.

Spurge, an indicator of compacted soil.

Prostrate knotweed, an indicator of compaction.

Red Sorrel, an indicator of low pH, low fertility soil or dry soil.

Plantain, an indicator of low fertility soil.

Nutsedge and Oxalis (woodsorrel), indicators of wet soil.

Nimblewill, an indicator of excess shade.

Goosegrass, an indicator of compacted soil.

Crabgrass, an indicator of low mower height, wet soils, or high fertility.
Carpetweed, an indicator of dry soil.

Black Medic, an indicator of dry soil.

Bermudagrass (wiregrass), an indicator of low mowing height, compaction, or high fertility.

All Weed Pictures by Gordon Johnson, Extension Agent, Agriculture and Commercial Horticulture, University of Delaware, Kent County

Weed Hotline Issue 18

Bermudagrass control experiment with glyphosate and Basamid

Nimblewill control experiment with glyphosate and Basamid

Nimblewill control in fall with glyphosate (Roundup) and Basamid

Basamid application uniformity is key when not tarped.

All slides from a presentation by Shawn Askew, Extension Turfgrass Weed Scientist, Virginia Tech.