Showing archived posts for: March 2017


Weeds of the Week: Sweet Vernalgrass and Annual Bluegrass in Lawns, Roughs and Sod Fields

Posted by admin on March 30, 2017

Peter H. Dernoeden, Ph.D Sweet vernalgrass (Anthoxanthum odoratum) is found mostly in pastures, roadsides and ditch banks. In transition areas of the mid-Atlantic, and especially on the Delmarva Peninsula, it has found its way into fall seeded stands, lawns, golf roughs and sod fields. It seems likely that vernalgrass… Read More

Weeds of the Week: Knawel and Prostrate Knotweed

Posted by admin on March 23, 2017

Peter H. Dernoeden, Ph.D Knawel (Scleranthus annuus) also is known as German knotweed.  It is a winter annual that has a grass-like appearance. Knawel is mostly found in areas where there is little turf competition or where soil has been disturbed. Its grass-like appearance enables it to become… Read More

Weeds of the Week: Slender and Corn Speedwell

Posted by admin on March 16, 2017

Peter H. Dernoeden, Ph. D. Slender speedwell (Veronica filiformis), also known as creeping speedwell or creeping veronica, is a perennial that produces an abundance of light blue flowers in late winter and early spring. It grows in sun and shade, but is most dominant in open and sunny locations.Corn… Read More

Weeds of the Week: Hairy Bittercress and Common Groundsel

Posted by admin on March 9, 2017

Peter H. Dernoeden, Ph. D. March is the time when winter annuals (i.e., weeds emerging in fall, flower in spring, and die by early summer) spring into their full glory. Some are competitive, while others are merely objectionable or just curiosity plants. Hairy bittercress (Cardamine hirsuta) and common groundsel … Read More