University of Maryland Extension

Knawel - German Moss

Knawel

(More lawn weeds)  (Control Options)  (General Weed Gallery)

Lifecycle:
Annual, summer or winter
Growth habit: low-growing, can blend into established lawns unnoticed. Has wiry, grass-like appearance. Sometimes forms sprawling mats. Inconspicuous flowers
Reproduction: Seed germination mainly in spring but can occur later in the season
Conditions that favor growth: dry, sandy, infertile soil 

Cultural control: Maintain healthy, dense turf that can compete and prevent weed establishment.
Mechanical control: Hand pulling or using an appropriate weeding tool are the primary means of mechanical weed control in lawns. This is a viable option at the beginning of an infestation and on young weeds. Hand pulling when the soil is moist makes the task easier. Weeds with tap roots like dandelions or have a basal rosette (leaves clustered close to the ground) like plantain are easier to pull than weeds such as Bermudagrass (wiregrass) or creeping Charlie (ground ivy) that spread with stolons or creeping stems that root along the ground.
General chemical control: (lawns) Spot treat weeds with a liquid, selective, postemergent, broadleaf weed killer applied when weeds are actively growing. Look for a combination product with the following active ingredients:
2, 4-DMCPP (mecoprop), Dicamba (be careful when using around tree and shrub roots).

Organic control:

For a glossary of herbicide terms and additional information see: control options 

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