=== Elytrigia repens=== {{Argicultural pest | common_name = Couch Grass | latin_name =Elytrigia repens | image =Kweek Elytrigia repens.jpg | range =''Elytrigia repens'' is a very common species of grass native to most of Europe, Asia, and northwest Africa. | description =Other names include twitch, quick grass, quitch grass, dog grass, and quackgrass. It has creeping rhizomes which enable it to grow rapidly across grassland. The stems ('culms') grow to 40–150 cm tall; the leaves are linear, 15–40 cm long and 3–10 mm broad at the base of the plant, with leaves higher on the stems 2–8.5 mm broad. The flower spike is 10–30 cm long, with spikelets 1–2 cm long, 5–7 mm broad and 3 mm thick with three to eight florets. The glumes are 7–12 mm long, usually without an awn or with only a short one. | control =Couch Grass is very difficult to remove from garden environments. One method is to dig deep into the ground in order to remove as much of the grass as possible. The area should then be covered with a thick layer of woodchips. To further prevent re-growth cardboard can be placed underneath the woodchips. The long, white rhizomes will, however, dry out and die if left on the surface. }}
