Ryegrass - Annual

Lolium multiflorum
Annual ryegrass (Lolium multiflorum) is an important cultivated grass species which becomes a very competitive weed when growing in cultivated crops. Generally germinating at the same time as the crop it grows quickly and competes aggressively for space, light, nutrients and water. Uncontrolled annual ryegrass will significantly reduce yields. To identify look for young plants between the crop rows, young plants are upright and the leaves have prominent veins. As plants get bigger the leaves are shiny underneath and these stand out, especially on breezy days. Later, when in ear look at the seedhead as ryegrasses have one edge of the seed against the axis which means the flat side of the seed is visible.
Annual Ryegrass