Dormancy

    Annual Ryegrass

    Lolium multiflorum

    Annual Ryegrass

    Annual ryegrass (Harry Rose, Flickr.com)

    Annual Ryegrass

    Annual ryegrass clasping auricles (Syngenta Lda., Flickr.com)

    Annual Ryegrass

    Annual ryegrass seed heads (Harry Rose, Flickr.com)

    Description

    • bunching growth habit growing 1 – 2 1/2 feet tall; clasping auricles
    • leaves rolled in the bud; dark green with prominent veins

    Location

    • landscape, roadsides, open spaces and occasionally lawns
    • commonly planted in agricultural fields for weed suppression and included in lawn seed mixes as a temporary quick-establishing grass

    Life Cycle

    •  annual germination in late summer and fall

    IPM Recommendations

    • Frequently hand-pull aboveground structures prior to seed maturation to prevent re-seeding.
    • Apply an appropriate pre-emergent herbicide prior to seed germination.