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herbicides, broadleaf on new grass

Discussion in 'Pesticide & Herbicide Application' started by RigglePLC, Apr 15, 2012.

  1. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,553

    New grass left over from a seed pre-soak test was sprayed with 4 different post emergent broadleaf herbicides. Seed was planted inside on March 17, 2012. It was treated April 4 when about 20 days old, at about 2 inches tall. Grass was moved outside when weather was warm. Photo on April 14.

    T-Zone slight injury
    Speedzone slight injury
    Surge slight injury
    Quciksilver mediuim injury

    I saw some browning or necrosis in bands across the leaf blade or at the tip in a few of the affected grass blades. I suppose this was the sensitive area of most rapid growth. If you look closely you may see some grass blades have bent over or collapsed due to browning of the sensitive area.

    S3500017.jpg
     

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