Dimension on new seed

Discussion in 'Pesticide & Herbicide Application' started by RigglePLC, Aug 25, 2011.

  1. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,808

    How soon can you treat new grass that you might seed this fall or next spring to prevent crabgrass in the same season?

    The label is always right, (but it may be too conservative). As a preliminary test, I applied Dimension (Shaws 23-0-8 with 0.13% dithiopyr) on seed that was planted August 9th 2011. Grass seedlings were about 2 inches tall, and they were 9 days old, (Scotts "High Traffic" seed). I counted the pellets in a sample and used 14 pellets per flower pot as an estimate of 4 pounds per thousand sqft.

    The result was: the seedlings were not killed, but slightly stunted. I will have more information later.
  2. TLS

    TLS LawnSite Fanatic
    Messages: 7,943

    The label is always the law, but it is ALWAYS conservative!

    I think this test will depend more on soil moisture and growing conditions.
  3. Smallaxe

    Smallaxe LawnSite Fanatic
    Messages: 10,082

    Stunting new seedlings is never a good idea, unless of course it is necessary...
  4. jbturf

    jbturf LawnSite Bronze Member
    Messages: 1,503

    interesting riggle,

    but i have to ? conservative, especially after the imprelis issue this year

    i guess there really is no substitute for 1st hand experience

    i have some tenacity trials on seedlings at my house i should post,
    but will save for another thread
  5. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,808

    Yes, JB, tell us about Tenacity!

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