herbicide test

Discussion in 'Pesticide & Herbicide Application' started by RigglePLC, Jan 13, 2013.

  1. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 11,784

    I dug up some clumps of winter annual weeds and moved clumps indoors in cups in potting soil and allowed two weeks for growth to resume. I then sprayed them with one of five herbicides and kept an untreated control. Best control was produced by Speedzone and T-Zone which were very similar, next was Quicksilver, next were a 3-way and Drive which were almost equal. Untreated control looked healthy. Photo at 4 days after treatment.

    Mysterious, this was an area infested with chickweed last year, and I thought this was young chickweed. Now I am thinking it is not chickweed--the leaves are really small. Does anyone know what kind of weed it is?

    S3500011.jpg
     
  2. TurfWerks

    TurfWerks LawnSite Senior Member
    Posts: 309

    Parsley? I can't see well on my phone..
    Posted via Mobile Device
     
  3. Ferris68

    Ferris68 LawnSite Member
    Posts: 44

    Thats an interesting test. Thanks for posting. I am curious as to what the cost difference would be if you mixed 3/4-1oz per Acre of Quicksilver with a cheap three-way versus the SpeedZone.

    My guess on the weed is Henbit. But its a bit difficult to tell from the picture.
     
  4. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 11,784

    A followup: T-Zone was best; Speedzone almost as effective, followed by Quciksilver, 3-Way and Drive. I am still not sure about the species of weed.
     
  5. noweedshere

    noweedshere LawnSite Member
    Posts: 45

    Guessing either a bedstraw or a speedwell variety. Any flowers?
     
  6. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 11,784

  7. noweedshere

    noweedshere LawnSite Member
    Posts: 45

    Speedwell has been a glowingly noticeable problem here in ohio past few years. Seems to have prospered from warmer/earlier than usual springs. Seeing mostly corn speedwell here with the blue-purple flower come spring.
     
  8. 44DCNF

    44DCNF LawnSite Bronze Member
    Posts: 1,459

    Could it be a thyme?
     
  9. noweedshere

    noweedshere LawnSite Member
    Posts: 45

    Thyme leaf speedwell, also a variety
     
  10. Ijustwantausername

    Ijustwantausername LawnSite Bronze Member
    Posts: 1,437

    Thanks for this, will be switching to t-zone this year.
     

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