C3 Poa triv control coming?

Discussion in 'Pesticide & Herbicide Application' started by GroundKprs, Jul 28, 2002.

  1. GroundKprs

    GroundKprs LawnSite Bronze Member
    Messages: 1,969

    Testing has been underway on a new selective control in C3 grasses for annual bluegrass, poa triv, quackgrass and yellow nutsedge. Wouldn't that be a great product?

    Not named yet, known as MON 44951, and won't be out until 2004 at earliest. Testing on bentgrass so far has gotten 70% reduction of poa triv, without unacceptable phyto to bent. Needs multiple apps, and timing and # of apps is still being worked out.

    Purdue also testing TranXit 25 DF on C3 turf. This is a selective P. annua and P. trivialis control used on C4 turf now.
  2. ant

    ant LawnSite Silver Member
    Messages: 2,469

    jim: thanks for the post;;;;
    i hope so.
    it seems that all the lawns that i seeded last fall developed patches of pao triv.
    same seed same lot.

    what is C3 grasses?
  3. GroundKprs

    GroundKprs LawnSite Bronze Member
    Messages: 1,969

    C3 = cool season (northern USA) grasses

    C4 = warm season (southern USA) grasses

    Easier to say and type C3 or C4, instead of cool season or warm season all the time.
  4. agrostis palustris

    agrostis palustris Banned
    Messages: 117

    It has to do with the photosynthetic systems employed by each type of grass. Warm season grasses use both C4 and C3 PSN. Cool season grasses only use C3 PSN.

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