Discussion in 'Pesticide & Herbicide Application' started by RM n WS, Mar 29, 2008.

  1. RM n WS

    RM n WS LawnSite Member
    Messages: 55

    Guys, help me understand the process. When I use pre-m it never seems to do much good. Within 2 weeks of putting it down I always have to spray for broadleafs. Is it not cheaper to fertilize a yard and then spray for broadleafs since I'm going to have to do that anyway? I really don't get it.
  2. redbuckcavs

    redbuckcavs LawnSite Member
    from indiana
    Messages: 135

    Pre-M ---prevents annual grasses(crabgrass,foxtail etc) and a few broadleaf weeds. however it does not kill EXISTING weeds. When you apply this I imagine your getting excellent results preventing problems later in the summer. When you apply this product next week check the lawn for existing weeds and you'll notice they will still be there in a few weeks
  3. cgaengineer

    cgaengineer LawnSite Fanatic
    Messages: 15,778

    You have to put down pre-m before the weeds start actively growing.
  4. grassman177

    grassman177 LawnSite Fanatic
    Messages: 9,795

    the weeds growing now for the most part are winter annuals and can be controlled better either by touching up braodleaf on round one, or applying the pre em as a late fall application to prevent them nest spring. i do the first approach.
  5. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,808

    Pre-em is fine for crabgrass, it does not do much for broadleaf weeds. Controls broadleaf weeds only if the seed is tiny and the Pre-em rate is high.
  6. Atlantic Lawn

    Atlantic Lawn LawnSite Senior Member
    Male, from Outer Banks NC
    Messages: 950

    Gee here we go again, I'm getting tired of all the weed bashing that goes on here. If it weren't for weeds where would we all be ? I love the sight of Broadleaf in the morning......looks like.....like.... Money !
  7. Jason Rose

    Jason Rose LawnSite Fanatic
    Messages: 5,858


    Now, to the OP. When you saw "pre-m" What exact chemical are you talking about? just curious...

    Now most all preemergents applied in the spring for lawns are for "grassy weeds" only. However they may provide some broadleaf control, like spurge with pendimethilin for example. But none are going to prevent dandilions and other normal spring weeds. Most of these weeds germinated in the middle of winter anyway.

    I always have to plan on spraying boradleafs between my first and second round, though if they can WAIT I can use the permagreen and catch then as I fertilize on round 2. This year I unleased a preemptive strike and sprayed 3 way ester and cool power (same thing) and any weeds I saw while I was putting down round 1. I'd like to NEVER see a yellow flower in any of my lawns!
  8. DFLS

    DFLS LawnSite Senior Member
    Messages: 354

    Here we go again with someone not knowing what they are doing. You need a license for this. If he had a license he would not be posting this question. I am surprised that there have been answers posted to this question. :hammerhead:
  9. Runner

    Runner LawnSite Fanatic
    Messages: 13,497

    Unfortunately, this isn't necessarily true. We are seeing an influx in states that as long a you can read and write, you are good to go. Answer a few questions about putting the lid on straight, and bada bing, you got a license.
    RM n WS, this is NOT directed at you, ^ and please don't take it wrong, or take it as that. The fact that you are asking questions is a good thing. Some careful research will certainly benefit you as well. Even studying the labels of these products gives you alot of info.
  10. Frank Fescue

    Frank Fescue LawnSite Senior Member
    Messages: 713



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