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Crabgrass vs Drive XLR8

Discussion in 'Pesticide & Herbicide Application' started by carbpow, Nov 10, 2012.

  1. carbpow

    carbpow LawnSite Member
    Messages: 35

    I have applied Drive XLR8 4 times over the last couple of months on the same crabgrass. It seems to stunt its growth but it sure isn't killing it. I use the recommended label rate and sticker. I make sure it's been at least two days since mowing and wait at least 3 days before mowing. Irrigation is controlled to prevent washing it off the first day or so and then normal irrigation resumes. I even mixed a tracker last time to make sure I was hitting it good. Anybody else had this problem? Is there some kind of bad crabgrass in S. Florida that resists this stuff?
  2. greendoctor

    greendoctor LawnSite Fanatic
    Messages: 9,994

    If you are in Florida, that might not be crabgrass. If you are working in bermuda or zoysia, Revolver, Monument or Celsius might do better.
  3. Dave Stuart

    Dave Stuart LawnSite Member
    Messages: 98

    The efficacy of Quinclorac (drive) really depends on timing with the plants life cycle.
    Research at Rutgers University here in NJ over the past 10 yrs since the inception of the material shows that from the 4 leaf to about the 5th tiller stage /early best efficacy is achieved /after 5 tillers the plant becomes too large and puts most of its energy toward seed production as it increases in size. As long as water is available for good uptake the 5 tiller control can be reached, if there is minimal water for uptake than usually the result is at 3 tillers.

    When inflorescence (seed) finally pushes out the plant starts to reach the end of its life cycle and at that time Drive is effective again and will take it down all the way to the crown.

    I have used this very research and it has been pinpoint time and again, in the mid stage when there are multiple tiller ( coffee can lid size ) plants Acclaim Extra ( phenoxaprop ) works the best for post control.

    A strategy I use here in the north:

    March 15 - April 20 / Barricade at .5 lb ai/a (Pre)
    April 20 - May 31st / Dimension at .4 lb ai/a (Pre-post)
    May 31st - June 20th / Drive at 1lb ai/a (post)
    June 20 - August 15 / Acclaim at 28 oz /a (post)
    August 15- mid sept / Drive at 1 lb/a (post)

  4. greendoctor

    greendoctor LawnSite Fanatic
    Messages: 9,994

    That is a mean program for cool season turf. In warm season turf, Acclaim Extra(fenoxaprop) is best used on zoysia, it destroys all other warm season grasses.
  5. Dave Stuart

    Dave Stuart LawnSite Member
    Messages: 98

    Hey Green -

    Ya, seems to work real well ( expensive ) but effective. Here in the north east the summers have become more extreme and crabgrass pressure is high

  6. greendoctor

    greendoctor LawnSite Fanatic
    Messages: 9,994

    Cheaper than losing clients to weed control failures. I have had to use more preemergents than in the past. Mostly because the new postemergent herbicides have severe annual usage limits. Gone are the days of spraying MSMA when desired.
  7. Dave Stuart

    Dave Stuart LawnSite Member
    Messages: 98

    I hear you on that, MSMA was some product.....

    There are still some small quantities here in NJ, eastern PA.

    I used a little this year for Dallisgrass.

  8. carbpow

    carbpow LawnSite Member
    Messages: 35

    I'll give Acclaim Extra a shot. Will report back.
  9. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,715

    Drive worked fine for me in a couple of tests in late summer. Be sure you are applying the full amount--and include spreader sticker or Mso.
  10. GreenerSolution

    GreenerSolution LawnSite Member
    from PA
    Messages: 84

    Dave, i am in your region as well. Southeastern PA. We have had issues with crabgrass also. Acclaim works decent. but you def. have to pay a pretty penny for it. Where do you get your products from?

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