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Aerate before or after pre-emergence app.?

Discussion in 'Pesticide & Herbicide Application' started by Farbio, Mar 5, 2004.

  1. Farbio

    Farbio LawnSite Member
    Posts: 99

    Should I do my aerations before or after I put down dimension 270G this spring. I use the granular products over liquid. I am new to herbicides and was just wondering if this would affect the barrier. Thanks.
  2. James Cormier

    James Cormier LawnSite Bronze Member
    from Ma
    Posts: 1,218

    I would avoid aerations all together in the spring, but if you do you need to aerate first then pre-m.

    I think any chemical has a hard time crossing the aeration hole in the spring so I would recommend doing your normal apps in spring and aerate in late summer early fall
  3. sodzilla

    sodzilla LawnSite Member
    Posts: 219

    The Certified Turfgrass Professional course I'm taking through PLCAA and the Un. of Georgia states that aerating has no signifcant affect on the barrier. Detahtchind does but aerating doesn't. Don't ask me why. But thats what the book said.
  4. envi lawn

    envi lawn LawnSite Member
    Posts: 12

    It seems that aeration should be performed prior to preemergent control as to not disturb the barrier created .
  5. sodzilla is correct,
    but I would aerify before I put down pre emerge if possible, but it isn't necessary!!!
  6. tremor

    tremor LawnSite Bronze Member
    Posts: 1,476

    Agreed. Given the easy (read profitable) choice apply after. But poking aeration holess through the barrier has very little impact on crabgrass control. Get the production done.
  7. mikesturf

    mikesturf LawnSite Senior Member
    Posts: 795

    I took a course on weed control with the U of Illinois. The professor showed us a study that showed no difference if you aerate before or after pre-M. And no, I could not get a copy of the study.
  8. TSM

    TSM LawnSite Senior Member
    from MA
    Posts: 707

    I am also familiar with the studies. However, its been my hands-on experience that you want to aerate first then apply your control.

    I also agree that aeration is best left for the latter part of the season
  9. tsm said "I also agree that aeration is best left for the latter part of the season"

    that is correct for most situations!
  10. James Cormier

    James Cormier LawnSite Bronze Member
    from Ma
    Posts: 1,218

    in my 19 years I ve seen alot of studies that didnt jive with the real world, I believe the Placcca study was saying aerate before prem and results wouldnt be effective.

    Also read the label of any pre m product, it states right on there "Dont disturbe the barrier" To me aeration would disturb the barrier
    Im sorry if my advise comes off as cocky or arrogant, and if anyones is offeneded its not intentional

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