What pre-emergent to use?

Discussion in 'Pesticide & Herbicide Application' started by TC Lawns, Feb 5, 2009.

  1. TC Lawns

    TC Lawns LawnSite Member
    Posts: 57

    I need some advise on what kind of pre emergent to use for grabgrass. The yard is bermuda. I live in Alabama, so it get warm earlier. What kind should I use? And when is the best time to do it?

    Thanks
     
  2. Think Green

    Think Green LawnSite Silver Member
    Posts: 2,746

    Google the products
    Pendimethalin! (Pre-M) Stinks--messy as all get out--stains some concrete!
    Prodiamine (Barricade) No odor--less messy--costs sufficiently more--works longer.

    The time to use a preemerge for crabgrass is when the soil temps are at around 55 degrees consistantly for days. The depth of temperature consistancy is usually 6" deep. The seeds will germinate rapidly at this temp.

    Read these labels for your grass type. Rates apply to soil types and weed pressure.
     
  3. TC Lawns

    TC Lawns LawnSite Member
    Posts: 57

    he also wants the yard aerated and top dressed with compost and sand......pre m before or after I do this, or does it matter?
     

  4. The time to use a preemerge for crabgrass is when the soil temps are at around 55 degrees consistantly for days. The depth of temperature consistancy is usually 6" deep. The seeds will germinate rapidly at this temp.

    Actually, measure the soil temp at sunrise, crab will germinate after soil temp at 3" depth is 55 degrees for 3 consecutive days, assuming their is adequate soil moisture. Goose will require temp of 60 degrees
     
  5. bx24

    bx24 LawnSite Senior Member
    from MA/TX
    Posts: 503


    I love the smell of Pre-M :)
     
  6. Think Green

    Think Green LawnSite Silver Member
    Posts: 2,746

    TimTurf,
    Thank you for giving more information to the original question. I was in a bit of a hurry when I posted to the reader.

    TCLawns,
    There is quite a bit of speculation as to the ideal way for coring the soil while using preemerge, however, I will say that from our Greenskeepers here in the Delta, they do it after the coring is done. Breaking the weed control barrier will cause outbreaks from the core pellets.
     
  7. ted putnam

    ted putnam LawnSite Platinum Member
    Posts: 4,530

    I'll bet you like the smell of moth balls too. On warm days they smell similar. After 18 years, I liked it so much I started using Prodiamine. :)
     

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