Missed window for Pre-M

Discussion in 'Pesticide & Herbicide Application' started by xtremelawn, Feb 11, 2009.

  1. xtremelawn

    xtremelawn LawnSite Member
    from USA
    Messages: 110

    I was talking to my lesco rep yesterday about my Crabgrass apps. He has me using Aquacap doing split apps. I know the timing of these treatments are based on soil temp. He is telling me I should have started my first treatment 2 or 3 weeks ago. He is convinced I have missed the window. He is making it sound like my yards will be infested with Crabgrass since I am just now starting my apps. Most of my yards, I have had for 2 to 3 years. Most of them had no Crabgrass at the end of last season. Do I need to be worried about my yards being infested with Crabgrass?

  2. grassman177

    grassman177 LawnSite Fanatic
    Messages: 9,795

    it is possible, use two apps full strength dimension instead. although i am not from that far south, in theory this shoudl serve the purpose well as it has small post control properties. good luck
  3. cod8825

    cod8825 LawnSite Senior Member
    Messages: 501

    I agree with grassman and your right is all about soil temps in the KC area they say that you should get your pre-m by April 15 but it can be earlier or later as it is tied to tempatures. Go and get a soil probe and find out. If you can't afford that I sometimes have used a meat thermometer in the past. Hope this helps. Use Dimension as well better for the grass.

  4. ICT Bill

    ICT Bill LawnSite Platinum Member
    Messages: 4,115

    Yeah we have had several calls from folks in south Texas that normally begin applying pre-m qorund the 15th of Feb but this year the soils were over 50 degrees 2 or 3 weeks ago. Very early spring

    You should be good on sites that you used pre-m on last year, the sites that you core aerated will probably have some issues though and of course new sites that you had no control over last year

    I think I would find another fert sales guy one that works with you rather than putting so much doubt in your mind
  5. okcfire

    okcfire LawnSite Member
    Messages: 9

    Your guy is an idiot who went to one sales rep class I bet.

    All kinds of factors come into play but the soil temp is a target to get your pre m down by so that it can keep the crab from getting started.

    Did your mother tell you not to cry over spilt milk. It is what it is etc.

    Go spray and if crab comes treat it. Get thick grass coming in so that crab cannot compete with it.

    You are in this for the long haul not to get one app done in one week.
  6. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,669

    Are your farmers planting corn? If not, its probably early.
    Frost sensitive crops like corn are planted about the time crabgrass sprouts. Up here in Mich we like to be finished with our crabgrass control before the air temp hits 80.(About May 10th). Frost kills crabgrass. Also, I figure that we see crabgrass sprouting when the Growing Degree Days (base 32) hit about 500 to a thousand. Talk to your experts at TAMU. They should have an opinion on this. They should be able to give you data on the GDD, and the GDD from past years. Keep looking; you should be able to find this on the internet. (I gave up after 5 minutes).
  7. garydale

    garydale LawnSite Senior Member
    Messages: 813

    Switch to Dimesion forpost emergent control.
    The corn advice is good.
    Also if Dogwood hasn't bloomed you will be OK. IMHO
    Buy and use a soil thermometer.
  8. hmartin

    hmartin LawnSite Senior Member
    Messages: 590

    On bermuda lawns that were really good last year, I wouldn't worry about it. You could even skip the pre-m and spray MSMA twice in the summer and have it looking great.

    Go ahead with the aqua cap and don't worry.

    Split treatments are mainly a waste of time. Put out the full rate of aquacap out now and save yourself some trouble on the next round. This might mean a little spot spraying next round instead of a blanket app.
    Last edited: Feb 11, 2009
  9. quiet

    quiet LawnSite Senior Member
    Messages: 720

    You didn't miss the window. Your average last frost date is still about a month away.
  10. Turf Dawg

    Turf Dawg LawnSite Gold Member
    Messages: 3,719

    Same thing I was thinking. Besides the "old timers" always say if it thunders in Feb it will freeze in April. Well last night we had thunder {besides the bad stuff}.

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