St. Augustine grass is over run

Discussion in 'Pesticide & Herbicide Application' started by txadam, Feb 7, 2009.

  1. txadam

    txadam LawnSite Member
    Posts: 5

    My St. Augustine lawn is getting overrun by all these damn weeds. I do not know what to do to get rid of this. I pretty much cant see anymore grass.

    Some back story. After Hurricane Ike, our fence was destroyed and knocked down. It was down for several weeks since we were behind on getting it fixed. Behind our house is a green belt with a bayou about 50 yards away. I'm thinking that wind blew weed seeds and what not into my back yard. This is my best assumption.

    I took some photos of the weeds. Can anyone help me out and give advice on what I can do to get rid of these and bring back my lovely grass :confused: Do I need to kill the grass and reseed, Do I need to sod the back yard? I dont know

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  2. Ric

    Ric LawnSite Fanatic
    Posts: 11,956

    txadam

    To my knowledge about Texas, all the good herbicides for St Augustine are Restricted Use and can not be purchased by homeowner. My advice is to hire a reputable Lawn Care Company that has both access to good chemicals and the knowledge to apply them.
     
  3. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,110

    White flowers, chickweed. Purple flowers, henbit. Both are winter annuals--start in fall--bloom in spring--go to seed and die when temps hit about 85. I know nothing about ST Augustine, but you may need to treat in the fall for best results.
     
  4. txadam

    txadam LawnSite Member
    Posts: 5

    anyone else have any input?
     
  5. ted putnam

    ted putnam LawnSite Platinum Member
    Posts: 4,539

    Riggle's right. Mowing will help and even kill some of it and you can kill what is left with post emergence weed control. Problem is, the seed that has been produced already will germinate when the time is right. So, to achieve the best results and not have to deal with the problem year after year, apply pre-emergence in the Fall and then again in the Spring. Doing this will minimize weed problems greatly.
     
  6. ted putnam

    ted putnam LawnSite Platinum Member
    Posts: 4,539

    No need to sod or reseed. They are just cool season weeds that will compete with the St.Aug during Spring greenup. Like Riggle said, they'll die with warmer temps. Apply pre-emergence to prevent this problem in the future. Good Luck
     
  7. greendoctor

    greendoctor LawnSite Fanatic
    Posts: 9,062

    One of the preemergents for use on st augustine is atrazine. This should be applied in the winter and/or early spring. If you are a homeowner it is available as a 4% concentrate to be sprayed evenly over the entire lawn. BTW, how big is the lawn? Anything over a few 1000 sq ft is best treated by a pro, unless you have a boom sprayer.
     
  8. txadam

    txadam LawnSite Member
    Posts: 5

    Well, my yard is pretty huge! I would say that 1000sqft is on the smaller range of my backyard. Is a post emergence harmful to pets? I have 2 small dogs..

    Edit. My whole lot is 7200 sqft and I would say my backyard is a good portion of that, maybe 2000sqft.
     
  9. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,110

    Follow weed control label directions carefully. If it doesn't say keep dogs off-relax. However, most pet owners like to be careful--follow the directions for humans. Hope this helps.
     
  10. txadam

    txadam LawnSite Member
    Posts: 5

    that helps just fine, thanks! I will look into some post emergence care this weekend and MOW!!! I still have some left over fencing from hurricane ike that I need to dispose of, thanks.
     

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