weeds in bermuda grass, The weeds are up with little purple flowers and etc.

Shirley R
by Shirley R
I sprayed the lawn with Image a week ago this Tuesday and instructions said to water with in 1-7 days, we got rain so I did not need to water. The weeds are still there and it is driving me nuts. I even put a bag of pre-emergent down that got rain.. So should I cut the lawn down with it brown to clean up some of the thach and get rid of the tall weeds or what??? Help me out please. Thanks
  4 answers
  • Douglas Hunt Douglas Hunt on Mar 09, 2012
    Shirley, check the label on your bag of Image for when you can mow after applying. You want to make sure to give the herbicide time to be effective. Pre-emergents do not work on weeds you can already see; they suppress the germination of seeds.
  • Southern Trillium LLC Southern Trillium LLC on Mar 09, 2012
    I believe the weed you are seeing is called Henbit . http://www.ppws.vt.edu/scott/weed_id/lamam.htm Which Image product did you use, as they produce several types? Did you use the one for Nutsedge as the label says it should provide post-emergence control for Henbit, it may just take more time. As to the pre-emergent that you spread, it will have no affect on the current growth of Henbit. Pre-emergent chemicals only provide a chemical barrier to prevent new seeds from germinating. You will need to continue with a pre-emergent application for several years, applied each fall in order to keep the henbit from reappearing. I know Walter Reeves can correct or verify my next statement, but I believe Henbit seeds can remain viable in the soil for several years. This means that a seed can sit for possibly 3 years and still germinate. So you will have to continue with your pre-emergent chemical application each fall to reduce the future growth of Henbit. Pre-emergent applications done in late winter/early spring are to control summer weeds, and most importantly crabgrass.
  • 360 Sod (Donna Dixson) 360 Sod (Donna Dixson) on Mar 09, 2012
    If you got out to the yard after a rain such as we just had, henbit is amazingly easy to pull out with the roots intact. You will also be ridding yourself of future seeds with some old fashioned hand weed pulling, as well as not spending money and adding more chemicals to the globe. 15 minutes a day if you are a busy person and pretty soon you will have it all pulled out!
  • Walter Reeves Walter Reeves on Mar 09, 2012
    Henbit is a great contributor to your "soil seed bank". They can indeed lie in wait for years and will germinate when ready to do so. This is why "early and often" weed control is so important!