Yellowing on Centipede

Discussion in 'Pesticide & Herbicide Application' started by greenman2012, Apr 28, 2013.

  1. greenman2012

    greenman2012 LawnSite Member
    Posts: 2

    I'm seeing some extensive yellowing on centipede that I treated with 0.5 o/k prodiamine and 0.7 o/k 3-way on March 15. Will the turf die, or is this just temporary? I put 1 lb of N on it today? Is there anything else that needs to be done to ensure that this turf comes back?
     
  2. Ben Harris

    Ben Harris LawnSite Member
    Posts: 52

    fertilization March-May Centipede
    DO NOT apply nitrogen at this time. Yellow appearance may be an indication of iron deficiency. Spray iron (ferrous) sulfate (2 ounces in water per 1,000 sq. ft.) or a chelated iron source to enhance color as needed. Follow label directions.

    This is from NC State website.
     
  3. RAlmaroad

    RAlmaroad LawnSite Silver Member
    from SC
    Posts: 2,182

    Almost all 3-ways including whatever you used will harm centipede. Water water water and hope that you can leach some of it out of the root system. However, the uptake is already done. You'll have to wait and see. Who informed you that it was OK to use any three way on centipede. Please read through the mountain of related stuff on here by Greendoctor or myself before using anything and especially the fertilizer programs. I'm not an expert but have dealt with it for many years.
     
  4. LawnsharkMB

    LawnsharkMB LawnSite Senior Member
    Posts: 582

    The 1lb of N you just put out will most likely cause some yellowing of its own. I don't know what part of the country you're in but here in Myrtle Beach temps are still in the low 70's for the high and getting down in the high 50's at night. Still too early to be putting down nitrogen.
    Posted via Mobile Device
     
  5. greenman2012

    greenman2012 LawnSite Member
    Posts: 2

    The product that I used was a JDL(Lesco) 3-Way. It's labeled for centipede at 0.7/k. I double-checked my tank usage after this app to make sure that I didn't overspray the property. Everything looked good.
     
  6. windflower

    windflower LawnSite Bronze Member
    Posts: 1,080

    Centipede is more sensitive than usual when it is coming out of dormancy. Best not to apply anything at that time. I've never tried it but Jerry Baker would recommend a source of sugar (like coke) in this situation. I guess my age is showing here.
     
  7. greendoctor

    greendoctor LawnSite Fanatic
    Posts: 9,059

    The lowest rate of Three Way amine is usually enough to damage centipede and St Augustine, but not enough to kill weeds. No one ever pressures me to apply during less than optimal conditions. These same people are also not likely to swallow having to re plant a killed lawn. You, the applicator are on the hook. If it is abnormally cold, cloudy, grass is not actively growing, no herbicides on centipede. What was in that fertilizer that you applied at 1 lb of N? If the potassium was from potassium chloride and the N from urea, that is a problem already. Centipede likes fertilizer, however not from urea or potassium chloride and no phosphorus. When centipede turns purple, that is not phosphorus deficiency like other grasses, that is potassium deficiency. Yellowing is from either iron deficiency or herbicide intolerance.
     

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