1. Missed the live Ask the Expert event?
    Not to worry. Check out the archived thread of the Q&A with Ken Hutcheson, President of U.S. Lawns, and the LawnSite community on the Franchising Forum.

    Dismiss Notice

Bermuda Lawns turning yellow

Discussion in 'Fertilizer Application' started by Fubba, May 30, 2014.

  1. Fubba

    Fubba LawnSite Senior Member
    Posts: 356

    Yesterday I applied this mix at 3 gpm:
    1 lb per 1,000 sq ft of N from Ammonium Sulfate
    Celsius at 0.085 oz per 1,000 sq ft
    A light NIS at 0.125% solution.

    Highs were almost 90. Started spraying around 10:00 and finished around 2 before doing maintenance.

    Any idea what was wrong? I'm positive on all my numbers. Went by and turned all irrigation on this evening. I'm very concerned.
    Posted via Mobile Device
     
  2. Firefighter337

    Firefighter337 LawnSite Senior Member
    Posts: 373

    Could be the herbicide at close to 90* Celsius in my experience can be pretty harsh at higher temps.

    We have had some pretty warm days consecutively.

    I think it should recover after some rain or water.
    Posted via Mobile Device
     
  3. Firefighter337

    Firefighter337 LawnSite Senior Member
    Posts: 373

  4. Fubba

    Fubba LawnSite Senior Member
    Posts: 356

    Thanks for the quick replies. That must have been it.
    Posted via Mobile Device
     
  5. Firefighter337

    Firefighter337 LawnSite Senior Member
    Posts: 373

    Good luck. I worry to death over things like this too. I fried my back yard last summer experimenting with msm @ labelled rate near 90* bahia died though.

    I dont spray anymore if the highs reach 85* anymore unless its gly in beds.
    Posted via Mobile Device
     
  6. greendoctor

    greendoctor LawnSite Fanatic
    Posts: 8,802

    The Celsius is fine. You never ever put any kind of surfactant in a liquid fertilizer application. That is why I only put preemergents needing to be watered in with fertilizer. If the grass turns off color that soon after an application, it is fertilizer. Problems with Celsius normally take 10-14 days to show up. 1 lb of N from ammonium sulfate in 3 gallons is way hotter than what I will mix if the lawn is not being sprayed after and right before an irrigation cycle. Doing any of this on a non irrigated lawn means the fertilizer is applied at no more than 1 lb of N per 10 gallons of water. My mixes break that rule because I do not co apply any postemergents and this is being done right between irrigation cycles. Especially if I am applying on a day that is almost 90 and humid.
     
  7. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 11,768

    Green is right. If it happened right away it is fertilizer burn--usually. You applied way in excess of safe amount of nitrogen as a quick-release all mineral product. At 90 degrees I would apply no more than a half or quarter pound of nitrogen.
    Surfactant is fine with liquid fert--in my experience.
     

Share This Page