I had an odd occurrence when I last sprayed the "winter cocktail". Some areas I spot treated turned brown.....like almost Round up brown. Yet most areas sprayed, everything was fine. Has this happened to anyone else? I can't figure out exactly what happened.

My mixing ratios were ok (not my first time doing this) and the day I sprayed it was mild. No cross contamination with Round up as I use a dedicated sprayer for glyphosate.

Really really weird.

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Posted by TheWiz

Third World, LA

Member since Aug 2007

11884 posts

Posted on 4/19/20 at 5:08 am to sosaysmorvant

I nuked the F out of a portion of my yard. Granted, I half arse measured the ratios and it was right around our first hot spell in late February/early March.

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Posted by CrawDude

Baton Rouge

Member since Apr 2019

5820 posts

Posted on 4/19/20 at 9:01 am to sosaysmorvant

What type of lawn grass were you spraying, particularly in the area that turned “roundup” brown?

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Posted by sosaysmorvant

River Parishes, LA

Member since Feb 2008

1489 posts

Posted on 4/19/20 at 9:33 am to CrawDude

Centipede & St Aug

I know atrazine kills Bermuda.

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Posted by sosaysmorvant

River Parishes, LA

Member since Feb 2008

1489 posts

Posted on 4/19/20 at 9:35 am to sosaysmorvant

I did pour a good bit of non-ionic surfactant in the tank sprayer, but I wouldn't think that would affect anything.

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Posted by Duck Island

Member since Aug 2017

148 posts

Posted on 4/19/20 at 9:49 am to sosaysmorvant

My St Aug burned in the spots where my fan spray overlapped. It did get into the upper 80's after I sprayed so I figured that did it since my first application was fine.

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Posted by humblepie

Member since May 2008

536 posts

Posted on 4/19/20 at 10:11 am to sosaysmorvant

Yes too much surfactant can cause problems. Not saying for sure that is the issue here but you really should use only the recommended amount.

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