I have researched this most of the morning and here are a few links concerning the spray program. Seems it started in 2011, active complaints by 2013, the main concentration is right where I fish. Larger boats can safely fish the open Rez but smaller vessels can be caught by the speed the Rez blows up with a cloud. I found very few anglers happy with the spraying except Bass anglers who fished previous accessible premium flooded areas. Anglers who have fond memories of the good fishing in the areas many, many, years ago. I am not finding many who say the fishing has returned, only access to the areas.

Herbicide spraying at the reservoir

Why Ross Barnett Reservoir’s old bass-fishing holes are producing again

Ross Barnett Spraying Program