Jenna.....once the water hits 48-50 degrees FA is growing. We attack it with 10 lbs. of copper sulfate per surface acre. Add 4-6 grass carp per surface acre.

You might need to come back in 8 weeks and do another round of copper sulfate. After that just spot treat with a Cutrine Plus/Diquat combo for the rest of the year. 1 gallon of each mixed with 10 gallons of water in a tank sprayer will knock the hell out of it.....that quantity will take care of at least 1 acre of FA (and other things) if not more.

Of course, removing or eliminating the nutrient load is best but in farm country that can be pretty tough. Best of luck. We are in round 1 of this year's FA battle and have had great success so far. BM61.