Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants How to use cutrine plus

I have had very good success eradicating duckweed and FA in my 4 acre pond in NC with the following mixed in a 15 gal sprayer: 20 oz 37% diquat, 60 oz Cutrine plus and 4 oz nonionic surfactant. After a lot of research I found a study on the efficacy of diquat plus copper. I will post a link to the study as soon as I can find it again. Basically, you add the diquat in the 15 gal of water, mix well, then add cutrine plus, mix well and lastly add the surfactant. Spray the surface at a rate of about 15 gallons per acre. Better results are obtained on sunny days when temps are in the 80's. You have to spray the mixture within an hour's time of mixing because the diquat and copper will chemically bind and become ineffective.