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John

I am a commercial full service Certified Pesticide applicator in Fla. and Yes cat tail can be hard to control and will come back. I find it is better to use the Aquatic formulation of 53.4% Glyphosate instead of the non aquatic 41%. Application Equipment can make a big difference in response also.

My Rate for Cat tails is 4 oz of Aquatic 53.4% Glyphosate (Rodeo, Aqua star etc)and 2/3 oz of MSO (methylated Seed Oil) Per gallon. I use a 12V Fimco 2 GPM spray pump and a zero degree fan tip or a 15 degree fan tip. I soak the cat tails down making sure I get as close to 100% coverage as possible. Response is slow and I start to see a response in about 10 days. It might take an other 10 days to see a major brown out.

Next step is to mechanically remove as much of the Cat tails as possible. Of course regular monthly follow up treatment are advisable. Cat tail WILL come back a few times before they are totally controlled

PS Tractor Supply sells smaller 12V sprayers and tank set ups CHEAP. About $ 100 for a 15 gallon unit. These can be carried on ATV or lawn mowers etc and powered by their batteries. Be sure to add an extra 50 ft of hose or more to reach the treatment area. As a commercial applicator I have several 12V set ups on either ATV or boat. But I have one 15 gallon unit on wheels I pull around smaller ponds where I don't want to use a back pack or a ATV. I use a small $ 20.00 Sealed Gel Battery from TSC to power it. You might find these batteries in the electric fence section. They are small and easy to carry, but do the job for a short period of time. I charge it off my truck lighter socket.

For Terrestrial application I have a 65 gallon 12V Fimco 2 GPM pump and a 300 ft hose reel. My point being the power of these cheap throw away type Fimco Pumps to push 300 ft of hose and still do production type work. Let me also qualify my statement by saying I have Cab Over Trucks with PTO Warner Hydra cel 25 pumps. While the 12V pump don't put out like a PTO pump they still do a fine job. I also do many modication to my equipment. I like to use a Pressure washer Gun because of the nozzles.

Good Luck



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