Another question along the same line....
I treated a couple small areas of FA in my pond yesterday with Cutrine Plus liquid. Tonight I had a floater 8 inch YP and a 7 inch CC. I can't find anything on the Cutrine Plus liquid label that talks about spot treatment. What I need is a dosage for say a 1 gallon pump sprayer for 250 square feet. Anybody know what the correct dosage is for spot treating with Cutrine Plus liquid??????
I am not looking for a "how many PPM" answer. I want how many ounces per gallon. If you provide a PPM answer I will hunt you down and stab you with a dirty chopstick!
BUT, the answer is derived from the PPM dosage rate........
Just remember, I can lob a copper coated piece of lead further than chopsticks can reach.
The 250 sp. ft. measurement is meaningless unless you can attach a number of gallons of water to it. The dosage for 250 sq. ft. of water is different if the water is 6" deep than if the water is 24" deep.......
O.K. bear with me for a minute or 3. Lets look only at Filamentous algae according to the label.
It can be treated in low density at 0.2ppm, medium density at 0.6ppm and high density at 0.8ppm.
Gallons of product per acre foot of water at 0.2ppm is 0.6 gallons, 0.6ppm is 1.8 gallons and 0.8ppm is 2.4 gallons
An acre foot of water is 325,851 gallons. So to treat an acre foot of water at 0.2ppm you would need 76.8 fl. oz. of Cutrine Plus liquid. At 0.6ppm you would need 230.4 fl. oz. and at 0.8ppm you would need 307.2 fl. oz.
If the 250 sq. ft. area averaged 24" deep, that would be 500 cubic feet of water. 1 cubic foot of water = 7.48 gallons.
So the 250 sq. ft. area that is 24" deep on average will have 3,740 gallons of water. So to treat that volume of water you would need 0.881 fl. oz. of Cutrine Plus Liquid to achieve 0.2ppm application rate for low density FA, at 0.6ppm you would need 2.664 fl. oz. to achieve the application rate for medium density FA and at 0.8ppm you would need 3.526 fl. oz. to achieve the application rate for high density FA in that volume of water.
If the water depth averaged 12", cut that dosage rate in half.
So, will I still get stabbed with dirty chopsticks? Now do you see why knowing the volume of water is important (you can't go by just square feet of area)? That is why I wear sandals so frequently. I need all my fingers and toes to calculate application rates.
When applying any chemical, it usually doesn't matter how much water you mix with it, you have to calculate how much of the active ingredient or product you are applying.
If you think that was hard, you should try figuring out how fast the tractor should be going if you are applying 32 fl. oz. of product per acre and your spray boom covers a swath that is 30' wide and you have 5 spray nozzles and are spraying at 40 psi.
Maybe snrub can explain how to figure that out.