AQUATIC HERBICIDES

When label recommendations are given in gallons or pounds of toxicant per surface acre, the only measure needed to calculate a correct dosage is the surface area of the pool.

GALLONS of concentrate needed for treatment of surface acre may be calculated as follows:

(A) = 10 lbs. of toxicant desired for each acre,
according to approved recommendations.
(B) = 8 lbs. of toxicant per gallon of concentrate in
the aquatic herbicide you are using
(C) = 10/8 = 1.25 gallons of concentrate needed for
each acre.

If a pool surface is 30 acres, 37.5 gallons of concentrate will be needed (1.25 x 30 = 37.5 gallons). Water may be added to the concentrate to facilitate adequate coverage during application.

POUNDS of granules to apply for each acre, when recommendations are expressed in pounds of toxicant per surface acre, are calculated as follows. The actual percent of toxicant in the granules is given, by weight, on the label.

If a pool surface is 10 acres, then 2000 lbs. of granules will be needed. 200 x 10 = 2000.

Granules are usually distributed by the broadcast method, but may be applied in a slurry of water.

DILUTION OF PESTICIDES
How to Make Desired Dilution
Approximate quantity of a liquid material to be added to various quantities of water to get certain dilutions:

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