bwhite82

May 10th, 2010, 02:38 AM

This should be simple, but it is frustrating me. First a little background info, I am studying for a Private Applicator License to be able to use restricted-use pesticides on ornamental turf grass. The exam is heavy on pesticide labeling. Here is my dilemma and the math issue:

I am working with two 1-gallon containers of a certain pesticide, both contain the SAME active ingredients, but one merely has higher percentages of active ingredients than the other (one is marketed toward joe homeowner, the other to a lawn care company). The actual labels are below for your reference:

Trimec Classic (http://www.pbigordon.com/pdfs/TrimecClassic-SL.pdf)

Trimec "Lawn Weed Killer" (http://www.pbigordon.com/pdfs/TrimecLawnWeedKiller-SL.pdf)

Trimec Classic contains 1.98 lbs (21.54%) of 2-4-d per gallon

Trimec "Lawn Weed Killer" contains .54 lbs (6.30%) of 2-4-d per gallon

Trimec Classic says to mix 1.2 to 1.5 fl oz of product into .5 to 6 gal of water (depending upon spray volume) per 1000 sq ft of lawn

Trimec "Lawn Weed Killer" says to mix 2 fl into 2 gallons of water per 500 sq ft of lawn

My question is, will both have the same "weed killing power"? ie do they both contain the same amount of active ingredient (2-4-d) after mixed into their respective 2-gallon spraying containers?

Pulling my hair out here! Should be simple, I mean I'm not dealing with calculus here, just basic mathematics.

I am working with two 1-gallon containers of a certain pesticide, both contain the SAME active ingredients, but one merely has higher percentages of active ingredients than the other (one is marketed toward joe homeowner, the other to a lawn care company). The actual labels are below for your reference:

Trimec Classic (http://www.pbigordon.com/pdfs/TrimecClassic-SL.pdf)

Trimec "Lawn Weed Killer" (http://www.pbigordon.com/pdfs/TrimecLawnWeedKiller-SL.pdf)

Trimec Classic contains 1.98 lbs (21.54%) of 2-4-d per gallon

Trimec "Lawn Weed Killer" contains .54 lbs (6.30%) of 2-4-d per gallon

Trimec Classic says to mix 1.2 to 1.5 fl oz of product into .5 to 6 gal of water (depending upon spray volume) per 1000 sq ft of lawn

Trimec "Lawn Weed Killer" says to mix 2 fl into 2 gallons of water per 500 sq ft of lawn

My question is, will both have the same "weed killing power"? ie do they both contain the same amount of active ingredient (2-4-d) after mixed into their respective 2-gallon spraying containers?

Pulling my hair out here! Should be simple, I mean I'm not dealing with calculus here, just basic mathematics.