New weed control for Ontario, Fiesta by Neudorff has been posted on the Environmental Registry as of April 22, 2010.
According to the Registry:
"FeHEDTA meets the criteria for Class 11 pesticides which are allowed for controlling pests in lawns and gardens. Class 11 pesticides include biopesticides and certain lower risk pesticides. The biopesticides are those designated by Health Canada's Pest Management Regulatory Agency (PMRA). Lower risk pesticides have characteristics such as low toxicity to humans, minimal impact to the environment and act in a non-toxic way in controlling intended pests."
http://bit.ly/b1MVAW
Comment from someone who tried a similar product in Northern Illinois
Jon W. Says:
Five days ago, I applied ferric HEDTA (aka Iron-X when bought from Gardens Alive) to a small area of my lawn. I bought one 16oz bottle of the concentrate and used 2/3 of it to make 2 gallons of solution per the product instructions. I applied this to about 300 square feet (28 square meters) of a northern Illinois lawn which hasn’t has a bit of fertilizer or herbicide applied to it in 27 years. Very few parts of the lawn are >50% grass and a few are almost 100% broadleaf weeds and clover. (I don’t consider clover a weed.) I intentionally applied the product at varying rates from about 0.5 to 1.5 gal/100 sq ft to judge its effectiveness. It was applied immediately after mowing and three days before a 1.4 inch (36mm) rain.
Even at lower application rates, it did a good job of knocking down dandelions, which seems to be the species most affected by this product. It only killed plantain at the higher end of its application rate. Ground ivy (creeping charlie), thistle, violets, catnip and garlic mustard seemed to be moderately affected by it. It killed the few garlic mustard plants I sprayed, but those were along a fence and may have received a higher dose. White clover seemed to be least affected by it. I couldn’t discern any damage to grass. Flowering and seed release in surviving dandelions was noticeably lower than in the rest of the lawn.
Even though the product didn’t completely eliminate weeds, it reduced them enough to make me decide to treat the entire lawn with it.
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