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Name: Cindi W.
Status: other
Age: 30s
Location: N/A
Country: N/A
Date: Thursday, September 12, 2002


Question:
We have sumac growing all over our lawn and we're having trouble eliminating it. What will kill this plant and help keep it from coming back? My husband has already had a reaction to it that didn't go away for months.


Replies:
There are several over-the-counter herbicides that will work on sumac and other broad leaf plants. Glyphosate is a popular choice. This is from

http://www.audubon.org/bird/pesticides/#Herbicides

GLYPHOSATE (An alphatic herbicide used in Roundup and other products.)

Uses: Glyphosate may be America's favorite all-purpose weed killer. It's a nonselective herbicide, which means it kills virtually anything that is green, including annuals, perennials, grasses, sedges, broadleaf weeds, and woody plants.

How it works: When sprayed on foliage, glyphosate is readily absorbed and quickly moves throughout the plant. It disrupts amino-acid synthesis, causing white spots or streaks on leaves and eventual cell and plant death.

Toxicity to Humans and Wildlife: Some formulations of glyphosate are nearly nontoxic to humans, while others (particularly the trimethylsulfonium salt) are more dangerous if ingested. It is usually nontoxic through skin exposure, but some versions can be extremely irritating to the skin or eyes and acutely toxic through inhalation, so make sure you read the label carefully. It binds tightly to soil particles, so its leaching potential is low. Some formulations are more toxic to aquatic species than others, but in general, risk to fish is low. It's also nontoxic to honeybees and virtually nontoxic to earthworms.

EPA Rating:

Alternatives: Try better mowing techniques, mulching and weeding your garden, or spot treatment of plants with soap-based sprays.

J. Elliott



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