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Roundup Ingredient Lands On State’s Dangerous Chemical List

Containers of Roundup, left, a weed killer is seen on a shelf with other prod...

Credit: Associated Press

Above: Containers of Roundup, left, a weed killer is seen on a shelf with other products for sale at a hardware store in Los Angeles on Jan. 26, 2017.

Roundup Ingredient Lands On State's Dangerous Chemical List


Nan Sterman, host, "A Growing Passion"


California regulators on Friday will add the active ingredient in the weed-killer Roundup to a list of chemicals that may cause cancer, meaning Roundup and other herbicides with the chemical will have to display warning labels by next year.

Roundup maker Monsanto said the chemical, glyphosate, is not carcinogenic. The company is suing the state to remove the listing under Proposition 65. There are currently more than 900 substances on the state's potentially-dangerous chemicals list.

Since Roundup is the most widely-used weed-killer in California, the new warning may have lots of people searching for alternatives to keep their gardens weed-free. Garden expert and "A Growing Passion" host Nan Sterman said the simplest technique is often the most effective: just pull them out by hand or with a hoe.

"Personally, I find that really satisfying," Sterman said. "I use an asparagus knife and I just stick it in and pop the root out."

Sterman also recommended laying down at least three inches of mulch to help smother any burgeoning weeds. Another benefit is that if new weed seeds land on top of the mulch, it is a lot easier to pull weeds out of mulch than dense dirt.

Sterman joins KPBS Midday Edition on Thursday with more weeding tips, including organic sprays that could replace Roundup as a go-to tool.

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