Triclosan Not a Threat to Food Chain

Jul 20, 2016

A recent study by the University of Guelph confirmed that the chemical Triclosan, one of the most commonly used antimicrobials in personal health care products, such as soaps, shampoos and other sanitation goods, does not pose a threat to the food chain or the environment. Triclosan is not water-soluble with 98% of the product removed along with biosolids at sewage treatment plants.

“Farmers apply the biosolids to their crop land as a soil amendment to capture organic matter and nutrients so we are pleased to hear that the most commonly used antimicrobial does not affect the food or feed we grow, nor does it impact the surrounding environment,” says Gord Green, President of the Ontario Soil and Crop Improvement Association. “Biosolids are highly regulated so the recent research provides confidence for both the urban population and the farm community that it is a valuable resource—a win-win for both parties.” The research was carried out under the supervision of Dr. Paul Sibley, at the School of Environmental Sciences, with graduate student René Sahba Shahmohamadloo conducting the research as part of his Master’s thesis.

“This research was unique compared to similar research across North America in that it included four formulations of biosolids across treatments of corn, soybean and spring wheat. Plant emergence and growth were studied at various stages to determine if there was any uptake of Triclosan. Arbuscular mycorrhizzal fungi was also evaluated as part of an environmental assessment,”

says Dr. Sibley.

The Half Life for Triclosan in soil is 80 days. In the scientific community when there is no known impact from a treatment they refer to it as “de minimis risk” to crops. Ontario’s strict regulations permit biosolids to be applied only once every five years on agricultural field crops. It is not permitted on land used for fruit or vegetable production.

The Ontario Soil and Crop Improvement (OSCIA) provided a graduate student scholarship to René Sahba Shahmohamadloo to assist in this research. OSCIA has set up a special Soil Health Graduate Scholarship Fund in cooperation with the University of Guelph. The Soil Health Graduate Scholarship will contribute to research for improving our valuable soil resources and contribute to sustainable crop production.

Source: OSCIA

Video: Dicamba Returns for Georgia Farmers: What the New EPA Ruling Means for Cotton Growers

After being unavailable in 2024 due to registration issues, dicamba products are returning for Georgia farmers this growing season — but under strict new conditions.

In this report from Tifton, Extension Weed Specialist Stanley Culpepper explains the updated EPA ruling, including new application limits, mandatory training requirements, and the need for a restricted use pesticide license. Among the key changes: a cap of two ½-pound applications per year and the required use of an approved volatility reduction agent with every application.

For Georgia cotton producers, the ruling is significant. According to Taylor Sills with the Georgia Cotton Commission, the vast majority of cotton planted in the state carries the dicamba-tolerant trait — meaning farmers had been paying for technology they couldn’t use.

While environmental groups have expressed concerns over spray drift, Georgia growers have reduced off-target pesticide movement by more than 91% over the past decade. Still, this two-year registration period will come with increased scrutiny, making stewardship and compliance more important than ever.