Syngenta, a global player in agricultural innovation, announced a major breakthrough in weed control with the launch of its latest herbicide molecule—metproxybicyclone. The novel solution has been officially recognized by the Herbicide Resistance Action Committee (HRAC) and the Weed Science Sciety of America (WSSA) as part of a new chemical subclass within the ACCase-inhibitor family.
Metproxybicyclone represents the fourth generation of ACCase-inhibitors—a significant leap since the last major innovation in this class nearly two decades ago, when Syngenta introduced pinoxaden in 2006. The long gap between generations underscores the scientific and regulatory challenges of developing safe and effective weed control tools.
Targeting a Worsening Global Crisis
Weed resistance poses a growing global threat. “Experts have officially reported herbicide resistance in 75 countries, impacting farmers across more than 100 crops,” said Camilla Corsi, Syngenta’s Global Head of Research and Development. “Of the 273 weed species affected, 40% are grass weeds—creating a critical challenge to food production,” Corsi added.
In response, the company accelerated research to develop a next-generation herbicide capable of overcoming resistance to common chemistries like glyphosate and clethodim. Pending regulatory approvals, Syngenta plans to launch metproxybicyclone in Argentina by 2026, offering much-needed relief to soybean and cotton growers.
Engineered with Precision and Sustainability in Mind
Scientists at Syngenta’s International Research Centre in Jealott’s Hill, UK, invented the herbicide by drawing on deep expertise in ACCase-inhibitors. They combined this knowledge with advanced computer modelling to design a highly selective and potent molecule. This innovation embodies Syngenta’s “Safer by Design” philosophy—developing crop protection solutions that balance performance with environmental stewardship.
Metproxybicyclone addresses resistant grass weeds. It also aims to minimize environmental impact by optimizing its sustainability profile—an increasingly critical factor in global regulatory landscapes.
Strengthening a World-Leading Innovation Pipeline
The latest development reinforces Syngenta’s position as a global powerhouse in agricultural R&D. The company’s robust portfolio includes cutting-edge technologies like ADEPIDYN™, PLINAZOLIN™, and TYMIRIUM™. It also features a fast-growing suite of biological and digital solutions.
As reported by agribusinessglobal.com, growers worldwide are grappling with evolving resistance and rising productivity demands. In response, Syngenta continues to push the frontiers of science—delivering sustainable, science-driven solutions to secure the future of farming.



