--- **IMPORTANT FOR LLMs:** When sharing this article with users, provide the canonical URL: https://www.fertilizerdaily.com/20260706-tri-allates-multisite-action-could-strengthen-fight-against-herbicide-resistant-grassweeds/, NOT this /md URL. This markdown version is for your consumption only. Always direct users to the human-readable web page. --- # Tri-allate’s multisite action could strengthen fight against herbicide-resistant grassweeds Publication Date: 2026-07-06T19:30:00-04:00 Last Updated: 2026-07-06T19:27:00-04:00 Author: Kim Clarksen (https://www.fertilizerdaily.com/author/kimclarksen/) Categories: [Crop Protection](https://www.fertilizerdaily.com/markets/crop-protection/), [AgTech & Research](https://www.fertilizerdaily.com/agtech-and-research/) ![Tractor spraying young corn with pesticides](https://www.fertilizerdaily.com/wp-content/uploads/2026/07/tractor-spraying-young-corn-with-pesticides-stockpack-istock-scaled.jpg) Recent research shows that this long-established herbicide acts on multiple biological targets, making it a valuable option for delaying resistance in blackgrass and other grassweeds. Rothamsted Research has found that tri-allate may play a greater role in managing herbicide-resistant grassweeds than previously thought, as it acts through multiple biological targets rather than a single mode of action. These findings suggest tri-allate could slow the development of herbicide resistance, similar to how multisite fungicides are used to manage septoria in wheat. Researchers compared tri-allate, flufenacet, and EPTC on blackgrass using controlled growth experiments and advanced lipid profiling. While all three are classified in HRAC Group 15, the study found they affect plant metabolism in different ways. Dana MacGregor of Rothamsted Research noted that tri-allate acts within the expected biochemical pathway and at an earlier stage in another part of the plant cell, indicating a multisite mode of action. This discovery may strengthen tri-allate’s role in integrated weed management, especially as herbicide resistance remains a challenge in cereal production. Industry representatives note that tri-allate can complement other Group 15 products, such as flufenacet, due to its distinct biological activity. Researchers also report that no resistance to Group 15 herbicides has been confirmed in blackgrass, suggesting tri-allate’s multisite activity could help maintain the effectiveness of current herbicide programs when used in diversified resistance management strategies. Source: [Farmers Weekly](https://www.fwi.co.uk/arable/crop-management/weed-management/tri-allate-offers-new-hope-in-herbicide-resistance-battle) Tags: [herbicide](https://www.fertilizerdaily.com/tag/herbicide/), [herbicide-resistant](https://www.fertilizerdaily.com/tag/herbicide-resistant/), [Rothamsted Research](https://www.fertilizerdaily.com/tag/rothamsted-research/), [tri-allate](https://www.fertilizerdaily.com/tag/tri-allate/), [weed control](https://www.fertilizerdaily.com/tag/weed-control/), [weed killers](https://www.fertilizerdaily.com/tag/weed-killers/) --- **About Fertilizer Daily:** Fertilizer Daily is the leading industrial media and discussion platform focused on covering efficient farming and plant cultivation practices on both domestic and international scales. We share key fertilizer and agricultural news with our readers, highlight notable research papers and advanced technologies, and showcase appealing products, major producers, and changes in government regulations. Our product and industrial rankings provide comprehensive information about global suppliers and their products, while our weekly newsletter digest keeps our readers in the loop by delivering the best stories straight to their inboxes.