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05 Jan 2024 < Back

Research into herbicide induced dormancy

During the 2023 International Invasive Weeds Conference, the panel debate delved into the intriguing subject of Glyphosate-induced dormancy. This marked the initiation of an ongoing exploration that the PCA is undertaking to comprehend this phenomenon better.

In the upcoming weeks, we will launch a digital survey seeking valuable data from our members. This anonymised data will be a crucial component of our research study. When it is released, we urge all PCA invasive weed members to take the time to complete the survey accurately, ensuring that the data collected is truthful and precise.

The purpose of the research

As many of our invasive weed members will be aware, dormancy plays a vital role in plant life cycles influencing everything from winter survival to adaptations during mass extinctions. Even the arrangement and spacing of stems and leaves are influenced by bud dormancy.

The molecular pathways governing dormancy are intricate, involving various stimuli, plant growth regulators, and sugar concentrations. While Japanese knotweed's winter dormancy is well-known, herbicide-induced dormancy has limited literature and data. Based on collective experiences, Japanese knotweed can enter dormancy for several years after herbicide treatment only to resume active growth later.

However, exceptions do exist and are evident in excavations revealing decomposed rhizome remains or root holes in treated areas. Successful herbicide treatment programmes undertaken by PCA members underscore the complexity of this phenomenon, raising questions about its prevalence, duration, and the influence of factors such as maturity, rhizome establishment, and treatment methods.

The critical questions...

The critical questions concentrate on how common this phenomenon is, how long it persists, the impact of factors such as maturity and treatment methods, and crucially...whether herbicides directly induce dormancy (considering other possibilities). A more profound understanding of this topic has the capability to unveil enhanced herbicide-supported management options, guiding clients toward informed decisions regarding the potential dormancy induced by glyphosate.

In conclusion...

The exploration of Glyphosate-induced dormancy in Japanese knotweed is an ongoing journey that requires collective insights and contributions. The PCA remains dedicated to advancing research and knowledge in invasive weed control, and your valuable input will play a pivotal role.

As we navigate the intricate world of plant dormancy, we look forward to collaborating with our members to uncover new insights, refine existing practices, and ultimately provide enhanced guidance. Together, we can contribute to a more nuanced understanding of herbicide-induced dormancy, fostering innovation and progress in our shared mission to manage invasive non-native species effectively.

Comments

Andy Kay

Its good to see that this issue is, at long last, being taken seriously. We look forward to contributing to the research.

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