Find all essential information about the webinar below.
Dec 4, 2025 · 10:00 CET
Join our free Webinar:
Cleaner fields, higher yields - Insights into effective grass weed control
For agricultural advisors and farmers across Europe – presented by the Agris42 resistance experts.
Agris42 enables farmers across Europe to better understand resistance situations in their fields and to choose the right herbicides. Learn how you can benefit from our practical experience and proven methods.
About the Webinar
This webinar will focus on the following topics:
- How to protect your yields and reduce unnecessary costs
- How to design weed control strategies that actually work
- How to reduce weed pressure sustainably
- How to test your fields for herbicide resistance
Meet the Speaker
- CEO of Agris42 - Europe’s leading provider of herbicide resistance testing
- Researching herbicide resistance since 2013
At a glance
- December 4, 2025
- 10:00 AM (CET / UTC +1)
- 45-60 minutes + Q&A session
- English
Customer feedback
We recently took over a leased field with a severe blackgrass infestation. The results of the resistance analysis now give us a clear picture of how strong the resistances are to different herbicides. This helps me make better decisions and avoid expensive trial-and-error in the field.
Farmer from Northern Germany
The fields on our farm are located in different districts and we work on very different soils – from sand to alluvial sites to clay. We have to deal with the control of windthale, foxtail and ryegrass, sometimes with several species in one field. As we swap many areas with colleagues and don’t always know the previous measures, the resistance tests help us to select the spring herbicides. This enables high efficiencies and improved profitability.
Farmer from Central Germany
Why you should join
Weed resistance is one of the most pressing challenges in modern crop production.
This webinar brings together scientific insights and practical experience to help you understand how grass weeds affect yields — and what you can do to manage them more effectively.
In this webinar, you will:
- Get exclusive insights from Europe’s resistance testing experts
- Discover practical examples from real field situations
- Ask your questions live during the Q&A session
About the Company
Agris42 is an independent agricultural technology company based in Germany, specializing in herbicide resistance testing. We work with farmers, advisors, and research institutions across Europe to make crop management more efficient and sustainable.
Our mission is to turn complex agronomic data into clear, actionable insights that support better decisions in the field.
FAQ
Weed resistance basics
What exactly is herbicide resistance?
Herbicide resistance is a naturally acquired trait that enables a plant to survive a herbicide dose that would normally be lethal.
In practical terms, this means that standard application rates may no longer be effective.
How widespread is resistance in Europe?
Herbicide resistance has been the subject of scientific research since the 1960s. Nevertheless, until recently there was no inexpensive, preventative testing option, so that resistance to 22 of 28 mechanisms of action is currently occurring in 82 crop species in Europe. Of these, however, only a few weeds and grasses are of agronomic importance. However, only a few of these species are of major agronomic concern—most notably blackgrass (Alopecurus myosuroides) and silky bent (Apera spica-venti), but increasingly also ryegrass (Lolium spp.) and bromes (Bromus spp.).
How does herbicide resistance develop?
Herbicide resistance is a naturally occurring characteristic—not caused by herbicide use itself. However, frequent application of the same herbicides selects for plants carrying this trait over time.
It’s estimated that 1 in 100,000 to 1 in 10 million plants may carry resistance—even without previous herbicide exposure.
With weed populations of 1,000 plants per square meter, this means that 1 to 100 resistant plants per hectare may already be present before the first application.
Without integrating agronomic practices and with repeated herbicide use, resistant plants will become increasingly dominant.
What can be done to combat resistance?
The first step is resistance testing to determine which herbicides are still effective—because there is no such thing as “the” resistance.
Our test gives you a clear overview of which herbicides (and in which crops) you can still use, allowing you to adapt your crop rotation and agronomic strategies accordingly.
How long does it take until the current resistances disappear again?
There’s no definitive timeframe. However, a return to full herbicide efficacy is unlikely within 10 to 20 years.
Research suggests it may take over 50 to even 100 years. This highlights the importance of early detection and proactive resistance management.
Where can I learn more about how resistance testing works?
You can watch our short explainer video. It shows how resistance develops, how testing works, and how the results can support better decisions in the field.
Webinar details
Who is Agris42?
Agris42 is a small team of agricultural scientists and one IT specialist based in Germany. We combine practical farming experience with many years of expertise in the agrochemical industry. Our work focuses on helping farmers and advisors better understand weed resistance and make informed decisions.
Is the webinar free to attend?
Yes, participation is completely free of charge.
Will the webinar be recorded?
No. The session will not be recorded, so we encourage you to join live.
Do I need special software to join?
No. You can join via your browser or through the Zoom application if installed.
How long does the webinar last?
The presentation lasts around 45–60 minutes, followed by a live discussion and Q&A session.
Will I receive the slides afterwards?
No. The slides will not be shared, but the key points will be discussed during the session.
Who is the webinar for?
The webinar is designed for agricultural advisors, farmers, and anyone who wants to better understand weed resistance and improve grass-weed control strategies.
Do I need any prior knowledge to follow the webinar?
No. The session is suitable for both experienced advisors and farmers who want a compact overview of resistance challenges.
Can I forward the webinar link to colleagues?
Yes, but please encourage them to register as well.
