What are resistance profiles?
Resistance profiles are created by conducting analyses of a field population (or biotype) across a broad spectrum of herbicides. The reaction to products that are to be used in multi-annual crop rotation is detected in the greenhouse over several doses and a reaction profile is created. The aim is to find out which herbicides are still effective against the weed and which are not in the case of suspected resistance. If resistance is present, its mechanisms are analyzed in the laboratory.
First, however, a sufficient number of the weed seeds have to be harvested and prepared in the laboratory. The creation of resistance profiles is the most extensive and comprehensive testing system.
When should resistance profiles be created ?
If, for example, the leaf-test determines that there is no target-site resistance, a metabolic resistance (specifically NTSR, non-target site resistance) is suspected. This can be diagnosed by creating resistance profiles and excluding target-site resistance (TSR). Creating a resistance profile is worthwhile for long-term planning and for all farmers who have an interest in the sustainability of their production system.
Would you like an overview of the products that are still effective in your fields? Creating a resistance profile helps you to do so.
How long does it take to create resistance profiles?
Once the seeds have been received or collected by us (under Middle European conditions, usually at the beginning of July), they are dried. The seeds can be sown in September at the earliest. From cultivation to application to the taking of samples along with laboratory analysis and assessment, a test can take up to four months.
What information does the resistance profile provide and how does this benefit you?
You find out whether resistance to herbicides is present, and if so, what the underlying mechanisms are. Find out which products are still effective and can be used in your cultivation system. This gives you important information for making knowledge-based decisions when planning your cultivation System.
Please contact us in case of interest and further information.
You will find in the following video a general guidance for sampling and shipping:
