The CASDAR LinicoLin research project (2022–2024), coordinated by Terres Inovia in collaboration with GEVES, seed companies, and Arvalis, has developed an initial protocol for assessing varietal resistance to Septoria linicola in both fibre and oilseed flax. This fungal pathogen can lead to significant yield losses and negatively impact both seed and fibre quality.
The protocol includes:
- A method for artificial field inoculation using inoculum produced by GEVES
- Harmonized visual rating scales across partners for symptom evaluation on leaves and stems
- A classification system to identify both susceptible varieties and those demonstrating partial resistance
While the preliminary results are promising, especially for oilseed flax, further research is needed — particularly for fibre flax — to strengthen the findings. If validated by the CTPS Section, the protocol will be supported by additional data to refine statistical methods for varietal classification, according to a press release.
Ultimately, this approach aims to support the development and use of septoria-tolerant flax varieties and contribute to reducing fungicide applications through improved genetic resistance.
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