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Filtres

31 March 2026 . 1 month ago

This year, in many areas, we are seeing rapeseed crops that have stopped growing: delayed flowering, buds that have stopped developing or are even aborting, and plants that appear to have come to a complete standstill. Yet, in some cases, the fields are otherwise well-developed. The most likely explanation is physiological stress in the rapeseed, which began around the start of March. 

As part of FiLoLég, an initiative promoting grain legumes in the Hauts-de-France region, a webinar was held on March 24 to explore potential strategies for optimizing the use of legumes, creating new value chains, and strengthening protein self-sufficiency.
 

The webinar provided an overview of emerging protein crops, examples of existing value-added initiatives, and promising innovations, with a focus on the opportunities offered by pea starch and its industrial uses, as well as insights into potential ways to utilize fava bean hulls. 

To watch the webinar replay

30 March 2026 . 1 month ago

In Poitou-Charentes, Vendée, and Centre-Val de Loire, rapeseed crops were subjected to heavy pressure from pollen beetles in late February and early March during their early growth stages. Dropping nighttime temperatures and morning frosts locally exacerbated damage to floral parts, resulting in the loss of buds and even flowers. Other crop issues were often already present: widespread infestation of large flea beetle larvae, and locally, of terminal bud weevil larvae; poor root development and/or a taproot degraded by winter waterlogging. This is unprecedented: such an extremely early growing season with flowering beginning on March 5–10.  With much shorter daylight hours than in April, we can assume impacts on plant function, including reduced light energy capture and lower mobilization of assimilates. Added to this are the consequences of delayed fertilizer applications for a crop that is ahead in development (waiting for the soil to dry out), sometimes resulting in a significant delay between application and utilization (waiting for the return of rain). High temperatures have also accelerated the development of rapeseed, which has not always been able to feed itself properly and at the right time: climatic stress was exceptionally high in March. The explanation for plots in difficulty is often multifactorial. These abnormally stressed rapeseed plants could rebound once favorable conditions return.

Today, flowering is impaired in many situations, and the timing of fungicide application requires careful consideration. Forecasted weather conditions are dry and cold, which is generally unfavorable for the development of Mycosphaerella in affected fields. Additionally, wind will reduce application windows and limit the number of petals adhering to leaves (a route of Sclerotinia contamination).

In this context, determining stage G1 is complicated, and consequently, the decision to apply the key fungicide is as well. As a reminder, stage G1 is commonly referred to as “the first petals falling,” but petals fall from the very start of flowering! Another definition of this key stage is possible and easier to grasp: it is the formation of the first siliques on the main stem.

Stage G1 = the first 10 siliques on the main stem are present and measure less than 2 cm on 50% of the plants in the field. 

Stage G1 reached: Schedule
fungicide application
 

No siliques
Stage G1 NOT reached
Wait
 

March 26, 2026, Angliers (17)

25 March 2026

This partnership and sponsorship chair, of which Terres Inovia is a founding member, held its third annual conference on March 12 in Rouen at the UniLaSalle campus, bringing together 97 participants.

Researchers, industry professionals, partners, and stakeholders from the agricultural sector came together to address a central question: how can we effectively design tools, support their use, and measure their impact?

Within the H@rvest Alliance, the technical institute helps guide research questions, particularly by evaluating the relevance of digital agricultural tools (OADs), their effectiveness, and their conditions of use tested under agronomic conditions. It is particularly involved in work related to soybean irrigation management as well as numerical models linked to climate change.