2023/12/12 by Meynard, Jean-Marc, Rolland, Bernard, Loyce, Chantal +2
#0 #BLE TENDRE D'HIVER #ENVIRONNEMENT #INTERACTION GENOTYPE-ENVIRONNEMENT #MALADIE FONGIQUE #MARGE #PROTECTION INTEGREE DES CULTURES #RESISTANCE VARIETALE #VERSE
paper · doi:10.17180/bwb6-xd48
Since the 80’s, winter wheat management in France has focused on cropping high-yielding cultivars with an intensive use of external inputs. However, the breeding of effective resistances to fungal diseases has received higher priority for the past ten years. Meanwhile, low-input strategies have been developed to save on costs and to meet environmental targets. They could be used to extend cultivar evaluation to a broader range of crop management systems. The paper aims to evaluate cultivars resistant/sensitive to diseases under low-input/high-input crop management systems in order to assess their economical, energetic and environmental performances. Two multi-environment networks were carried out to test the combinations of cultivar and crop management system over a wide range of growing conditions. We allowed variations of several factors to assess the vulnerability of these combinations to changes in the economical context and to integrate recent increases in grain and oil prices. Results showed that it is environmentally and energetically sound to grow resistant cultivars under low-input crop management systems. Such combinations also lowered the profitability sensitivity to grain price. Lastly, they were the more often profitable when grain prices were low, and in a context of average grain prices combined with high oil prices.