The ability of sunflower hybrids to maintain stable yield and oil content levels when affected by pathogens or environmental stress factors.
In the reference
633
varieties
crop Sunflower,
where this is mentioned in the description.
Tolerance in sunflowers is characterized by the interaction within the plant-pathogen system, where a hybrid maintains productivity even in the presence of a disease, such as Phomopsis, Fusarium wilt, or charcoal rot. Unlike immunity, this trait does not imply complete resistance but reflects the plant's ability to withstand infectious pressure without a critical reduction in seed weight.
Tolerance assessment is conducted through comparative field trials by analyzing productivity indices and regression coefficients under epiphytotic or stress conditions. Hybrids with high tolerance demonstrate stable yield performance, which helps reduce dependence on fungicide treatments and enhances the crop's ecological plasticity across various soil and climatic zones.
General information about the subject — on the page
Tolerance.
Varieties of Sunflower mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.