Diseases
Carthamus tinctorius L.
Tracheomycotic wilt of safflower caused by the specialized soil-borne fungus Fusarium oxysporum f. sp. carthami. The disease manifests as yellowing of leaves and browning of vascular bundles, leading to loss of turgor and plant death.
In the reference 3 varieties crop Safflower, where this is mentioned in the description.
The pathogen is a specialized form of the fungus Fusarium oxysporum Schlecht. f. sp. carthami, which affects exclusively safflower (Carthamus tinctorius). The fungus persists in the soil on plant debris and can also be transmitted via seeds and irrigation water, developing actively under warm and high-humidity conditions.
External symptoms include yellowing of the lower leaves, browning of the veins, and wilting, while internal stem tissues show pronounced browning of the vascular bundles. In severe cases, the plant completely loses turgor and collapses. Geographical isolates of the pathogen vary in virulence, although there is currently no generally accepted classification of races.
In breeding practice, efforts to combat safflower Fusarium wilt focus on screening genotypes under infectious backgrounds to identify resistant accessions. Specific host-plant resistance genes have not yet been mapped, so breeding relies on the selection of phenotypically resistant lines.
General information about the subject — on the page Fusarium wilt and blight.
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.