Propiconazole is absorbed by the assimilating parts of the plant, the majority within one hour. It is transported acropetally (upwards) in the xylem. This systemic translocation contributes to good distribution of the active ingredient within the plant tissue and prevents it from being washed off.

Propiconazole acts on the fungal pathogen inside the plant at the stage of first haustoria formation. It stops the development of fungi by interfering with the biosynthesis of sterols in cell membranes and more precisely belongs to the group of DMI - fungicides (demethylation inhibitors)

Tilt 250 EC has curative and eradicative activity gives the product high flexibility. The vapour phase contributes to optimum distribution of the active ingredient in the leaf mass. Although the biological mode of action of propiconazole premits protective, curative or eradicative use, best results are achieved if the product is applied when the disease is active but still in the early stage of development.

https://www.syngenta.ca/pdf/labels/TILT_250E_19346_en_pamphlet.pdf