The modeling framework used in this study estimates infection risk for the entire process from teliospore germination, through basidiospore production and germination, to penetration of barberry leaves by germ tubes grown from basidiospores as the infection by Pst or Pgt is strongly constrained by leaf wetness or high RH hours and temperatures [27,36,38,53]. This evidence concerns the gene SLCO2A1 and infection.