. "Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of ergosterol." . . . . "positive regulation of ergosterol biosynthetic process" . "activation of ergosterol biosynthetic process" . "positive regulation of ergosterol anabolism" . "positive regulation of ergosterol biosynthesis" . "positive regulation of ergosterol formation" . "positive regulation of ergosterol synthesis" . "stimulation of ergosterol biosynthetic process" . "up regulation of ergosterol biosynthetic process" . "up-regulation of ergosterol biosynthetic process" . "upregulation of ergosterol biosynthetic process" . . . .