. "Any process that modulates the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of abscisic acid." . . . . . . "regulation of abscisic acid biosynthetic process" . "regulation of abscisic acid anabolism" . "regulation of abscisic acid biosynthesis" . "regulation of abscisic acid formation" . "regulation of abscisic acid synthesis" . . . . .