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