negative regulation of starch biosynthetic process
Any process that stops, prevents, or reduces the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of starch.
GO:0010558
negative regulation of macromolecule biosynthetic process
is_a
GO:0010581
regulation of starch biosynthetic process
is_a
GO:0045912
negative regulation of carbohydrate metabolic process
is_a
GO:0019252
starch biosynthetic process
negatively_regulates