negatively regulates lamellocyte differentiation regulation of lamellocyte differentiation negative regulation of lamellocyte differentiation downregulation of lamellocyte differentiation down regulation of lamellocyte differentiation inhibition of lamellocyte differentiation biological_process Any process that stops, prevents, or reduces the frequency, rate or extent of lamellocyte differentiation. Lamellocytes differentiate massively in the lymph glands after parasitization and are large flat cells devoted to encapsulation of invaders too large to be phagocytosed by plasmatocytes. down-regulation of lamellocyte differentiation GO:0035204 negative regulation of hemocyte differentiation biological regulation