Efficacy of Iranian diatomaceous earth deposits against Tribolium confusum Jacquelin du Val (Coleoptera: Tenebrionidae)

► Iranian DEs are promising with good insecticidal activity. ► SilicoSec® was the most effective DE followed by Mamaghan samples. ► Smaller particles were more effective than larger ones. ► Adherence of DEs to ventral side of head was more than ventral side of abdomen.