Several insecticides were tested for ovicidal activity on spotted tentiform leafminer (STLM), Phyllonorycter blancardella (F.). In one laboratory experiment, fenvalerate and methomyl caused 88 and 72% egg mortality, respectively, whereas endosulfan was less effective (29.6% egg mortality). The control (water) had the lowest egg mortality (8%). In a second laboratory experiment, fenvalerate, permethrin, and methomyl caused 92, 92, and 77% egg mortality, respectively, whereas the control showed low egg mortality (13%). In field applications, fenvalerate and diflubenzuron were effective ovicides (100 and 70.7% egg mortality, respectively). Single-tree applications of fenvalerate and diflubenzuron showed both treatments to be ovicidal at low rates. Insecticides targeted at the egg stage and applied before hatch add a new dimension to STLM management.