Damage to corn from artifical infestations was not as severe with eggs from a non-diapause strain ofDiabrotica virgiferaLeConte as from infestations with eggs from field-collected beetles in an adjacent study. Damage was probably reduced because (1) the non-diapause eggs lost viability after infestation in the field, whereas eggs from field-collected beetles did not, and (2) the non-diapause eggs hatched 6 days earlier than those from field-collected beetles. Hatch occurred when the corn plants were still quite small; perhaps this kept many of the larvae from becoming established on the plants. Non-diapause eggs would probably not be useful for field infestations at planting time but might be useful in determining pest/host plant relationships with post-planting infestations.