Corn seeds of two hybrids (Pioneer 33R78 and DKC60-16) treated with two rates of Poncho^® (250 and 1250 mg/seed) and Cruiser^® (125 and 250 mg/seed) were planted in large pots in the greenhouse (1 seed/pot). There were four pots or replications of each treatment. Plants were destructively sampled at one, two and five leaf stages. Leaf area and root fresh weight were measured at the one and two leaf stages and plant fresh and dry weight were measured at the one, two and five leaf stages. Since there was no interaction between hybrids and treatments, treatments were combined for statistical analysis. There were no significant differences between the untreated plants and those treated with Poncho^® or Cruiser^® in any of the parameters tested (Tables 1-4). These results suggest that the seed treatments do not stimulate plant growth (root and shoot development) and that difference in plant growth noted in the field likely result from some other cause such as protection from insect feeding.