This University of Missouri corn trial revealed that Vitazyme reduced the level of most free amino acids in leaf tissue when sampled at silking, but fairly large increases in isoleucine, ornithine, and arginine offset much of the reduction. Even so, the theory of tro- phobiosis -- where high levels of free amino acids in tissues encourage the growth of pathogenic fungi, bacteria, nematodes, and other pests -- is somewhat substantiated by these results. Vitazyme stimulates the metabolic activity of various cycles in leaves, so proteosynthesis is encouraged to reduce the free amino acid backlog in tissues, thus reducing pest feeding potential.