Several plant pathogenic fungi affect soybean plant health at different growth stages (Table 1). Although infection may occur early, many of these pathogens do not cause apparent symptoms until later growth stages. Frequently seedling health is ignored because plant populations are acceptable and stem and leaves do not express symptoms during early vegetative growth. Phytophthora sojae, Pythium spp. and Rhizoctonia solani are believed most important, but other plant pathogens are actively invading plants from growth stages VE to V4. Plant health assessment is important during this phase.