Products are provided that improve overall plant vigor and yield by combining agriculturally effective amounts of at least one spore-forming bacterium and at least one optional insect control agent to a genetically modified plant, plant part, or seed. This product is particularly effective in the presence of plant parasitic nematode and fungal species. Use of the product leads to an overall reduction in crop losses caused by either plant parasitic nematodes or fungi and this reduction is much greater than using genetically modified seed with just an insect control agent. According to some embodiments, the use of the product results in about a 2%-10% increase in soybean bushel yield, 3%-6.5% increase in cotton yield, and 3%-8% in corn bushel yield. Methods for utilizing and manufacturing the combination are also provided.
