Pantoea agglomerans is a Gram-negative bacterium that belongs to the family Enterobacteriaceae. Formerly called Enterobacter agglomerans or Erwinia herbicola, it is an ubiquitous bacterium commonly isolated from plant surfaces, seeds, fruit (e.g., mandarin oranges), and animal or human feces. Pantoea agglomerans is found in the gut of locusts, which have adapted to use the guaiacol that Pantoea agglomerans produces to initiate swarming of locusts.