Biorationals are low-impact substances or products that are typically biologically derived. If biorationals are synthetic, they are structurally similar and functionally identical to biologically occurring material (with minor differences between the respective stereochemical isomer ratios derived from biological or synthetic origins).Biorationals include biopesticides and non-pesticidal products that have multiple uses, including crop stress management, enhanced plant physiology benefits, root growth management, and postharvest treatments, or as an alternative control agent to conventional pesticides and antimicrobials.Source: ASTM, April 2013