The influence of feeding from Southern green stink bug male adults, female adults, and fourth-fifth instar nymphs on bolls of various ages and their effect on physical fiber quality was evaluated on field-grown plants in a no-choice experiment. Bolls of specific heat units were caged individually with male, female, or fourth-fifth instar nymphs or caged with no insects (control) for 72-h. All bolls were hand-picked at crop maturity and lint samples from each cohort of bolls classified in 50 heat unit age classes were analyzed for physical fiber quality traits. Southern green stink bug feeding on bolls significantly affected the physical fiber properties of micronaire, strength, uniformity, and fiber length. Discoloration of cotton lint in the infested bolls was more common than in non-infested bolls.