Study evaluates pink rib disorder tolerance in lettuce germplasm in humid subtropical environments
Subjective rating scale for pink rib severity of lettuce midribs. Scores range from 1 (no discoloration) to 5 (severe discoloration); 3 is the limit of acceptability/salability (adapted from Cantwell 2016). Credit: Journal of the American Society for Horticultural Science (2023). DOI: 10.21273/JASHS05295-23 Lettuce (Lactuca sativa) is primarily produced in the United States in California, Arizona