In chopped sorghum, decreases in glucose were significant after 1 day of storage. Glucose decreased to near 0 mg mL−1 by 2 days after harvest, while the decrease in fructose was not as great. The Pearson correlation between total sugar and °Brix using day 0 means (non-deteriorated juice) was r=0.964 (n=32, ρ< 0.001). The correlation between total sugar and °Brix using the shredded sample means, which included deteriorated juice, was r=0.411 (n=24, ρ≤0.046). Juice °Brix should not be used to evaluate juice for deteriora- tion. We conclude that whole stalk and billet harvesting are superior to harvesting by forage harvester since forage-harvested sorghum would have to be processed within hours to maintain the sugars.