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Georgia produces over 40% of the peanuts grown in the U.S. But many diseases attack Georgia peanuts due to favorable environmental factors. Fungal pathogens such as early (Cercospora arachidicola) and late (Cercosporidium personatum) leaf spot, soil-borne diseases such as white mold (Sclerotium rolfsii), and Tomato Spotted Wilt virus can cause dramatic yield losses. Much multi-state research is on-going to find solutions. Traditionally, peanut disease research involved manually sampling for disease and later hand weighing the crop yield from plots. Weighing plot yield is time consuming and laborious. This study was conducted to confirm that an accurate and reliable yield monitor could aid researchers in their on-farm investigations, eliminating the need for labor and equipment to make weight measurements after plots are harvested. On-farm plots (244 m by 3.6 m) were harvested with a peanut combine equipped with a yield monitor. Each plot.s yield was dumped and weighed using truck scales under wagons. Truck scale weights were compared to yield monitor weights. Yield monitor weights varied from truck scale readings by an average of only 1.7%. The yield monitor also provided data to create a yield map of the entire field, allowing researchers to gain more insight into how disease impacted yields over the field.