In a 2010 study, the effect of dry heat treatments of 60, 70 and 80 °C at two day intervals for 14 days on disinfesting seed infested with FOV race 4 was assessed ( Bennett and Colyer, 2010). Although none of the dry heat treatments eliminated FOV from seed, a significant decrease in infestation was obtained with treatment at 80 °C for 6 days, reducing the rate from approximately 30% to 3%. However, seed vigor and germination of cultivars Daytona and Cobalt were negatively affected after 2 and 4 days, respectively. Dry heat treatments of 60 °C and below were assessed on seed harvested from an FOV infested field in Louisiana. These temperature treatments decreased the rate of seed infection from above 60% to 20% during a 24 week experiment. Hot water treatments ranging from 45 s to 3 min successfully decreased the incidence of Fusarium-infected seeds with varying impact to germination and vigor. Of all experimental conditions, 105 s in water heated to 90 °C was the most successful treatment, reducing seed infestation from 50% to less than 10% ( Bennett and Colyer, 2010). Seed germination and vigor were not significantly compromised under these conditions. In a more recent study of thermotherapy on infested cotton seed, a hot water treatment at 60 °C for 20 min decreased seed infestation from 10.5% to 4.7% without decreasing seed vigor and germination (H. Doan, unpublished). Seed submerged in thiophanate (0.35 g a.i./L) at 75 and 80 °C for 20 min completely eliminated FOV race 4 from seed initially infested at a rate of 39.7%. However, seed vigor and germination were negatively affected (H. Doan, unpublished).