In non-sprayed tests with heavy leaf spot pressure, areas under the disease progress curve (AUDPC) for leaf spot severity ratings were lowest in DP-1, and were also suppressed in C-211-39, Georgia 01-R and Hull, as compared to Georgia Green and C-99R. AUDPC values were similar for C-99R and C34-24, and lower than those for Georgia Green. Spotted wilt and white mold were light in this trial.

In the second trial, with field tests conducted as Tifton, Ga. and Marianna, Fla., 13 cultivars were evaluated for resistance to Tomato Spotted Wilt Virus (TSWV). Wilson, ViruGard and Anorden had final TSWV ratings similar to Georgia Green in both locations, while Carver, Andru II, Georgia 01-R and C-99R had ratings significantly lower than Georgia Green. AP-3, DP-1 and Georgia-02C had the lowest-ranking final intensity ratings in this trial.

The third trial compared the differences in yield, percent of total sound mature kernels (TSMK) and spotted wilt severity when C-99R, DP-1, Georgia-01R and C34-24 were treated with four and eight-spray fungicide regimens.

The eight-spray regimen began with an application of Headline 31 days after planting (DAP), followed by a repeat of Headline at 45 DAP, four Folicur applications at 14-day intervals (59, 73, 87 and 101 DAP), and two applications of Bravo at 115 and 129 DAP. The four-spray regimen began with one application of Headline at 45 DAP, followed by two Folicur applications at 73 and 101 DAP, and one Bravo application at 129 DAP.

An analysis of the data showed no difference in yield or TSMK between the two fungicide regimens within cultivars. Averaged over cultivars, the TSMK percentage was also the same, with 75 for both the four and eight-spray regimens. There was, however, a marked difference in spotted wilt severity between the two regimens, with the eight-spray regimen showing significantly less spotted wilt than the four-spray regimen for all four cultivars.