Area under disease progress curve (AUDPC, leaf disease) and percent infected berries from the sulfur–biological fungicide–sulfur (S/B/S)a intelligent sprayer trial in 2021.
| Treatmentb | Ratec | AUDPCd | Percent infected berries |
|---|---|---|---|
| Untreated | Untreated | 2964 (2916-3012) A | 74.0 (68.0-79.2) A |
| Aviv intelligent | 887 mL/379 L | 2266 (2081-2451) B | 13.8 (10.7-17.7) B |
| Aviv standard | 887 mL/379 L | 2231 (1982-2480) B | 16.1 (12.5-20.4) B |
| Serenade ASO intelligent | 9.3 L/ha | 1974 (1552-2396) B | 14.6 (11.3-18.7) B |
| Serenade ASO standard | 9.3 L/ha | 2236 (2004-2467) B | 18.2 (14.2-23.0) B |
↵a5.6 kg/ha micronized sulfur applied from BBCH 17 to BBCH 64, biological fungicides then applied from BBCH 65 to BBCH 75, then 5.6 kg/ha micronized sulfur applications resumed until veraison (BBCH 81).
↵bAviv contains Bacillus subtilis strain IAB/BS03 (0.08%) as the active ingredient (AI) and Serenade ASO contains B. subtilis strain QST 713 (1.34%) as the AI.
↵cAll treatments applied at 552 kPa; intelligent sprayer treatments applied at 125 mL/m3 of grape canopy.
↵dEstimates are followed by asymptotic 95% confidence intervals in parentheses. Treatments followed by different letters are statistically different from each other, marginal means contrast (p ≤ 0.05) with p values adjusted using Tukey’s method.