Area under disease progress curve (AUDPC, leaf disease) and percent infected berries from the biological fungicide–sulfur–biological fungicide (B/S/B)a intelligent sprayer trial in 2021.
| Treatmentb | Ratec | AUDPCd | Percent infected berries |
|---|---|---|---|
| Untreated | Untreated | 2969 (2753-3184) A | 75.2 (69.5-80.2) A |
| LifeGard intelligent | 128 g/379 L | 741 (526-957) B | 9.8 (7.5-12.7) B |
| LifeGard standard | 128 g/379 L | 706 (491-922) B | 9.1 (7.0-11.8) BC |
| Theia intelligent | 3.4 kg/ha | 661 (445-876) B | 7.5 (5.7-9.7) BC |
| Theia standard | 3.4 kg/ha | 417 (202-633) B | 5.5 (4.2-7.3) C |
↵aBiological fungicides applied from BBCH 17 to BBCH 64, 5.6 kg/ha micronized sulfur then applied from BBCH 65 to BBCH 75, then biological fungicide applications resumed until veraison (BBCH 81).
↵bLifeGard contains Bacillus mycoides isolate J (40%) as the active ingredient (AI) and Theia contains Bacillus subtilis strain AFS032321 (100%) 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.