Note: Not all indicated timings may be necessary for disease control.
| At Planting | Preharvest1 | |||||
|---|---|---|---|---|---|---|
| Disease | Preplant fumigation2 | Clean nursery stock | dips or water washing | before overhead irrigations | foliar | fruit |
| Angular leaf spot | 1 | 3 | 1 | 3 | 1 | 0 |
| Anthracnose3 | 3 | 3 | 3 | 1 | 1 | 3 |
| Botrytis fruit rot/gray mold3 | 0 | 3 | 0 | 1 | 2 | 3 |
| Common leaf spot3 | 1 | 3 | 3 | 3 | 3 | 1 |
| Fusarium wilt | 3 | 2 | 0 | 0 | 0 | 0 |
| Leather rot4 | 3 | 0 | 0 | 2 | 0 | 2 |
| Macrophomina crown rot | 3 | 2 | 0 | 0 | 0 | 0 |
| Mucor fruit rot | 0 | 0 | 0 | 1 | 1 | 3 |
| Phytophthora crown rot4 | 3 | 1 | 0 | 2 | 1 | 0 |
| Powdery mildew3 | 0 | 3 | 0 | 0 | 3 | 1 |
| Red steele | 2 | 2 | 0 | 1 | 2 | 0 |
| Rhizopus rot (Leak) | 0 | 0 | 0 | 0 | 0 | 3 |
| Verticillium wilt | 3 | 2 | 0 | 0 | 0 | 0 |
Rating: 3 = most effective, 2 = moderately effective, 1 = least effective, and 0 = ineffective
| 1 | Preharvest treatments include applications of fungicides before heavy fog, dews, or rain. |
| 2 | Preplant fumigation includes chloropicrin, 1,3-dichloropropene/chloropicrin or chloropicrin followed by metam sodium or metam potassium. Alternatively, make solitary applications of 1,3-dichloropropene/chloropicrin or chloropicrin. |
| 3 | To reduce risk of fungicide resistance development, use an integrated program that includes a rotation of fungicides with different modes of action. |
Acknowledgment: Adaskaveg et al., 2025. Fungicides, Bactericides, Biocolntrols, and Natural Products for Deciduous Tree Fruit and Nut, Citrus, Strawberry, and Vine Crops in California.
Text Updated: 07/24