Agriculture: Strawberry Pest Management Guidelines

Most Effective Treatment Timings for Key Diseases

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 rot3 0 0 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., 2022. Fungicides, Bactericides, Biocolntrols, and Natural Products for Deciduous Tree Fruit and Nut, Citrus, Strawberry, and Vine Crops in California. (PDF)

Text Updated: 03/22
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