Agriculture: Nectarine Pest Management Guidelines

Treatment Timing for Key Diseases

Not all indicated timings may be necessary for disease control.

Bloom 3 to 6 weeks Preharvest1
Disease Dormant 20 to 40% 80 to 100% postbloom 3 weeks 1 week
Brown rot 0 2 3 1 2 3
Leaf curl3 3 1 0 0 0 0
Powdery mildew 0/ND 2 3 32 0 0
Rust 14 0 0 3 2 0
Scab 0 1 2 3 0 0
Shot hole5 3 1 1 2 0 0
Rating: 3 = most effective, 2 = moderately effective, 1 = least effective, and 0 = ineffective (ND=No data).
1Timing not exact; weather conditions determine need for treatment.
2Apply until pit hardening.
3Treatment should be made before bud break and preferably before bud swell.
4Dormant treatment with liquid lime sulfur.
5Fall application before winter rains begin is the most important; additional spring sprays are seldom required but may be needed to protect the fruit if heavy persistent spring rains occur.

Acknowledgment: Adaskaveg et al., 2022. Fungicides, Bactericides, Biocontrols, and Natural Products for Deciduous Tree Fruit and Nut, Citrus, Strawberry, and Vine Crops in California. (PDF)

Text Updated: 03/22