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How to Manage Pests
UC Pest Management Guidelines
Pistachio
Powdery Mildew
Pathogens: Oidium sp.
(Reviewed 2/07,
updated 2/07)
In this Guideline:
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SYMPTOMS
Powdery mildew causes leaves to yellow, then brown and die. Infected
tissues may be distorted and misshapen. Similar symptoms can be found on
rachises, fruit stems, petioles, underside of leaf blades, and young shoots.
COMMENTS ON THE DISEASE
The disease commonly occurs on the Trabonella cultivar. Red Aleppo is
more susceptible than the Kerman cultivar.
MANAGEMENT
The occurrence of powdery mildew on pistachio trees is uncommon and sporadic.
No control measures are recommended.
UC IPM Pest Management Guidelines: Pistachio
UC ANR Publication 3461
Diseases
T. J. Michailides, Kearney Agricultural Center, Parlier
Acknowledgment for contributions to the diseases section:
B. L. Teviotdale, Kearney Agricultural Center, Parlier
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