Change Site
Growers
Go Search
cancel
cancel
Thank you for signing up for eNews and/or creating an Almond Profile.
Your sign-up is complete.
Orchard Management 
top shadow
/Growers/PublishingImages/section%20headers/diseases.jpg 
  RELATED INFORMATION
Bacterial Diseases
Fungal Diseases
Soilborne Pests

Almond Diseases Rob Yields
and Tree Health

While there are numerous effective materials for controlling diseases in your almond orchard, disease resistance is a continuing threat to their efficacy. Resistance management is now a necessary component of all IPM programs in almonds.

The potential for resistance development is high with some of the newer classes of fungicides. For example, the pathogen that causes scab is becoming resistant to the strobilurin and benzimidazole fungicide classes, and pathogens that cause Alternaria leaf spot are losing their susceptibility to strobilurin fungicides. As a result, UC plant pathologists recommend making no more than four applications per season of strobilurins or carboxanilides to reduce the potential for increased resistance.

UC plant pathologists currently advise the following steps to maintain effective use of fungicides under high disease pressure that requires multiple fungicide applications:

    • Use fungicides effective for the target disease(s).
    • Time treatments for greatest efficacy at the appropriate stage of almond tree development.
    • Use full labeled rates.
    • Start with a fungicide that has a multiple site mode of action.
    • Rotate from one chemical class to another within the same season.
    • Use fungicides in combinations that provide multiple modes of action.
    • Do not apply fungicides within any given high-resistance potential class more than twice per season.
    • Discontinue use of alternate-row applications once flowers and leaves emerge.
    • Do not apply fungicides by air at full canopy.

External Links:

Guidelines for Almond Scab Management

In collaboration with Western Farm Press magazine, The Almond Board of California created an e-learning course on disease management in almonds 

UC IPM Almond Fungicide Resistance Management 

UC IPM Pest Management Guidelines 

Seasonal Guide to Environmentally Responsible Pest Management Practices in Almonds 

cancel
Thank you, your feedback has been sent to The Almond Board of California.
* Required fields
* First Name:
* Last Name:
* Email:
* Street Address:
Street Address 2:
* City:
* State:
* Zip:

Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01 Image 01
Warning: This link connects to a third party website not associated with the Almond Board of California. The link has been provided solely as a convenience to you and The Almond Board of California assumes no responsibility for the accuracy, quality, safety, or nature of the content on the linked site.
Click Agree to continue to the requested site, or click Decline to return to your most recently viewed Almond Board page.
agree decline