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Chilling Hours Update 2021-Yuba City

Because there is not a CIMIS station close to Yuba City, Janine Hasey calculates chilling based on a temperature recorder at the UCCE office in Yuba City. Chill data will be updated weekly.

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Emergency Use (Section 18) Approved for Almond Bacterial Blast Material

Bacterial blast (Pseudomonas syringe), although thankfully not a problem every year (hopefully including 2021), can be tremendously damaging to almond yields. For example, significant crop damage was reported in the Sacramento Valley in 2017 and 2018, and in the San Joaquin Valley in 2017 and 2019. These grower reports of past crop loss supported a Section 18 emergency request for the use of kasugamycin on almonds during bloom.

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Hive Strength and Bee Health/Safety

A large almond crop at harvest requires good bee activity at bloom in the orchard. Read to learn more about best practices for keeping bee hives in your orchard strong and healthy at bloom.

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Krymsk 86 rootstock: Superb anchorage in gale-force winds

The aftermath of gale-force winds in the southern Sacramento Valley last week has further highlighted the importance of selecting prune rootstocks with good anchorage. In commercial orchards and trials alike, Krymsk 86 rooted prune trees consistently withstand applied force better than most other rootstocks.

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Photos 2 & 3. Second leaf prune trees on Myro 29C rootstocks after strong wind storms in Sutter County in 2010. Photo Credit: F. Niederholzer

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Early Season Irrigation: Do We Know When to Start?

One of the motivations for making good water management decisions early in the growing season is to reduce risk of root and crown diseases that can eventually kill almond, walnut, prune, and other tree species. Early season water management influences the environment where roots grow by affecting soil temperature and aeration and can be pivotal in how much tree decline actually occurs.

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  • Upcoming Events

    1. Mar
      30

      Field Rodents- Vertebrate Pest Council Virtual Workshop

      March 30, 2021
    2. Apr
      19

      2021 Principles of Fruit and Nut Tree Growth, Cropping and Management

      April 19-23, 2021

    View Full Events List

Almonds

Cultivars & Rootstocks, Diseases - Foliar, Diseases - Trunk & Soil Borne, Horticulture, Insects & Mites, Irrigation, Pollination, Vertebrates, Weed Control, Year-Round Management

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Prunes

Bloom Management, Diseases, Horticulture, Insects & Mites, Irrigation, Weed Control, Year-Round Management

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Walnuts

Cost and Expense Considerations in a Lean Price Year, Diseases, Flood Damage, Horticulture, Insects & Mites, Irrigation, Walnut Orchard Development, Weed Control, Year-Round Management

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Photos from the Field

Photos and field diagnoses from farm calls and other trips into local orchards.

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Manuals

Lengthier but in-depth resources for management and troubleshooting.

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