About Weather-Related Models

Weather-Related Models (Pomology Weather Services) was created to provide a simple and efficient way to disseminate timely weather-related tree crop information to California fruit and nut growers, researchers, and industry professionals. The service was made possible through the financial support of several commodity groups, collaboration with the UC Statewide Integrated Pest Management Project, the California Department of Water Resources, and the commitment and expertise of UC scientists and staff.

The Fruit & Nut Research and Information Center is grateful for this collaboration and supports and invites their continued involvement to develop and update weather-related models as useful tools in the management of California tree crops.

Acknowledgements

Chilling Unit Accumulations

Support: Almond Board of California (1998, 1999), California Pistachio Commission (1998, 1999), California Prune Board (1998, 1999), California Fruit Tree Agreement (1998), Cling Peach Growers Advisory Board (1998), Dormex Company USA LLC (2006)
In Cooperation with: California Dept. of Water Resources (ongoing) and UC Statewide IPM Project (1998, 1999)
Programmed by: Karl Krist and Bryon Noel, ANR Communication Services (2001 - present), Steve Edberg (1999 - 2001), and Andrew Corbett, UC IPM (1998)
Update 2009: The Chilling Portions Model (Dynamic Model) was updated to correct minor errors, thanks to the efforts of Franz Niederholzer, Ph.D., UCCE Orchard Systems Farm Advisor, Sutter-Yuba Counties, and Karl Krist and Bryon Noel, Programmers, ANR Communcation Services.

Harvest Prediction Model

Support: Cling Peach Growers Advisory Board (1999)
In Cooperation with: California Dept. of Water Resources (ongoing)
Programmed by: Karl Krist and Bryon Noel, ANR Communication Services (2001 - present), and Steve Edberg (1999 - 2001)
Update 2009: Additions to the Harvest Prediction Model included details of the Calculation Methods and discussion of Growing Degree Hours, provided by Theodore DeJong, Ph.D., UCCE Pomologist-AES and Plant Physiologist-AES and Katherine Jarvis-Shean, Graduate Student in Horticulture and Agronomy, both in the UCDavis Department of Plant Sciences

Almond Hull-split Prediction Model (beta testing, Fall 2011)

The Almond Hull-split Prediction Model, was developed by Theodore DeJong Ph.D., Professor and CE Pomologist, Department of Plant Sciences, University of California, Davis
Programmed by: Bryon Noel, ANR Communication Services (2011)

Pistachio Bloom Cast (beta testing, Fall 2011)

Support: California Pistachio Research Board (2011)
This model was developed by Küden, A.B., Kaska, N., Tanriver, E., Tekin, H. and Ak, B.E., all researchers in Turkey. It was compared with a number of other bloom models by Katherine Jarvis-Shean and David da Silva, PhD, both of the UC Davis, using real bloom data provided by Craig Kallsen from the UC Pistachio Breeding Program, and predictions generated with hourly data from CIMIS stations.
Programmed by: Bryon Noel, ANR Communication Services (2009)

Prune Chilling Prediction Model (beta testing, Fall 2009)

The Prune Chilling Prediction Model, was developed using the chill calculation methodology of the Dynamic Model, by Franz Niederholzer, Ph.D., UCCE Orchard Systems Farm Advisor, Sutter-Yuba Counties
Programmed by: Karl Krist and Bryon Noel, ANR Communication Services (2009)