Pistachio Nut Phenology
Pistachio Nut Phenology
Pistachio Nut Phenology
University of California
Pistachio Nut Phenology

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With the rise in interest in systems modelling there is an opportunity for pistachio growers to take advantage of new technologies to enhance their production. Management decisions have been made in other industries by using phenology models as tools.

For example, the pressure of the olive fly in olive production is only severe when the olive is 80 mm3 in size. This occurs once the trees are exposed to 1200 heat units post bloom. Therefore spraying for the pest before the crop has accumulated 1200 heat units is unnecessary.

Heat Unit Accumulation

Heat unit accumulation has been shown as a driver of development in fruit, especially well documented in peach and applied to almond production. We propose to expand the use of heat unit accumulation by characterizing nut growth as a function of heat units. Simultaneously, we will document stage development of the pistachio nut using biomarkers for the individual stages. By tracking this process stage development as a product of heat unit accumulation our research will be a tool in pest and disease control.

Field Updates

Lab Team!


Introducing... the Ferguson Pistachio Lab Team! From the left, Matthew Devera is a 1.5 year undergraduate who is an undeclared major, Natalie Ramirez is a recent graduate looking into nursing...

Posted on Monday, June 30, 2014 at 4:46 PM

ASHS Orlando Conference


Second presentation of the year! Come check out the poster of Pete 1 at the ASHS ORLANDO conference! I will also be speaking on the Pistachio Nut Phenology Monday July 28th at 4:00pm.

Posted on Monday, June 16, 2014 at 12:49 PM

Update 6/15/14

8 4 21 LH

Hello everyone! These posts will keep you updated on the progress of our 3 trials. I'll briefly introduce each one and state the current st ate of affairs here. Please email me with any concerns or...

Posted on Sunday, June 15, 2014 at 12:26 PM
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