Research and IPM
Phenology Model Database
Pistachio - Shell Hardening
Scientific name: Pistacia vera
Phenology models predict timing of events in an organism's development. For many organisms which cannot internally regulate their own temperature, development is dependent on temperatures to which they are exposed in the environment.Information in this database comes from published articles. It may be used in conjunction with field monitoring and a degree-day calculator.
Note: Before using a model that was not field tested in your location, you should test the model for one or more seasons under your conditions to verify that it will work for you.
Model 1 of 1
Purcell, M., and S. C. Welter. 1991. Effect of Calocoris norvegicus (Hemiptera: Miridae) on pistachio yields. J. Econ. Entomol. 84: 114-119.
Location of study: California (field studies)
Method of calculation: Single Sine
Degree-day accumulations required for each stage of development
Biofix: 75% bloom of pistachios