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Research and IPM

Phenology Model Database


Fruittree Leafroller

Scientific name: Archips argyrospilus

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

Judd, G. J. R., M. G. T. Gardner, and D. R. Thomson. 1993. Temperature-dependent development and prediction of hatch of overwintered eggs of the fruittree leafroller, Archips argyrospilus (Walker) (Lepidoptera: Tortricidae). Can. Entomol. 125: 945-956.

Location of study: Kelowna, B. C. (laboratory and field studies)

Developmental thresholds

Method of calculation:Double Sine
Cutoff method:Horizontal Cutoff

Degree-day accumulations required for each stage of development

Start date: February 1

Host: ApplesDD (°F)DD (°C)
50% egg hatch:277.2154.0

Statewide IPM Program, Agriculture and Natural Resources, University of California
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