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Research and IPM

Phenology Model Database

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Pear Rust Mite

Scientific name: Epitrimerus pyri

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

Bergh, J.C., and G.J.R. Judd. 1993. Degree-day model for predicting emergence of pear rust mite (Acari: Eriophyidae) Deutogynes from overwintering sites. Environ. Entomol. 22:1325-1332.

Location of study: British Columbia, Canada (laboratory and field studies)

Developmental threshold
Lower:42.8°F(6°C)

Method of calculation: Double Sine

Degree-day accumulations required for each stage of development

Biofix: March 1

Host: PearDD (°F)DD (°C)
Median emergence of deutogynes from overwintering sites: 11262

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