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Phenology Model Database

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Sod Webworm

Scientific name: Pediasia (Crambus) trisecta

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

Tolley, M. P., and W. H. Robinson. 1986. Seasonal abundance and degree-day prediction of sod webworm (Lepidoptera: Pyralidae) adult emergence in Virginia. J. Econ. Entomol. 79: 400-404.

Location of study: Virginia (field studies)

Developmental threshold
Lower:50F(10°C)

Method of calculation: Single Sine

Degree-day accumulations required for each stage of development

Start date: January 1

Host: TurfgrassDD (°F)DD (°C)
50% adult emergence (flight peak):380-488211-271
First generation to second generation: 974-1098541-610
Second generation to third generation:1314-1343730-746

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