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Research and IPM

Phenology Model Database

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="Pupa

Bathyplectes curculionis

Bathyplectes curculionis (a larval parasite of alfalfa weevil)

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

Eklund, L. R., and R. G. Simpson. 1977. Correlation of activities of the alfalfa weevil and Bathyplectes curculionis with alfalfa height and degree-day accumulation in Colorado. Environ. Entomol. 6: 69-71.

Location of study: Colorado (field studies)

Developmental threshold
Lower:43.0°F (6.1°C)

Method of calculation: not specified (UC IPM recommends Single Sine)

Degree-day accumulations required for each stage of development

Start date: March 1

  DD (°F)DD (°C)
Spring emergence from cocoons: 425.7236.5
Sumer generation time (adult to adult): 967.0537.2

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