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Research and IPM

Phenology Model Database

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Metaseiulus occidentalis

Scientific name: Metaseiulus occidentalis (A spider mite predator)

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

Tanigoshi, L. K., S. C. Hoyt, R. W. Browne, and J. A. Logan. 1975. Influence of temperature on population increase of Metaseiulus occidentalis (Acarina: Phytoseiidae). Ann. Ent. Soc. Amer. 68: 979-986.

Location of study: Wenatchee, Washington (laboratory studies)

Developmental thresholds
Lower:48.0°F( 8.9°C)
Upper:89.6°F(32.0°C)

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

Degree-day accumulations required for each stage of development
Host: McDanieli spider miteDD (°F)DD (°C)
Generation time (egg to egg):430.4239.1

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