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Phenology Model Database

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Carrot Weevil

Scientific name: Listronotus texanus

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

Woodson, W. D., and J. V. Eldelson. 1988. Developmental rate as a function of temperature in a carrot weevil, Listronotus texanus (Coleoptera: Curculionidae). Ann. Entomol. Soc. Am. 81: 252-254.

Location of study: Weslaco, Texas (laboratory studies)

Developmental thresholds

Lower: 56.0°F (13.3°C)

Upper: 86.0°F (30.0°C)

Method of calculation: Single Sine

Cutoff method: Horizontal Cutoff

Degree-day accumulations required for each stage of development

Host: Carrots DD (°F) DD (°C)

Eggs: 110.3 61.3

Larvae: 375.5 208.6

Prepupae: 126.7 70.4

Pupae: 137.3 76.3

Generation time: 783.5 435.3

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