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Research and IPM

Phenology Model Database

| More models | Calculate degree-days |

Sweet Corn

Scientific name: Zea mays

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

Coop, L. B., B. A. Croft, and R. J. Drapek. 1993. Model of corn earworm (Lepidoptera: Noctuidae) development, damage, and crop loss in sweet corn. J. Econ. Entomol. 86(3): 906-916.

Location of study: Western Oregon (field studies)

Developmental thresholds
Lower:50F(10°C)
Upper:86F(30°C)

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

Degree-day accumulations required for each stage of development

Biofix: Count from planting

 DD (°F)DD (°C)
Tassel length 12 cm:884491
5% silks emerged:1004558
50% silks emerged:1062590
95% silks emerged:1145636
Ears with silks 50% brown: 1289716
Mature for fresh market: 1539855
Mature for processing: 1597887

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