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How to Manage Pests

Degree-days: Cotton

Use this program to run a model of cotton, recommended by UC Cooperative Extension. In calculating degree-days, the program uses temperatures from the UC IPM weather database, a file you supply, or data you enter online.


  • Lower threshold: 60°F
  • Calculation/upper cutoff method: single sine/horizontal
  • Biofix: user specified.

Specify source of temperature data

Select the source of temperatures to be used to calculate degree-days. You may also use your own maximum and minimum temperatures and look up approximate daily degree-day values in a reference degree-day table for cotton, then total them yourself.

Select from stations in which California county?
Include active stations only
Set time period for running model
Biofix (start date):   Biofix (start date): user specified.
End date:
Text file (comma or tab delimited) format

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Statewide IPM Program, Agriculture and Natural Resources, University of California
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For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   web template revised: January 21, 2018 Contact webmaster.