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How to Manage Pests

Degree-days: Peach Twig Borer

Use this program to run a model of peach twig borer, 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.

Peach Twig Borer

  • Lower/upper threshold: 50/88°F
  • Calculation/upper cutoff method: single sine/horizontal
  • Biofix: The first biofix is the first date that moths are consistently found in traps.

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 peach twig borer, 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): The first biofix is the first date that moths are consistently found in traps.
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

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