How to Manage Pests

Degree-days: California Red Scale in Citrus

Use this program to run a model of california red scale in citrus, 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.

California Red Scale in Citrus

Lower threshold: 53°F
Calculation/upper cutoff method: single sine/horizontal
Biofix: user specified.
Additional information on using this model: Pest Management Guideline

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 california red scale, 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:		Biofix (start date): user specified.

Text file (comma or tab delimited) format

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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 How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. web template revised: November 24, 2009 Contact webmaster.