How to Manage Pests

Degree-days: Orange Tortrix in Grapes

Use this program to run a model of orange tortrix in grapes, 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.

Orange Tortrix in Grapes

Lower/upper threshold: 43/78°F
Calculation/upper cutoff method: single sine/horizontal
Biofix: The biofix is the date of the lowest trap catch (from traps placed in December).
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 orange tortrix, 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 biofix is the date of the lowest trap catch (from traps placed in December).
End date:

Text file (comma or tab delimited) format

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