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Research and IPM

Interactive Tools and Models: Citrus Thrips Scarring Prediction Model—Testing Phase*
San Joaquin Valley, California

This model, validated so far only in Tulare County, California, is a first step in developing a reliable prediction of citrus thrips damage with advance warning. It estimates the degree of first scarring of Navel oranges by citrus thrips, Scirtothrips citri, from weather data that accumulates prior to petal fall.

*Validation of this model has been limited, and you are encouraged to test the model to see if it is helpful to you under your field conditions. You can also help us to test and improve the model. Disclaimer: The University of California and the authors of this model do not assume any responsibility and cannot be held liable for any loss that may result from using predictions from this model.

Estimates for active stations in counties:
| Fresno | Kern |  Madera | Tulare |
Choose year
Or use your own weather data  

Predictions are based on actual weather data. When a prediction is available for a station (usually between March 17 and the end of April), it is posted here.

County Active Weather Stations 2009
Estimated damage
Days with estimated temperatures
Fresno CARUTHERS-01.P, CAR 43.8% 0 of 93 days
Coalinga, NCDC #1864 38.6% 4 of 85 days
Del_Rey/Fowler-01.P, DELF 47.2% 0 of 94 days
EASTON-01.P, EAS 49.0% 0 of 95 days
Firebaugh/Telles, CIMIS #7 48.1% 0 of 94 days
Five Points/WSFS USDA, CIMIS #2 50.0% 0 of 98 days
Five Points, NCDC #3083 47.5% 34 of 88 days
Fresno State, CIMIS #80 44.8% 1 of 96 days
Fresno Yosemite International Airport, NCDC #3257 24.9% 5 of 90 days
Five Points South West, CIMIS #190 49.2% 1 of 92 days
KERMAN-01.P, KER 48.6% 0 of 95 days
KINGSBURG-01.P, KNG 47.0% 0 of 93 days
Kearney_Ag_Ctr-01.P, KAC 47.6% 0 of 94 days
Laton_North-01.P, LATN 49.6% 2 of 93 days
Orange Cove, CIMIS #142 50.0% 2 of 99 days
Panoche, CIMIS #124 45.3% 0 of 97 days
Parlier, CIMIS #39 46.3% 1 of 95 days
SAND_RANCH-01.P, SR1 49.5% 0 of 92 days
Westlands, CIMIS #105 50.0% 0 of 91 days
 
Kern Arvin-Edison, CIMIS #125 44.8% 1 of 87 days
Bakersfield WSO Airport, NCDC #0442 12.4% 0 of 77 days
Blackwells Corner, CIMIS #54 47.0% 4 of 93 days
Famoso, CIMIS #138 48.3% 1 of 96 days
Belridge, CIMIS #146 41.5% 3 of 89 days
Shafter/USDA, CIMIS #5 48.3% 0 of 90 days
Wasco, NCDC #9452 34.5% 32 of 84 days
 
Madera FIREBAUGH/ALISO-01.P, FRBA 49.8% 0 of 94 days
Madera, CIMIS #145 50.0% 1 of 99 days
Madera, NCDC #5233 44.9% 3 of 95 days
Madera, Touchtone #32 8.8% 0 of 84 days
Madera_North-01.P, MADN 49.8% 0 of 99 days
Ripperdan-02.P, RIP 49.9% 0 of 96 days
 
Tulare Alpaugh, CIMIS #203 50.0% 0 of 93 days
Delano, CIMIS #182 48.9% 0 of 89 days
Lindcove, CIMIS #86 48.0% 1 of 94 days
Lindsay, NCDC #4957 49.7% 6 of 91 days
Porterville, CIMIS #169 50.0% 2 of 98 days
Visalia, NCDC #9367 15.4% 8 of 97 days

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