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WSR-88D doppler radar detection of corn earworm moth migration
J K Westbrook1, R S Eyster, W W Wolf
1Areawide Pest Management Research Unit, USDA-ARS, 2771 F & B Road, College Station, TX, 77845-4966, USA, john.westbrook@ars.usda.gov.
International Journal of Biometeorology
|June 11, 2013
Summary
Weather Service Radar (WSR-88D) can track corn earworm moth migrations. This technology estimates insect concentration and wind speed, aiding pest management and improving weather forecasting accuracy.
Area of Science:
- Agricultural Entomology
- Meteorology
- Remote Sensing
Background:
- Corn earworm (CEW) moths migrate long distances, impacting crop production.
- Existing entomological radars have limited spatial coverage for monitoring migrations.
- The Weather Service Radar (WSR-88D) offers broad-area monitoring capabilities for various atmospheric phenomena.
Purpose of the Study:
- To assess the utility of WSR-88D radar data for monitoring corn earworm moth migrations.
- To correlate WSR-88D radar measurements with insect concentrations and wind data.
- To explore the potential of WSR-88D radar for areawide pest management.
Main Methods:
- Analyzed S-band WSR-88D radar data from Brownsville, Texas.
- Compared WSR-88D reflectivity with X-band radar estimates of insect concentration.
- Correlated WSR-88D wind velocity estimates with rawinsonde and pilot balloon measurements.
Main Results:
- WSR-88D radar reflectivity positively correlated with aerial insect concentration (r²=0.21).
- WSR-88D wind velocity estimates showed strong correlations with wind speed (r²=0.56) and direction (r²=0.63).
- Demonstrated WSR-88D's capability to estimate insect concentration and displacement.
Conclusions:
- WSR-88D radar data can estimate migratory flux of corn earworms and other nocturnal insects.
- This information can enhance areawide pest management strategies.
- Further research may improve WSR-88D operational meteorology by accounting for insect-related radar signal effects.

