Livestock and Natural Resources

UCCE Livestock & Natural Resources

New World Screwworm Detected in U.S.

Effective June 12, 2026, at 9:00 a.m. Pacific Time, the California Department of Food and Agriculture (CDFA) is implementing additional New World Screwworm (NWS) entry requirements for animals entering California from NWS affected areas. These requirements apply to livestock, poultry, camelids, equids, captive cervids, and companion animals, including dogs, cats, rabbits, pet psittacines, and domestic rodents. View more information from CDFA on the screwworm.

Welcome!

Our primary goal in preparing this site is to provide California's range and pasture livestock ranchers or managers with research-based information and publications on:

California Agriculture journal, October - December 2012, Volume 66, Issue 4. Photo by Sarah E. Moffitt.

Ecosystem Services
Irrigated pastures
Livestock and natural resource economics
Livestock health
Oak woodlands
Range livestock production and management
Range improvements and management
Rangeland hydrology, non-point source pollution and water quality
Wildlife management

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