impact

HLB Quarantine Expansions Impact California Citrus

Daniel CooperCalifornia Corner, HLB Management, Regulation

Effective immediately, the U.S. Department of Agriculture Animal and Plant Health Inspection Service (APHIS) announced it was expanding the HLB quarantined area in California. The action was made on Sept. 1 in cooperation with the California Department of Food and Agriculture (CDFA). APHIS is adding 1 square mile to the Santa Paula quarantined area in Ventura County, which impacts 151.7 …

orange scab

Sweet Orange Scab Quarantine Expansion

Daniel CooperCalifornia Corner, Diseases, Regulation

The California area quarantined for sweet orange scab (SOS) in the Burbank, Los Angeles and Long Beach areas of Los Angeles County and the Anaheim and Garden Grove areas of Orange County has been expanded. The expansion was made by the U.S. Department of Agriculture Animal and Plant Health Inspection Service (APHIS) in cooperation with the California Department of Food …

Imperial County

HLB Confirmed in Imperial County for First Time

Daniel CooperCalifornia Corner, Diseases, Regulation

California Department of Food and Agriculture (CDFA) and U.S. Department of Agriculture (USDA) officials have confirmed the detection of HLB in one tree in a residential property in the city of Calexico, Imperial County, California. This is the first HLB detection in a tree in Imperial County. In November 2025, an Asian citrus psyllid (ACP) was confirmed positive in Imperial …

acreage report

California Citrus Acreage Report Released

Daniel CooperAcreage, California Corner

California has an estimated 266,300 acres of bearing citrus, up just 200 acres in the past four years. That’s according to an acreage report released Aug. 5 by the California Department of Food and Agriculture and the U.S. Department of Agriculture National Agricultural Statistics Service (NASS). The major source of the acreage data was a questionnaire mailed to all California …

California

Quarantine Updates for California

Daniel CooperDiseases, Pests, Regulation

Federal and state agriculture officials have taken actions regarding Mediterranean fruit fly (Medfly) and sweet orange scab (SOS) quarantines in California. The U.S. Department of Agriculture Animal and Plant Health Inspection Service (APHIS) in cooperation with the California Department of Food and Agriculture (CDFA) updated the quarantines. MEDFLY QUARANTINE REMOVED The agencies removed the Medfly quarantine in Alameda and Santa …

expansion

California Growers and Nurseries Affected by Quarantine Expansions

Daniel CooperCalifornia Corner, HLB Management, Regulation

The California Department of Food and Agriculture (CDFA) has expanded the huanglongbing (HLB) quarantine boundary in San Diego County following the confirmation of one HLB-positive residential citrus tree in Fallbrook. CDFA is also expanding the Asian Citrus Psyllid (ACP) Bulk Citrus Regional Quarantine Zone 6 to reflect the HLB quarantine boundary expansion. A map of the expanded boundary can be …

Medfly

California Medfly Infestation Eradicated

Daniel CooperCalifornia Corner, Pests

State, local and federal agriculture officials have eradicated a Mediterranean fruit fly (Medfly) infestation centered in and around the City of San Jose, California. The eradication ends a 241-square-mile quarantine that began on Aug. 19, 2025. The California Department of Food and Agriculture (CDFA), the U.S. Department of Agriculture (USDA), and the Santa Clara County and Alameda County agricultural commissioner’s …

San Joaquin

Citrus Yellow Vein Clearing Virus Confirmed in San Joaquin County

Daniel CooperCalifornia Corner, Diseases

The U.S. Department of Agriculture Animal and Plant Health Inspection Service and the California Department of Food and Agriculture (CDFA) confirmed the positive identification of citrus yellow vein clearing virus (CYVCV) in a residential citrus tree in the Lodi area of San Joaquin County. The plant sample was confirmed positive for CYVCV on July 7 following a routine multi-pest survey …

glassy-winged sharpshooter

California Responds to Glassy-Winged Sharpshooter

Daniel CooperCalifornia Corner, Pests

The California Department of Food and Agriculture (CDFA) is responding after invasive glassy-winged sharpshooter (GWSS) insects were found on shipments of grapevines sold at select Costco locations in Northern California between April 21 and May 19. GWSS spreads the bacterium that causes Pierce’s disease, a fatal grapevine disease that threatens California vineyards. It can also damage citrus trees, landscape plants …

Scab

California Sweet Orange Scab Quarantine Expanded

Daniel CooperCalifornia Corner, Diseases, Regulation

The U.S. Department of Agriculture Animal and Plant Health Inspection Service (APHIS) in cooperation with the California Department of Food and Agriculture (CDFA) have expanded the area quarantined for sweet orange scab (SOS). The expansion is in the Irvine area of Orange County and in the La Puente area of Los Angeles County in California. QUARANTINE ACTIONS APHIS is expanding …

Mexfly

Mexfly Quarantine Established and Expanded in California

Daniel CooperCalifornia Corner, Pests, Regulation

Agriculture officials on March 5 established a Mexican fruit fly (Mexfly) quarantine in La Mesa, San Diego County, California, designated the La Mesa quarantine. On March 10 they expanded the quarantine. The U.S. Department of Agriculture Animal and Plant Health Inspection Service (APHIS) and the California Department of Food and Agriculture (CDFA) established the La Mesa quarantine in response to …

Valencia

California Valencia Orange Forecast

Daniel CooperCalifornia Corner, Crop Forecast

The March forecast for California’s 2025–26 Valencia orange crop is 17 million 40-pound cartons. The forecast is based on the results of the 2025–26 Valencia Orange Objective Measurement Survey, which was conducted from Jan. 10 to Feb. 10. The California Department of Food and Agriculture (CDFA), in cooperation with the U.S. Department of Agriculture National Agricultural Statistics Service, prepared the …

Imperial County

First Psyllid in Imperial County Tests Positive for HLB Bacteria

Daniel CooperCalifornia Corner, Psyllids

An adult Asian citrus psyllid (ACP) sample collected from a rural residential property in Imperial County has tested positive for Candidatus Liberibacter asiaticus (CLas), the bacteria that causes huanglongbing (HLB). The ACP sample was collected from a citrus tree on Oct. 30 and was confirmed positive for CLas on Nov. 13. This is the first confirmed CLas-positive adult ACP found …

California citrus

California Mandarin Forecast Issued

Daniel CooperCalifornia Corner, Crop Forecast

The 2025–26 California forecast for Tango and W. Murcott Afourer mandarin varieties, released Sept. 12, is 33 million 40-pound cartons. The forecast came from the California Department of Food and Agriculture (CDFA), cooperating with the U.S. Department of Agriculture National Agricultural Statistics Service (USDA NASS). The forecast is based on the results of the 2025–26 Mandarin Objective Measurement Survey, which …

Navel

California Navel Orange Forecast Announced

Daniel CooperCalifornia Corner, Crop Forecast

The initial 2025–26 California navel orange forecast is 80 million cartons, up 6% from the previous year. It was issued Sept. 12 by the California Department of Food and Agriculture (CDFA), cooperating with the U.S. Department of Agriculture National Agricultural Statistics Service. The forecast is based on results of the 2025–26 Navel Orange Objective Measurement Survey, conducted from June 12 …

medfly

New Medfly Quarantine in California

Daniel CooperCalifornia Corner, Pests, Regulation

A portion of Santa Clara County has been placed under quarantine for the Mediterranean fruit fly (Medfly) following the detection of two wild female flies in the city of San José. If not stopped, Medflies can devastate fruits and vegetables by reproducing and leaving larvae in produce. The invasive flies can then spread to other regions. A quarantine is a …

trip

Highlights From California Ag’s Trip to Brazil

Daniel CooperBrazil, California Corner

A recent Citrus Industry article reported on Brazil’s Fundecitrus hosting a delegation of agriculture leaders from California. The California Department of Food and Agriculture (CDFA) also reported on the trip, which included other venues in addition to Fundecitrus. Highlights from the CDFA report follow. During the trip to Brazil, the California delegation visited farms, packinghouses, research facilities and business incubators …

medfly

Medfly Eradicated From California

Daniel CooperCalifornia Corner, Pests

A Mediterranean fruit fly (Medfly) infestation centered in and around the city of Fremont, California, has been eradicated. The eradication ends a 213-square-mile quarantine that began Sept. 6, 2024. The California Department of Food and Agriculture (CDFA), the U.S. Department of Agriculture (USDA) and the Alameda County agricultural commissioner’s office accomplished the eradication. CDFA used the release of sterile male …

Arizona

Citrus Greening Quarantines Expanded in California

Daniel CooperCalifornia Corner, HLB Management, Regulation

Federal and state agriculture officials recently expanded the areas quarantined for citrus greening disease in California. They expanded the quarantined area in the Coto de Caza area of Orange County by 11 square miles, the Rancho Santa Margarita area of Orange County by 93 square miles, the Perris area of Riverside County by 37 square miles, and the Rancho Cucamonga …

Oriental Fruit Fly

Oriental Fruit Fly Quarantine Lifted

Daniel CooperCalifornia Corner, Pests, Regulation

The Oriental fruit fly quarantine in California’s Orange County has been lifted following the eradication of the invasive pest. The California Department of Food and Agriculture (CDFA), in partnership with the U.S. Department of Agriculture (USDA) and the Orange County agricultural commissioner, announced the action. The Oriental fruit fly is known to infest more than 250 types of fruits and …