Agri-Stats: Citrus



  • All cultivated species of citrus are from three ancestors: citrons, pomelos and mandarins, all native to Southeast Asia. 
  • All citrus are genetically compatible and highly prone to mutation. 
  • Insert history of navel oranges in Southern California


California’s citrus groves are a patchwork fo waxy green leaves that can be found all over southern California, the southern San Joaquin Valley and throughout the coastal areas.

Most oranges are grown commercially in southern California and the San Joaquin Valley. 

Lemons are grown on the coast and a few hundred acres grown in the Santa Lucia Highlands in Monterey County.

Some grapefruit are grown in California and some are grown on the coast. And while I like the VERY tart coastal grapefruit from one particular vendor at the Templeton Farmer’s Market, I must confess, I still prefer my Star Ruby grapefruit to come from South Texas. Terroir definitely matters for grapefruit. 

Threats to the Citrus Industry – Freeze, Drought and Huanglongbing! Oh My! 

A little information about 黃龍病  or “Yellow Dragon Disease” or Huánglóngbìng (HLB) or Citrus greening disease

  • A major threat to today’s Citrus industry all over the world, including California.
  • Caused by a vector-transmitted pathogen. 
  • The vector is the Citrus pysilld.
  • The causative agents are motile bacteria, Candidatus liberibacter app. 
  • Has devastated the Florida citrus industry
    • The 2016 harvest was less than half the 170 million boxes harvested in 2008. 
    • The 2017 crop is the smallest in 50 years as a result of HLB.
    • Orange juice futures surged 30% in 2017.

Books and References

Stone, Daniel. The Citrus Family Tree. National Geographic Magazine. February, 2017.

Monterey County 2017 Crop Report. Monterey County Agricultural Commissioner’s Office.