Seasonal and migrant agricultural wage labor in California (1900–1945)

  1. Growers expand labor-contracting for seasonal harvests

    Labels: Labor contractors, California growers

    By the early 1900s, California’s large fruit, vegetable, and specialty-crop farms depended on short, intense harvest seasons. Growers often hired workers through labor contractors, which made it easy to recruit and move crews quickly—but also made wage theft and poor camp conditions common problems. This set the stage for recurring conflicts over pay, housing, and basic rights for migrant farmworkers.

  2. Gentlemen’s Agreement limits Japanese labor immigration

    Labels: Gentlemen s, Japanese immigrants

    The Gentlemen’s Agreement between the United States and Japan limited the emigration of Japanese laborers to the U.S. while avoiding a formal exclusion law. In California agriculture, this policy helped reshape who could enter the seasonal labor market and increased pressure on other groups—especially those already in the state—to fill harvest jobs. It also fueled political debates about Asian labor and landownership.

  3. California enacts Alien Land Law

    Labels: Alien Land, California legislature

    California’s Alien Land Law, signed on May 17, 1913, limited the ability of “aliens ineligible to citizenship” to own or lease agricultural land. Although farm laborers were the focus of many growers’ recruiting efforts, this law targeted pathways for immigrant families—especially Japanese immigrants—to become independent farmers. The policy reinforced a farm economy where many workers remained wage laborers rather than landowners.

  4. Wheatland Hop Riot exposes labor camp conditions

    Labels: Wheatland Hop, Durst Ranch

    On August 3, 1913, a strike at the Durst Ranch hop harvest near Wheatland turned into a deadly confrontation, killing four people. The event drew statewide attention to overcrowded camps, low wages, and the lack of sanitation for migrant harvest workers. It became a turning point that pushed California toward closer oversight of labor camps.

  5. Immigration Act creates “Asiatic Barred Zone”

    Labels: Immigration Act, Congress

    On February 5, 1917, Congress overrode President Woodrow Wilson’s veto and enacted the Immigration Act of 1917. The law imposed a literacy test and barred immigration from a large “Asiatic Barred Zone,” tightening the flow of potential farmworkers from many parts of Asia. Over time, these restrictions helped increase growers’ reliance on workers already in the U.S. and on migration from Mexico.

  6. Immigration Act of 1924 sharply reduces Asian entry

    Labels: Immigration Act, federal quotas

    Federal immigration restrictions expanded again in 1924, helping end most immigration from Asia and tightening national-origin quotas. For California agriculture, fewer new arrivals from Asia meant the seasonal labor system increasingly depended on internal migration and cross-border Mexican migration. The law also encouraged employers and labor contractors to compete more intensely over existing workers during peak harvests.

  7. Mexican Repatriation reduces farm labor during Depression

    Labels: Mexican Repatriation, Great Depression

    From 1929 through the 1930s, government-driven and locally driven “repatriation” campaigns pressured hundreds of thousands of Mexicans and Mexican Americans to leave the United States. In California, this disrupted communities that supplied much of the seasonal farm workforce and increased insecurity for remaining workers. The program also shows how immigration enforcement and economic crisis could directly reshape agricultural wage labor.

  8. Imperial Valley lettuce strike tests farmworker organizing

    Labels: Imperial Valley, lettuce workers

    In January 1930, thousands of lettuce workers struck in California’s Imperial Valley over wages, hours, and abuses by labor contractors. The strike ended in defeat, with arrests and repression, showing how hard it was for seasonal farmworkers to sustain organization across short harvest seasons and dispersed camps. Even so, it became an important early example of coordinated action among largely migrant crews.

  9. CAWIU helps lead 1933 wave of farm strikes

    Labels: CAWIU, 1933 strike

    In 1933, a wave of strikes spread across California agriculture, involving tens of thousands of workers—many of them Mexican and Filipino—seeking higher pay and better conditions. The Cannery and Agricultural Workers’ Industrial Union (CAWIU) played a leading organizing role in many actions. This strike wave demonstrated both the power and the vulnerability of seasonal workers facing grower resistance and local policing.

  10. Pixley and Arvin violence escalates cotton strike

    Labels: Pixley shootings, Arvin violence

    On October 10, 1933, shootings during the San Joaquin Valley cotton strike killed multiple people in Pixley and near Arvin, as armed growers and their allies confronted striking workers. The violence drew public attention and added pressure for mediation and relief support during the broader strike wave. It also showed how quickly labor disputes in seasonal agriculture could turn deadly when workers had little legal protection.

  11. Associated Farmers form to counter farmworker unions

    Labels: Associated Farmers, grower organization

    On March 28, 1934, agricultural and business leaders helped organize the Associated Farmers of California to prevent a repeat of the 1933 strike wave. The organization supported anti-picketing measures, close coordination with law enforcement, and aggressive tactics against organizers. This strengthened growers’ ability to control seasonal labor markets and made open organizing more difficult in many farming regions.

  12. Federal migrant camp at Weedpatch opens

    Labels: Weedpatch Camp, Federal migrant

    During the Dust Bowl-era migration, the federal government built the Arvin Federal Government Camp (often called Weedpatch) to improve housing, sanitation, and safety for migrant farmworker families. The camp became a model for more regulated living conditions compared with informal “squatters’ camps.” It also shaped public understanding of migrant labor by providing a visible example of how living conditions affected health, schooling, and workers’ stability.

  13. The Grapes of Wrath publicizes migrant farm labor

    Labels: The Grapes, John Steinbeck

    On April 14, 1939, John Steinbeck’s novel The Grapes of Wrath was published, bringing national attention to Dust Bowl migration and the hardships of farm labor in California. While fiction, the book shaped public debate about wages, policing, and living conditions in agricultural labor camps. The controversy also highlighted how central seasonal and migrant labor had become to California’s farm economy.

  14. Executive Order 9066 removes Japanese Americans from farms

    Labels: Executive Order, Japanese American

    On February 19, 1942, Executive Order 9066 authorized forced removal from the West Coast, leading to incarceration of Japanese Americans. In California, this abruptly displaced many farm operators and farmworkers, disrupting established labor networks and creating new labor shortages. The change intensified growers’ push for alternative sources of seasonal workers during World War II.

  15. U.S.–Mexico agreement launches Bracero Program

    Labels: Bracero Program, U S

    On August 4, 1942, the United States and Mexico signed the Mexican Farm Labor Agreement, beginning what became known as the Bracero Program. The program brought Mexican workers to U.S. farms on temporary contracts, reshaping seasonal agricultural wage labor in California during wartime. It formalized a large-scale guest-worker system that would outlast World War II and influence farm labor relations for decades.

  16. World War II labor policies entrench migrant wage-labor system

    Labels: World War, migrant wage

    By the end of World War II in 1945, California agriculture had become even more dependent on a managed flow of seasonal and migrant wage labor, including braceros and domestic migrants. Wartime disruptions—especially incarceration of Japanese Americans—combined with federal recruitment to accelerate this shift. The result was a labor system with clearer government involvement but continued conflicts over wages, housing, and enforcement.

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Last Updated:Jan 1, 1980
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Seasonal and migrant agricultural wage labor in California (1900–1945)