2018 California

Evaluation of leaf carbon isotopes and functional traits in avocado reveals water-use efficient cultivars

Authors: Acosta-Rangel, A.; Ávila-Lovera, E.; De Guzman, M.; Torres, L.; Haro, R.; Arpaia, M.L.; Focht, E.; Santiago, L.

Plant water-use efficiency (WUE) describes the ratio of carbon gain to water loss during photosynthesis. It has been shown that WUE varies among crop genotypes, and crops with high WUE can increase agricultural production in the face of finite water supply. We used measures of leaf carbon isotopic composition to compare WUE among 24 cultivars of Persea americana Mill (avocado) to determine genotypic variability in WUE, identify potentially efficient cultivars, and to better understand how breeding

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2022 California

Losing Aguacate: What If Water Costs Kill Avocado Farming in San Diego County?

Authors: Balikian, R.; Genskow, K.

San Diego County is categorized as urban, yet it was one of only three counties in the United States with over 5,000 farm operations in 2017. While continuing to expand its urban area, the county lost farmland at the rate of 3.8% every year between 2002 and 2017. By several measures, avocado production is the county's most important crop, and avocado groves account for about 30% of all crops planted there. Avocado acreage is also declining rapidly in the county, at about 3% each year. To understand

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2018 California

Environmental evaluation of high-value agricultural produce with diverse water sources: case study from Southern California

Authors: Bell, E.; Stokes-Draut, J.; Horvath, A.

Meeting agricultural demand in the face of a changing climate will be one of the major challenges of the 21st century. California is the single largest agricultural producer in the United States but is prone to extreme hydrologic events, including multi-year droughts. Ventura County is one of California's most productive growing regions but faces water shortages and deteriorating water quality. The future of California's agriculture is dependent on our ability to identify and implement alternative

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2000 California

Long-Term Evapotranspiration from Coastal Avocado/Citrus Orchard

Authors: Grismer, M.

Very limited citrus and avocado orchard evapotranspiration data are available, and practically no published information is available considering citrus/avocado evapotranspiration ETc on steeply sloping fields in coastal climates. Often the data available are from measurements based on limited time periods, and season-to-season orchard water use variability is unknown. The objective of this project was to obtain such long-term-field ETc data. Of particular interest was determination of the monthly

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2003 California

The economic impact of Scirtothrips perseae Nakahara (Thysanoptera : Thripidae) on California avocado production

Authors: Hoddle, M.S.; Jetter, K.M.; Morse, J.G.

In 1996, Scirtothrips perseae Nakahara (Thysanoptera: Thripidae) invaded California avocado orchards and moved pest management practices that relied almost exclusively on biological control to strategies dependent on insecticides to maintain thrips densities below economically damaging levels. By 1998, average losses due to thrips feeding damage in untreated infested groves reduced industry revenues by 12%. Producer costs increased by about 4.5% when S. perseae populations required management. In

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2007 California

Salinity and water effects on 'Hass' avocado yields

Authors: Oster, J.; Stottlmyer, D.E.; Arpaia, M.L.

A field experiment was conducted between 1992 and 1997 in a commercial orchard of mature 'Hass' avocados on Mexican seedling rootstock (Persea antericana Mill.) to determine how yield was influenced by the amount of irrigation water applied and the frequency of application. Three amounts of water (targeted at 90%, 110%, and 130% of estimated crop evapotranspiration) were applied at three frequencies (one, twice, and seven times per week) with microsprinklers located beneath the tree canopy. The site

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