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Fruit Size/Quality

2016 Research

In this research, we have modeled the relationships between leaf nutrient concentrations and the yields of avocado trees with the aim of developing decision support tools for improved fertilization and nutrient management to increase avocado fruit yields.

2011 Research

The increasing costs of inputs necessary for avocado production dictate that growers of the 'Hass' avocado in California increase profitability per acre. The goal of this research is to increase net income per acre by developing plant growth regulator (PGR) strategies that increase yield of commercially valuable fruit.

 

Competition from Mexico, Chile and other countries requires that the California avocado industry not only increase production per acre, but also increase fruit size to remain profitable. The goal of this research is to increase net income per acre for growers of the 'Hass' avocado in California by developing plant growth regulator (PGR) strategies that increase yield of commercially valuable large size fruit.

This study aims to define sensory attributes of California-grown ‘Hass’ avocado fruit. We will achieve this goal through a combination of sensory panel and GC-MS work to examine the relationship between changing perceptions of avocado fruit quality and measurable fruit volatiles. We believe that these results will aid our understanding of minimum and maximum maturity levels of Californian grown ‘Hass’ and ultimately lead to a refinement of the current standards for minimum maturity.

2010 Research

The goal of the research is to obtain the efficacy data necessary to add a PGR use for avocado to an existing PGR label. Given that avocado orchards alternate bear, the California Department of Pesticide Regulation (DPR) will accept yield benefits that are significant only in an on- or an off-crop year, as 2-year cumulative yield or when averaged across the on- and off-crop year.

 

The goal of this research is to increase net income per acre for growers of the 'Hass' avocado in California by developing plant growth regulator (PGR) strategies that increase yield of commercially valuable large size fruit. Given that avocado orchards alternate bear, the California Department of Pesticide Regulation (DPR) will accept yield benefits that are significant only in an on- or an off-crop year, as cumulative yield or when averaged across the on- and off-crop year.

2008 Research

This project is examining the effect of salinity on the yields of avocado trees across a transect of regions that represent all of the major growing areas for avocado in S. California. There are two components of salinity stress on avocado, including water stress that is caused by elevated levels of total dissolved salts (TDS), and specific ion toxicities that are caused by chloride and sodium.

California avocado growers must increase yield, including fruit size, and/or reduce production costs to remain competitive in the US market, which now receives fruit from Mexico, Chile, New Zealand, Dominican Republic and an increasing number of other countries (http://www.ers.usda.gov/Data/Fruit VegPhyto/Data/fr-avocados.xls). Despite the popularity, the ‘Hass’ cultivar (Persea americana Mill.) is known to be problematic with regard to fruit retention, fruit size and alternate bearing.

Competition from Mexico, Chile and other countries requires that the California avocado industry not only increase production per acre, but also increase fruit size to remain profitable. The goal of this research is to increase net income per acre for growers of the 'Hass' avocado in California by developing plant growth regulator (PGR) strategies that increase yield of commercially valuable large size fruit.

2007 Research

The goal of this research is to increase net income per acre for growers of the 'Hass' avocado in California. To meet this goal we are developing plant growth regulator
(PGR) strategies to increase total yield and yield of commercially valuable large size fruit and simultaneously collecting the efficacy data necessary to satisfy the
requirements of the California Department of Pesticide Regulation (DPR) to have the successful plant growth regulators added to an existing label so that they can be

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