Technology responds to the challenge of preserving avocados

September 18, 2026

The expansion of avocados into increasingly distant markets poses a challenge that begins when the fruit is harvested and continues even after processing: how to extend its shelf life without compromising quality.

In the fresh market, sea voyages can last up to four weeks, a period during which the avocado continues its metabolic activity. In processed products, however, the pulp's exposure to oxygen introduces challenges related to browning, oxidation, and food safety.

According to Jorge León, a Technical Consultant specializing in Food Technology, responding to both scenarios requires combining rigorous control of variables such as temperature, atmosphere, maturity and packaging with technologies capable of extending the product's shelf life.

A fruit that continues to change after harvest

The Hass avocado is a climacteric fruit and its behavior after harvest constitutes one of the main challenges for long-distance shipments.

León explains that even under refrigeration and controlled atmosphere, the fruit maintains its metabolic respiration and ethylene production, a compound closely related to the ripening process.

Technical evidence supports this challenge. The Postharvest Research and Extension Center at UC Davis notes that avocado ethylene production begins after harvest and increases significantly during ripening. Furthermore, it indicates that controlled atmospheres can reduce respiration rates and ethylene production, as well as delay softening and color changes.

Under specific controlled atmosphere conditions, UC Davis reports that green-ripe Hass avocados can be stored for up to nine weeks at temperatures between 5°C and 7°C and subsequently complete ripening with good quality. However, conditions must be carefully adjusted, as unsuitable temperatures or gas concentrations can also damage the fruit.

According to León, variables such as temperature, gas concentration, and dry matter content must be considered during long journeys. Improper handling can accelerate fruit ripening and cause it to reach its optimal consumption point before completing the commercial chain.

Processing changes the challenge

When avocados move from the fresh market to processing, other variables come into play. Removing the peel and seed leaves the pulp exposed to oxygen, promoting phenomena such as browning and oxidation.

According to León, the industry uses different strategies to reduce these processes, including vacuum packaging, oxygen barrier materials, and inert gases such as nitrogen.

Also noteworthy is the use of acidulants such as lemon juice, citric acid, or ascorbic acid. These lower the pH of the pulp and act as an additional barrier to promote product stability and limit microbial growth.

In this scenario, preservation no longer depends solely on the management of ripening and also involves factors such as formulation, hygiene, oxygen exposure, packaging, and temperature.

HPP expands conservation alternatives

Among the technologies that have gained ground in recent decades is high hydrostatic pressure (HPP) , applied to processed products such as pulp and guacamole.

The system subjects the pre-packaged food to high pressure for short periods. León cites treatments of approximately 85,000 psi for about 180 seconds as a reference point.

The parameters are consistent with internationally evaluated applications. Health Canada analyzed avocado pulp and guacamole subjected to 600 MPa, approximately 87,000 psi, for a minimum of three minutes, concluding that the evaluated treatment reduces the microbial flora present and extends refrigerated shelf life without generating food safety concerns in these products.

(*) MPa (megapascals) and psi (pounds per square inch) are units used to measure pressure.

"Determining the effect of high hydrostatic pressure on the refrigerated stability of avocado puree," by Sinan Uzunlu, a study published on October 3, 2024, in the scientific journal Food Production, Processing and Nutrition . It also evaluated avocado puree treated at 600 MPa for three minutes and subsequently stored at 4 °C for 28 days, reinforcing the potential of this technology to extend the refrigerated stability of derived products.

For Jorge León, one of the advantages of HPP is that it allows intervention to address product deterioration without resorting to the high temperatures characteristic of conventional heat treatments. However, its implementation also represents an investment that may limit access for some companies.

Therefore, he warns that technology does not replace basic aspects such as good manufacturing practices, hygiene, packaging, and oxygen exposure control.

There is no single formula for extending lifespan

Storage conditions ultimately depend on the type of product, its formulation, processing, and commercial destination.

León points out that, under suitable conditions, certain processed avocado products can have a shelf life of up to 70 days when refrigerated between 2°C and 6°C. However, available evidence shows that these periods can vary considerably depending on the formulation and treatment used, so there is no single shelf life applicable to all avocado derivatives. For example, a 2024 study on puree treated with HPP evaluated its stability for 28 days at 4°C.

Freezing represents another alternative to extend preservation for longer periods, although León warns that it can generate changes in texture after thawing and, therefore, should be evaluated according to the final use of the product.

From controlling a fruit that continues to evolve for weeks in transit to extending the stability of a pulp or guacamole, preservation goes through different links in the chain and does not depend on a single technology.

Controlling post-harvest variables, good processing practices, and tools like HPP are all part of the same quest: to gain time without compromising the characteristics that determine the quality of the avocado.

In an industry that seeks to supply increasingly distant destinations and expand its range of derivative products, this capacity takes on a relevant role in defining how far, and under what conditions, the product can reach.