Tests Show Active Packaging Could Add Five Days to Table Grape Marketability

New post-harvest trials suggest an active-packaging technology could extend the marketable life of table grapes by nearly five days, potentially giving growers, shippers and retailers more flexibility as fruit moves through cold storage and distribution.

Fresh Inset said results from nine trials conducted in Italy, Greece, Spain and the United Kingdom showed its Vidre+ technology extended grape marketability by an average of 4.95 days, or roughly 35%, compared with untreated control fruit.

The analysis included 38 Vidre+ sticker variants and 354 paired quality comparisons involving varieties such as Italia, Soultanina, Aledo, Dominga and Sweet Celebration.

Vidre+ incorporates 1-methylcyclopropene, or 1-MCP, into packaging through a sticker, label or imprint. The compound is used to influence produce response to ethylene, a natural plant hormone associated with ripening and aging.

Fresh Inset said its approach allows 1-MCP to be delivered from within the package rather than requiring treatment in a specialized room.

The company reported improvements across several quality measures.

Visible stem, or rachis, browning was delayed by an average of 5.6 days. Berry shatter and damage were delayed by approximately 10.5 days, while deterioration linked to decay occurred about 4.8 days later.

Those individual results are separate quality measurements and should not be added together. The overall average improvement in marketable life across the trials was 4.95 days. That additional time could be meaningful for table grapes, which can spend weeks traveling from growing regions through cooling, shipping, warehousing and retail distribution before reaching consumers.

Stem browning, loose berries and decay can reduce the commercial value of a shipment even when much of the fruit remains edible. Extending marketable life could potentially reduce markdowns, rejected loads and product losses while providing retailers with additional selling time.

The trials involved several packaging formats and storage conditions, including traditional boxes, protective films and retail punnets.

Fresh Inset stressed that results can vary depending on grape variety, packaging, temperature and supply-chain conditions. The findings therefore represent performance under the conditions tested rather than a guarantee of an additional five days for every commercial grape program.

Still, the results highlight the growing role post-harvest technology could play in protecting fresh produce quality.

For grape suppliers and retailers, even a modest extension in marketability can have economic value when fruit is moving long distances or encountering delays.

As the industry looks for ways to reduce shrink and food waste without sacrificing quality, technologies that can add days to the selling window are likely to receive increasing attention.