Why Are Grapes Rejected for Export?

The 3 Most Common Reasons – And How UVASYS Can Help Prevent Them

Table grapes are one of Greece’s most valuable agricultural export products. However, a significant number of shipments are rejected due to quality issues, resulting in financial loss and reputational damage for producers and exporters.

In this article, we explore the three main causes of rejection and how the UVASYS preservation sheet can be a powerful ally in preventing them.

1. Fungal Infections – Botrytis cinerea (Grey Mould)

Post-harvest fungal development is the leading reason for grape rejections. Even grapes of excellent quality can spoil during storage or transit due to Botrytis, especially under poor humidity control.

Solution: UVASYS – Controlled SO₂ Release Against Botrytis

UVASYS is a preservation sheet placed inside grape packaging that gradually releases sulphur dioxide (SO₂). This helps prevent and control fungal development, particularly Botrytis, without altering the appearance or taste of the fruit. It is considered as a preservative, not a fungicide.

2. Uneven Ripening or Colour Deviation

Export markets demand grapes that are uniform in colour, maturity, and size. Batches with visual inconsistencies often fail to meet quality standards and are deemed non-marketable.

What to focus on:

• Choosing the right harvest time
• Careful sorting and grading
• Proper field management to ensure uniformity

3. Inadequate Packaging & Temperature Fluctuations

Poor packaging or lack of preservation measures during storage and transport often result in loss of firmness, dehydration, or fungal growth.

UVASYS ensures product stability during transit

Placed directly inside each box, UVASYS enhances shelf life and maintains quality, even under challenging storage or shipping conditions. It supports the preservation process and protects the market value of your produce. The active ingredient of UVASYS is a food additive in EU, used to keep the freshness of table grapes.

UVASYS Technology: Effective Post-Harvest Protection

UVASYS:

• Provides preventive and curative protection against Botrytis
• Is easy to apply and requires no special equipment
• Complies with international food safety and export standards
• Does not alter the organoleptic properties of the grapes
• Helps reduce rejection rates and financial losses

Best Practices for Successful Grape Exports 

• Carefully inspect all batches before shipment
• Use UVASYS in every export box
• Maintain a stable cold chain
• Work with reliable packaging and preservation suppliers

Protect the value of your grapes with UVASYS. Reduce rejections. Improve shelf life.
Learn more here: https://www.hellagro.gr/en/product/plastic-grape-preservative-uvasys/