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A 鈥渉ighly damaging鈥� fruit fly from Asia is at risk of coming to France and could 鈥渞avage鈥� fruit and vegetable production, researchers at France鈥檚 food safety authority have warned.

A new report on the Oriental fruit fly, or Bactrocera dorsalis, has found that the 鈥渢hreat is real and must be taken seriously鈥�, said Christine Tayeh, coordinator at the Agence Nationale de S茅curit茅 Sanitaire de l'Alimentation, de l'environnement et du Travail (ANSES), .

Mouche orientale des fruits, un ravageur pour de nombreux fruits et l茅gumes

鈥� Anses (@Anses_fr)

The main issue with the fly is that it does not discriminate. It eats fruit and vegetables alike - including mangoes, tomatoes, courgettes, and avocados. In fact, 500 species are at risk.

鈥淚t is not yet possible to quantify the impact of the introduction of this fly,鈥� said Ms Tayeh. 鈥淒amage could range from 20% to 100% of harvests, depending on the crop. We are not here to create disaster scenarios, but to prevent the fly from becoming established.鈥�

Originally from Southeast Asia, the insect began to spread further in the 2000s. They lay eggs under the fruit or vegetable鈥檚 skin, and the larvae eat the pulp, destroying it from within.

The insect is common in Asia and Africa, but has now arrived in Italy, making its wider spread to France much more likely.

Five of the insects were caught in a trap in the Provence-Alpes-C么te d鈥橝zur region in 2021, after some were also found in Paris and Occitanie in 2019 for the first time.

It is classed as a harmful pest by the European Union, and one of only 20 insects on the "regulated quarantine organisms" list. Also on the list is the infamous Xylella fastidiosa, which has ravaged Italian olive trees and has since spread to the Cote d鈥橝zur in France.

This fruit fly, Bactrocera dorsalis, is a cousin of the Bactrocera oleae, which is already hated by olive growers, as it attacks olives and affects the quality of harvests.

Recommendations to avoid the spread

ANSES is advising individuals to avoid transporting fruit and vegetables when travelling.

The agency has also issued several recommendations to prevent the fly鈥檚 spread, both for companies and individuals.

These include:

• A Plan national d'intervention sanitaire d'urgence (national emergency health response plan), including ensuring existing rules on importing fruit and vegetables are followed
• Stepping up vigilance for people entering the country, especially with respect to imported goods and farming areas around the Mediterranean
• Using measures to reduce the pest, including traps and insecticides
• All professionals who work in contact with imported fruit and vegetables (transport, logistics, shops, etc.) must be extra vigilant to prevent this species from becoming established in France

Large-scale producers are advised to:

• Destroy old produce by burning or grinding it
• Keep produce in a plastic bag for 15 days before composting, or avoid composting altogether
• Avoid letting produce become over-ripe before harvesting
• Use farming techniques that prevent produce falling to the ground
• Cover plants with insect-proof nets
• Close rubbish bins and bags with produce inside and empty bins frequently
• Install insect traps at points where produce is loaded or unloaded

People who spot Bactrocera dorsalis are asked to .

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