Pest outbreak forces destruction of 52 tonnes of avocados across 4 states

About 52 tonnes of avocados were destroyed after officials found avocado seed weevil larvae in fruit prepared for export. State authorities and Mexico’s National Service for Agrifood Health, Safety and Quality, or Senasica, stopped the shipments. The affected states were Michoacán, Jalisco, Colima and Nayarit.

The fruit was not simply rejected or treated. Producers emptied truckloads, while crates were dumped into pits for burning and burial under pest-elimination rules. The larvae were especially important because they develop inside the avocado, where they are difficult to reach and detect.

The shipment stoppage will remain in place while officials determine when exports can resume. Michoacán Environment Minister Alejandro Méndez confirmed the infestation, but local authorities have not yet estimated the economic damage. The response aims to keep the weevil from spreading through trade or orchards.

The avocado seed weevil is a snout beetle in the Curculionidae family. It matters because its larvae develop inside avocados and can remain hidden from ordinary inspection. The insect can also bore into avocado branches and trunks, allowing infestations to spread through orchards.

An adult female pierces the peel with a long mouthpart called a rostrum. She lays one or two eggs close to the seed. The eggs hatch after 12 to 14 days. Each larva then moves through the pulp and feeds on the pit for about two months.

The larva creates a chamber inside the seed and pupates there for two weeks or more. It eventually emerges as an adult. Because much of this life cycle occurs inside the fruit, authorities must use strict detection and removal measures rather than rely only on surface inspection or routine spraying.

Approximately 52 tonnes of avocados were destroyed after the avocado seed weevil was detected in fruit intended for export. The figure covers produce removed during the weekend response, when authorities and farmers acted under pest-elimination protocols.

The affected states were Michoacán, Jalisco, Colima and Nayarit. Video showed producers emptying truckloads and dumping crates into pits. The avocados were then required to be burned and buried, rather than sent to international markets.

The scale of the response reflects the difficulty of finding the pest once it is inside fruit. Authorities halted shipments from the affected areas and are working to determine when exports can resume. Local authorities have not yet provided an estimate of the economic impact, so the article gives no financial total for the losses.

The most surprising feature is that an infested avocado may show no obvious damage on its peel. That makes the pest difficult to identify before fruit is shipped, sold or moved between growing areas. Hidden infestations can therefore trigger strict inspection and destruction measures.

The adult female makes a small opening with her elongated mouthpart, called a rostrum. She places one or two eggs near the seed. Debris and secretions then cover the entry hole. After hatching, the larva travels through the pulp toward the pit and feeds inside it.

The larva and later pupa remain protected within the fruit and seed. Surface appearance therefore does not reliably show what is happening internally. In the reported case, the discovery of larvae in export-bound fruit led authorities to halt shipments, even though the article does not describe visible damage on every avocado.

The avocado seed weevil threatens both trees and trade. The article says it can spread very aggressively within an orchard and devastate crops if it is not addressed. Its presence in export-bound fruit also prompted shipment stoppages, showing how one pest discovery can interrupt market access.

The insect does more than damage fruit. It bores into avocado branches and trunks, while its larvae feed inside the seed. Because the immature stages are hidden, an infestation can be difficult to detect and eliminate quickly. Fruit may also look undamaged from the outside.

Officials are still determining when shipments can resume, and local authorities have not estimated the economic impact. Continued spread could mean more fruit destroyed, greater pressure on orchards, and longer trade interruptions. The article does not provide a forecast, but it links aggressive orchard spread with potential crop devastation.

Authorities are using cultural and biological controls to eliminate the pest. Cultural control means collecting damaged fruit and burying it at least one meter deep or burning it. Biological control uses entomopathogenic fungi, microorganisms that infect, disable and kill insects and other arthropods.

Insecticides are ineffective against larvae and pupae because those stages develop inside the seed, protected from chemical products. The larva tunnels through the pulp, feeds on the pit, and forms a pupation chamber there. Spraying the outside of an avocado cannot reliably reach those hidden stages.

Chemical control can work against adults during their emergence stage. The reported destruction follows the same containment logic: remove infested fruit before adults emerge and spread. Authorities have halted shipments while they assess the infestation and decide when exports can resume.

Countries use these measures because agricultural pests can travel with plants or food and damage crops in new areas. Inspections look for signs of infestation before products move. Quarantines limit movement while officials investigate. Destruction removes contaminated material instead of allowing it to carry the pest onward.

The avocado case shows why this matters. Larvae were found in fruit destined for export, so authorities halted shipments from four Mexican states. Producers then emptied truckloads and disposed of avocados in pits for burning and burial, following pest-elimination protocols.

The weevil is especially difficult to manage because larvae and pupae are hidden inside the seed, while the peel may look undamaged. Removing infested fruit and controlling adult emergence can reduce the chance of spread. The article reports that officials are still determining when shipments can resume, showing that trade can remain restricted during containment.