Eurytoma amygdali

Almond seed wasp

Description

Eurytoma amygdali, commonly known as the almond seed wasp, is a species native to Mediterranean regions and parts of Eastern Europe. This chalcid wasp primarily infests almond (Prunus dulcis) seeds by laying eggs inside the developing nuts. The larvae consume the seed, overwinter inside, and emerge as adults the following season.

Heavy infestations significantly reduce almond yields, affecting both commercial production and natural regeneration of almond trees. Infested nuts become blackened and fail to mature properly, leading to substantial economic losses. Locally the species is especially problematic and damage levels can be very high. Although this pest does not affect the visual appearance of trees, it severely impacts fruit production and seed viability.

Symptom

Infested almonds are blackened, shriveled, and fail to develop normally. Affected seeds contain larval galleries, and exit holes are visible upon adult emergence.

Tree Species: Almond

Part of a plant- attacked: Fruit / Seed

Pest significance: Harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes