Almond sawfly

The almond sawfly (Eriocampoides amygdalina) is a specialized pest belonging to the order Hymenoptera and the family Tenthredinidae. This insect is primarily recognized for its ability to damage stone fruit trees, causing significant agricultural losses if management practices are neglected.

The host range of this pest focuses on various species within the Prunus genus, including almond, peach, plum, and apricot trees. Larvae of this sawfly feed exclusively on the leaf tissue, significantly impacting the photosynthetic capacity of the trees, which is essential for fruit development and winter hardiness.

The life cycle of Eriocampoides amygdalina involves a complete metamorphosis. Adults emerge in spring to lay eggs directly into the leaf parenchyma. After hatching, the larvae undergo multiple larval stages, feeding voraciously before moving to the soil to pupate. Their ability to overwinter as prepupae in the soil makes them a resilient pest in varied environments.

The symptoms of infestation are distinct, characterized by skeletonized leaves where the green tissue is consumed, leaving only the veins behind. Heavy infestations can lead to premature leaf drop, which puts unnecessary stress on the tree, reduces fruit quality, and hampers the overall growth rate of the canopy during the following season.

Control strategies for the almond sawfly require an integrated approach. Cultural practices, such as autumn soil cultivation, help to disrupt the pupation cycle of the pest. In cases of high population pressure, targeted insecticide applications are necessary. Growers should prioritize the use of selective chemicals to minimize the impact on beneficial predators and pollinators.