Plum fruit moth (leafroller)

The plum leafroller (Hedya pruniana) is a moth species belonging to the order Lepidoptera and the family Tortricidae. It is a well-known pest in temperate climates, frequently found in both commercial orchards and home gardens, where it impacts the health and productivity of fruit trees.

The primary host plants include stone fruit trees such as plums, cherries, apricots, and sloe. While it shows a strong preference for Prunus species, it can occasionally be found on apple trees, making it a significant pest across various types of fruit production.

The biological cycle involves overwintering as second-instar larvae in protective cocoons hidden within bark crevices. As temperatures rise in spring, the larvae emerge to feed on developing buds. During the summer months, adult moths emerge, mate, and lay eggs, leading to subsequent generations that continue the damage cycle.

Damage is characterized by larvae spinning silk to roll or fold leaves together, creating a protected feeding site. Inside these structures, they consume leaf tissue, buds, and sometimes blossoms. This behavior severely stunts leaf development and, in severe infestations, can significantly reduce overall fruit yield.

Integrated Pest Management (IPM) is the most effective approach for controlling this pest. Strategies include monitoring adult activity with pheromone traps, removing overwintering sites by cleaning tree trunks, and applying targeted insecticides during the larval growth stages. Chemical control should be timed carefully to match the larval activity window.