Lappet moth (Malacosoma brisotti)

The lappet moth (Malacosoma brisotti) is a member of the Lasiocampidae family within the order Lepidoptera. This species is recognized as a specialized pest that exhibits significant activity in specific climatic regions, feeding primarily on the foliage of various woody shrubs and trees.

The pest predominantly targets pome and stone fruit crops, including apple, pear, plum, and apricot. Occasionally, it is found on wild Rosaceae species, which allows the insect to establish persistent breeding populations in hedgerows and adjacent orchard environments.

The biological life cycle of this insect includes the egg, larva (caterpillar), pupa, and adult stages. They typically overwinter as formed larvae protected within egg mass coatings or dense silken nests. As spring temperatures rise, the larvae begin active feeding through several instars, culminating in pupation within sturdy cocoons attached to tree branches.

The damage is characterized by skeletonization or complete defoliation of the leaves by the caterpillars. In instances of mass outbreaks, the pest can quickly strip the tree canopy bare, leading to a critical decline in photosynthetic capacity, weakened plant immunity, and significant yield losses in both the current and subsequent growing seasons.

Protection measures comprise a combination of cultural and chemical strategies:

• Mechanical removal and destruction of egg masses and silken nests during the dormant winter and early spring seasons.
• Encouraging the presence of natural enemies, including beneficial entomophagous insects and birds.
• Application of biological insecticides (based on Bacillus thuringiensis) during the early larval developmental stages.
• Deployment of systemic insecticides when pest population levels exceed the established economic threshold.