Leaf crumpler moth

Systematic position: The leaf crumpler moth (Acrobasis indigenella) is classified within the order Lepidoptera and the family Pyralidae. This species is a recognized pest of rosaceous fruit trees, characterized by its unique habit of building protective shelters from leaves and frass.

Host plants: The pest primarily targets fruit trees such as apples, pears, plums, cherries, peaches, and quinces. It also resides on wild shrubs and trees like hawthorn and mountain ash, which can serve as reservoirs for infestations in agricultural landscapes.

Biology and life cycle: The species overwinters as young larvae in small, tube-like cases made of silk and excrement attached to twigs. As trees bud in spring, larvae become active, feeding on the emerging buds and young foliage. After completing their larval development and pupation, the adult moths emerge to mate and lay eggs for the next generation.

Damage and economic importance: Larvae damage trees by consuming buds and webbing leaves together into twisted, crumpled structures. This feeding behavior significantly reduces the photosynthetic area of the tree and can lead to severe crop loss. Repeated damage weakens the trees, making them more susceptible to diseases and environmental stress.

Protection measures: Management involves a combination of mechanical and chemical approaches. During winter and early spring, manual removal of the overwintering cases is highly effective. In case of significant infestations, the use of insecticides targeting the early larval stages is recommended to prevent extensive damage to the tree canopy.

• Manual removal of larval cases.
• Monitoring using pheromone traps.
• Application of selective biological insecticides.
• Pruning and destroying infested plant material.