Broom moth

The Broom moth (Anarsia spartiella) is a species of moth belonging to the family Gelechiidae. It is recognized as a specific phytophagous insect that primarily targets leguminous plants, particularly those within the genus Cytisus, across its natural distribution range.

The pest causes significant damage to various species of broom and related shrubs. The larvae (caterpillars) feed on young leaves, terminal buds, and flowers. This herbivory can lead to stunted shoot growth and a reduction in the overall ornamental value and health of the infested host plants.

Regarding its biology, the insect undergoes a complete metamorphosis. The larvae are known for their habit of spinning leaves together with silk, creating protective shelters while they feed. This behavior makes them less vulnerable to environmental fluctuations and some natural predators, complicating manual management efforts.

The severity of the damage depends on the larval population density. Typical signs of infestation include skeletonized foliage, webbed leaves, and twisted or deformed new growth. High infestation levels can lead to premature leaf drop and increased physiological stress for the plant, making it more susceptible to secondary pests.

Management strategies focus on early detection through visual inspection of plant tips. Effective control involves pruning and disposing of infested branches to interrupt the life cycle. In severe cases, targeted applications of systemic insecticides or biological agents may be employed to manage population peaks while minimizing impact on non-target species.