Chrysanthemum tortrix

The chrysanthemum tortrix (Cnephasia chrysantheana) is a moth species belonging to the order Lepidoptera and the family Tortricidae. It is recognized as a significant pest, particularly known for its impact on ornamental flower crops and various herbaceous plants across its distribution range.

This moth species is a polyphagous pest, meaning it attacks a variety of host plants. The primary targets include Chrysanthemum species, Asteraceae family members, and various weeds. By feeding on both foliage and floral buds, the larvae can cause significant aesthetic and economic damage to professional nurseries and home gardens.

The life cycle typically consists of a single generation per year. The insect usually overwinters at the larval stage within a protective cocoon in bark crevices or plant debris. As temperatures rise in spring, the larvae emerge to feed on developing leaves, often spinning them together with silk to create a shelter.

Damage caused by this pest is characterized by the presence of rolled or webbed leaves. Larvae feed internally within these leaf clusters, skeletonizing the leaves and boring into buds, which results in stunted or deformed flowers. In cases of high infestation, the plant's photosynthetic capacity is severely reduced.

• Monitor adult flight using pheromone traps.
• Manually remove and destroy infested leaf clusters.
• Apply targeted insecticides during the early larval stage.
• Implement proper cultural practices to minimize overwintering sites.

Controlling the chrysanthemum tortrix requires an integrated approach. Early detection is crucial, as the larvae are protected inside the webbed leaves. Combining regular visual monitoring with appropriate insecticide treatments—specifically those targeting young larvae before they spin their protective shelters—provides the best results for crop protection.