Six-spot burnet

The Six-spot burnet (Zygaena filipendulae) is a moth belonging to the order Lepidoptera and the family Zygaenidae. These insects are easily recognized by their metallic blue-black wings with distinct red spots. As a defense mechanism, they produce hydrogen cyanide, making them distasteful to predators.

While primarily feeding on wild plants, the larvae of this species can pose a minor risk to agricultural areas, specifically those containing forage legumes like clover (Trifolium) and bird's-foot trefoil (Lotus corniculatus). In instances of high density, they can reduce the biomass of pasture and hay fields.

The life cycle of the Six-spot burnet is univoltine, meaning there is one generation per year. Larvae hibernate in papery, spindle-shaped cocoons attached to plant stems. In spring, they emerge to feed voraciously on leaves, pupating in early summer. Adults appear throughout the summer months to nectar on various flowers and mate.

Damage is characterized by the consumption of leaf tissue, which can range from skeletonization to complete defoliation of the host plant. While rarely a primary agricultural threat compared to major monoculture pests, their impact on pasture quality can be significant in regions where these forage crops are essential for livestock production.

Management strategies focus on cultural practices to keep population levels low. Effective methods include:

• Regular mowing of field margins and forage crops.
• Proper crop rotation to disrupt the lifecycle of the larvae.
• Maintaining natural habitats to encourage the presence of natural predators, such as parasitic wasps and birds.