Chalkhill blue

The Chalkhill blue (Lysandra coridon) belongs to the Lycaenidae family within the Lepidoptera order. While primarily recognized as a butterfly of calcareous grasslands, its larval stage can feed on various legume species, occasionally impacting agricultural forage crops.

The life cycle of this species includes a single annual brood. Females deposit eggs on host plants, and the larvae emerge to feed on foliage throughout the spring and early summer. The development speed is highly dependent on temperature, which directly influences the timing of peak damage.

The caterpillars primarily consume the leaves of leguminous plants, such as various species of clover and bird's-foot trefoil. By skeletonizing the leaves, they significantly reduce the photosynthetic capacity of the plant, which is particularly detrimental during the early stages of crop development.

The economic impact involves decreased biomass production in pastures and hayfields. If populations reach high densities, the loss in forage quality and quantity can necessitate integrated pest management strategies to protect the economic viability of the forage production.

• Regular field scouting to detect early larval activity.
• Maintenance of healthy soil fertility to increase plant tolerance to herbivory.
• Implementation of biological control agents to manage caterpillar populations.
• Targeted application of insecticides only when necessary to preserve beneficial insects.