Altica carinata

Systematic position: Altica carinata is a member of the order Coleoptera and the family Chrysomelidae. Commonly known as a type of flea beetle, these insects are characterized by their enlarged hind femora, which allow them to jump rapidly when disturbed, a typical defensive behavior for the subfamily Alticinae.

Host plants: This pest primarily targets members of the family Onagraceae. It is most commonly associated with Chamaenerion angustifolium (fireweed). While it specializes on these plants, it can occasionally be found on related wild or garden species within the evening primrose family in specific habitats.

Biology and life cycle: Adult beetles overwinter in the soil or under leaf litter. In the spring, they emerge to feed on host foliage. Females deposit eggs on the leaves or stems. The larvae emerge and feed externally on the leaves. After completing several larval instars, they descend into the soil to pupate, eventually emerging as the next generation of adults.

Damage and economic impact: Both adults and larvae are responsible for significant foliar damage. Adults create small, shot-like holes in the leaves (shotholing), while larvae skeletonize the leaf tissue. Severe infestations can lead to substantial leaf loss, reduction in the plant's photosynthetic capacity, and reduced vigor or early senescence.

Control measures: Management of Altica carinata involves a combination of strategies:

• Sanitation by removing alternative weed hosts within the Onagraceae family.
• Cultivation techniques, such as tilling, to disrupt pupal stages in the soil.
• Application of appropriate insecticides targeting adult populations during peak feeding periods.
• Use of biological control agents or insecticidal soaps in organic or home garden settings.