Honeysuckle sawfly

Zaraea sericea, commonly known as the honeysuckle sawfly, is an insect pest belonging to the Cimbicidae family within the Hymenoptera order. It is specifically adapted to feed on honeysuckle plants, often causing severe defoliation of these popular garden shrubs.

The biology of this species is characterized by a univoltine lifecycle, meaning it completes one generation per year. Adult sawflies emerge in the spring, coinciding with the active growth phase of the host plants. Females deposit their eggs into the leaf tissue, specifically targeting the margins, where they create small incisions.

The development cycle progresses through the egg, larval, pupal, and adult stages. The insect overwinters in a prepupal stage within a robust cocoon located either in the upper layer of the soil or among organic debris. This survival strategy ensures that the emerging adults can immediately capitalize on the emerging foliage.

Damage caused by larvae is significant. Upon hatching, the larvae feed voraciously on the leaves, starting with small holes and progressing to complete skeletonization, often leaving only the main veins intact. Significant infestations lead to severe stress for the plant, reduced vigor, and a drastic decline in overall plant health.

• Regular monitoring of foliage during the spring months.
• Manual removal and destruction of visible larvae.
• Removal and disposal of leaf litter in late autumn.
• Application of approved insecticides during the larval feeding stage.

Effective management requires a combination of cultural and chemical controls. In smaller garden settings, physical removal is often sufficient. However, in larger infestations, well-timed applications of contact or systemic insecticides during the early larval development phase are necessary to prevent extensive damage to the shrubbery.