Solomon's seal sawfly

The Solomon's seal sawfly (Phymatocera aterrima) is a member of the Tenthredinidae family within the order Hymenoptera. It is a specialized pest that primarily targets specific ornamental plants, causing significant cosmetic and physiological damage.

The primary host for this insect is the Solomon's seal (Polygonatum). The larvae are host-specific, meaning they rely entirely on the leaves of this plant genus for their nutritional requirements during their developmental stages.

The life cycle involves adult emergence in the spring, followed by oviposition within the leaf tissue. The larvae go through several instars while feeding on the foliage. Once fully developed, they drop into the soil to pupate and remain there throughout the winter until the next spring cycle.

Damage caused by this sawfly is characterized by skeletonized leaves. In severe infestations, the larvae can consume the entire leaf blade, leaving only the main veins. This defoliation stresses the plant, reducing the vigor of the rhizomes and hindering growth in the following season.

Effective control strategies for managing Phymatocera aterrima include:

• Frequent monitoring of Solomon's seal plants for early signs of infestation.
• Manual removal and destruction of larvae found on the underside of leaves.
• Cultivating the soil around plants in late autumn to disturb pupation sites.
• Applying appropriate insecticidal treatments when young larvae are spotted before they cause widespread damage.