Oblique lace bug

Taxonomic classification: The Oblique lace bug (Corythucha obliqua) belongs to the order Hemiptera and the family Tingidae. These insects are easily identifiable by the ornate, reticulated, lace-like appearance of their hemelytra and pronotum, which act as camouflage and protection.

Host plants: This pest primarily targets plants within the Asteraceae family. It is commonly associated with ragweed (Ambrosia) and various ornamental flowering plants. By colonizing these hosts, the insects establish dense feeding populations that can quickly compromise plant health.

Biology and lifecycle: The lifecycle of C. obliqua involves eggs, five nymphal instars, and the adult stage. Eggs are laid in clusters on the undersides of leaves, protected by the leaf surface. They undergo several generations per year, with adults typically overwintering in leaf litter or under the bark of nearby trees to survive cold temperatures.

Nature of damage and pest status: Feeding occurs by piercing plant cells and extracting sap. This damage appears as stippling or chlorotic spots on the upper leaf surface. Over time, affected leaves become discolored, necrotic, and may drop prematurely. Furthermore, the presence of sticky waste droplets and shed larval skins on leaves significantly reduces the aesthetic value of ornamental plants.

Management and control: Managing this pest involves a combination of cultural and chemical strategies. Keeping surroundings free of host weeds is essential to prevent infestations. When population levels become damaging, applying systemic or contact insecticides targeting the underside of the foliage is necessary to ensure the suppression of nymphs and adults.