Cotton lace bug

Systematic position. The cotton lace bug (Corythaica costata) belongs to the order Hemiptera and the family Tingidae. These insects are easily recognized by their highly specialized, lace-like thoracic and wing structures, which provide excellent camouflage on host plants.

Host plants and damage. The primary host is the cotton plant (Gossypium spp.), but the species is also known to affect various Malvaceae and Solanaceae family members. These pests use their piercing-sucking mouthparts to extract plant sap, causing significant physiological stress to the host.

Biology and life cycle. The life cycle comprises an egg stage, five nymphal instars, and the adult stage. Eggs are typically laid in clusters on the underside of leaves. Under favorable temperature and humidity conditions, the insect can complete multiple generations in a single season, leading to rapid population explosions.

Damage symptoms. Feeding damage manifests as chlorotic stippling on the leaves, which eventually turn yellow and necrotic. Heavy infestations cause premature leaf drop, stunted plant growth, and a significant reduction in fiber quality and yield. The loss of photosynthetic surface area is the main driver of economic damage.

Control measures. Effective management strategies include the following steps:

• Regular field scouting to detect early infestations.
• Removal of alternative host weeds from the field borders.
• Application of selective insecticides when nymphal populations reach economic thresholds.
• Encouraging natural predators such as lady beetles, lacewings, and predatory mites that feed on both eggs and nymphs.