Jasmine lace bug

The jasmine lace bug, scientifically known as Corythauma ayyari, is a member of the Tingidae family within the order Hemiptera. These tiny insects are highly specialized pests that primarily target various species of jasmine and related ornamental shrubs, causing significant aesthetic and physiological damage to plants in gardens and commercial nurseries.

The pest is predominantly found on the abaxial (lower) surface of the leaves, where it uses its piercing-sucking mouthparts to feed on plant cell contents. This localized feeding habit often keeps the insects hidden from casual observation, allowing the population to reach high densities before the owner notices the damage.

Regarding its biology, Corythauma ayyari follows a typical hemimetabolous life cycle, consisting of egg, nymph, and adult stages. The insect thrives in warm climates, where it can complete multiple generations throughout the growing season. Females lay eggs on the leaves, which then hatch into nymphs that undergo several molts before reaching maturity.

The characteristic injury caused by this lace bug manifests as stippling or mottled chlorosis on the upper leaf surface. As feeding continues, these spots coalesce, leading to severe leaf yellowing, browning, and premature leaf drop. The presence of dark, crust-like excrement on the underside of the leaves is a definitive diagnostic feature of an active infestation.

Implementing a successful control program requires a multi-faceted approach:

• Regular scouting for early signs of infestation on the underside of foliage.
• Application of horticultural oils or insecticidal soaps specifically targeting nymphs.
• Usage of systemic insecticides when infestations reach critical economic thresholds.
• Proper irrigation and fertilization to help the plant recover from the stress of pest damage.