Thirty-two spotted katydid

Systematic position: Ephippitytha trigintiduoguttata is an insect belonging to the order Orthoptera and the family Tettigoniidae (true katydids). The specific epithet refers to the pattern of dark spots commonly observed on its tegmina, which are a distinctive identification feature of this species within the group.

Affected crops: This katydid acts as a polyphagous herbivore with a preference for woody vegetation. It primarily feeds on the foliage of fruit trees, ornamental shrubs, and forest canopy trees. In scenarios where populations surge, they may spill over into horticultural crops, causing localized damage to stems and leaves.

Biology and life cycle: The insect follows a hemimetabolous life cycle, characterized by incomplete metamorphosis. Eggs are typically deposited into plant tissues or the soil, serving as the overwintering stage. Upon hatching, nymphs transition through several developmental stages, feeding extensively before reaching the adult phase to reproduce and continue the cycle.

Nature of damage and harmfulness: Possessing robust, chewing mouthparts, the insect inflicts significant damage by consuming leaf tissue. Typical symptoms include irregular notches along the leaf margins or complete skeletonization of the foliage. Heavy infestations can lead to severe defoliation, which stunts plant growth and renders the plant more susceptible to environmental stress.

Control measures: Management of this pest involves an integrated approach to maintain crop health:

• Regular scouting of plants to detect early-stage nymphal activity.
• Application of selective insecticides if threshold levels are exceeded.
• Cultural practices such as clearing debris to eliminate potential egg-laying sites.
• Conservation of natural predators, including insectivorous birds and parasitic wasps.