Long-snouted stink bug

Systematic position: The long-snouted stink bug (Poecilocoris longirostris) belongs to the order Hemiptera and the family Scutelleridae (jewel bugs). This insect is known primarily as a specialized pest that affects specific perennial crops, particularly in subtropical agricultural regions.

Affected crops: The primary host plant for this species is tea (*Camellia sinensis*). These bugs are significant pests on tea plantations, where they concentrate on the tender shoots and leaves of the tea bushes. In the absence of primary hosts, they may occasionally be found on other related shrub species.

Biology and life cycle: The life cycle consists of the egg stage, five nymphal instars, and the adult stage. The insects typically overwinter in protected areas, emerging as temperatures rise. Their reproductive strategy involves depositing egg clusters on the underside of leaves, allowing nymphs to begin feeding immediately upon hatching. Environmental factors like humidity and heat significantly influence their population growth rate.

Damage and pest status: As a piercing-sucking pest, the bug uses its elongated proboscis to penetrate plant tissues. During feeding, they inject salivary enzymes that cause local cell death, leading to chlorosis, stunted growth, and necrotic spotting on the foliage. Heavy infestations can severely weaken the plant and reduce the commercial yield and quality of the tea harvest.

Protection measures: Integrated Pest Management (IPM) is essential for managing this pest. Cultural practices include proper pruning and field sanitation to minimize overwintering sites. Chemical control involves the application of selective insecticides during the nymphal stages, which are typically more susceptible than adults. Biological control agents, such as egg parasitoids, also play a vital role in maintaining natural balance in tea-growing areas.