Tea psyllid

Systematic position. Pauropsylla chonchaiensis belongs to the order Hemiptera, family Psyllidae. This insect species has evolved to specifically occupy the niche of sap-sucking pests on woody perennial plants, showing a strong preference for members of the Theaceae family, specifically tea cultivars.

Host plants and damage. The primary host is the tea plant (Camellia sinensis). The pest typically colonizes the flushing (tender young shoots and leaves). Their feeding activities induce gall formation or significant leaf curling, which physically obstructs the normal physiological development of the leaf, leading to reduced chlorophyll production and stunted shoot growth.

Biology and life cycle. The life cycle of Pauropsylla chonchaiensis is closely synchronized with the tea plant's growth flushes. Eggs are inserted into the soft tissues of the terminal buds. Upon hatching, nymphs begin immediate feeding. Depending on the environmental temperature and humidity, the pest can complete several overlapping generations within a single growing season.

Economic impact. The infestation leads to severe economic losses by directly reducing the yield of tender leaves suitable for harvesting. Moreover, the damage inflicted by the psyllid affects the quality of the raw material, as it alters the biochemical composition of the tea leaf, which is vital for the final sensory profile of the tea beverage.

Management strategies. Effective management requires an integrated approach:

• Field monitoring using yellow sticky traps to track adult migration.
• Cultural practices such as pruning affected shoots to disrupt the life cycle.
• Encouraging natural biological control agents, including predatory bugs and parasitic wasps.
• Targeted application of systemic insecticides strictly when populations exceed the economic threshold, ensuring compliance with food safety regulations.