Acacia psyllid

Systematic position: The acacia psyllid (lat. Acizzia uncatoides) belongs to the order Hemiptera and the family Psyllidae. This tiny, sap-sucking insect is a specialized pest primarily targeting species within the Mimosoideae subfamily, posing a significant threat to ornamental and forestry plantations.

Host plants: The pest primarily attacks species belonging to the genus Acacia and Albizia. It is a common problem in nurseries and urban landscapes where these trees are planted for aesthetic purposes, often leading to severe infestations in favorable climate conditions.

• Stunting and distortion of new growth
• Leaf curling and yellowing
• Accumulation of sticky honeydew
• Growth of sooty mold fungus
• Reduction in overall tree vigor

Biology and life cycle: The life cycle of Acizzia uncatoides involves egg, nymph, and adult stages. Females lay eggs on tender, succulent foliage. Upon hatching, the nymphs remain concentrated on the soft tissues, extracting fluids that are vital for the plant's growth and development processes.

Damage and severity: Infestation leads to a noticeable reduction in plant quality. The honeydew secreted by the nymphs creates a surface for sooty mold growth, which inhibits photosynthesis. This secondary infection, combined with direct feeding damage, can cause leaf drop and eventual dieback of infested branches.

Control measures: Integrated pest management (IPM) is essential for controlling the acacia psyllid. This includes regular monitoring, pruning of heavily infested branches, and the use of systemic insecticides during the peak activity period of the nymphs. Promoting natural predators can also help suppress populations naturally.