Erythrina psyllid

Systematic position: The Erythrina psyllid (Psylla erythrinae) belongs to the order Hemiptera and the family Psyllidae. This tiny sap-sucking insect is a specialized pest that targets species of the genus Erythrina, commonly known as coral trees, causing significant distress to these ornamental plants.

Host plants: The primary hosts are members of the Erythrina genus. The infestation typically occurs in nurseries, botanical gardens, and landscapes where these tropical trees are grown. The pest is particularly attracted to new vegetative growth, which is vital for the development of its offspring.

Biology and lifecycle: The lifecycle of Psylla erythrinae is closely synchronized with the flush of new foliage on its host. Females lay eggs on developing leaves or buds. Upon hatching, the nymphs begin feeding on plant tissues, triggering the formation of galls. The insect completes its development within these protected structures, often producing multiple generations during the growing season.

Nature of damage: The hallmark of an infestation is the development of numerous galls on the leaves and petioles. These swellings are the plant's physiological response to the feeding activities of the nymphs. Heavy infestations lead to severe leaf distortion, chlorosis, and premature leaf drop, which can significantly stunt the growth and aesthetic quality of the coral tree.

Control measures: Management of the Erythrina psyllid requires careful observation and targeted interventions. Cultural control, such as pruning and destroying heavily infested plant parts, is the first step to reduce the population density. For severe cases, systemic insecticides applied during the early stages of infestation provide the best results by reaching the larvae sheltered inside the galls.

• Regular monitoring of new leaf flushes.
• Sanitation by pruning and burning infested plant material.
• Application of systemic insecticides for severe outbreaks.
• Biological control through encouraging native predators where applicable.