Bactericera

Bactericera is a genus of small sap-sucking insects in the order Hemiptera, commonly known as psyllids or jumping plant lice. Members of this genus feed on the phloem of a wide range of host plants, often causing growth distortions or reduced vigor when populations are high. They are typically found on new growth and are most active in warm, dry conditions when reproduction accelerates.

One notable species is Bactericera cockerelli, the tomato-potato psyllid, a major agricultural pest of solanaceous crops in many regions. In addition to feeding damage, this species vectors Candidatus Liberibacter solanacearum, the bacterium associated with zebra chip disease in potatoes and related symptoms in tomatoes and peppers. Management of B. cockerelli relies on monitoring, exclusion of infested material, and integrated control strategies, including biological control agents and selective insecticides when thresholds are exceeded.

Distribution and ecology: Bactericera species are found in various regions. B. cockerelli is native to western North America but has been introduced and established in other parts of the world, including some areas of Central and South America, New Zealand, and portions of Europe and Africa, mainly through movements of plant material and produce.

Life cycle: Like other psyllids, Bactericera species undergo egg, nymphal, and adult stages. Eggs are laid on new growth; nymphs feed on plant sap and develop through several instars before maturing into winged or wingless adults depending on species and conditions. Generations per year vary with climate, with more generations in warm regions.

Taxonomy and notes: Bactericera belongs to the psyllids (Psylloidea) within Hemiptera. Taxonomic placement can vary among sources, but the genus is consistently recognized as a group of plant-feeding psyllids with agricultural relevance.