triozy

Triozy is the plural form of trioza, a common name used for certain sap-sucking insects in the family Triozidae, within the superfamily Psylloidea of the order Hemiptera.

These insects are small, typically a few millimeters long. Adults are usually winged; nymphs develop on host plants. They feed by inserting their piercing-sucking mouthparts into phloem tissue to extract sap and may produce waxy secretions. Some species induce galling, leaf curl, or distortion of shoots on their host plants.

Host range tends to be narrow, with many triozas feeding on a limited set of plant species or genera. The life cycle includes an egg stage, multiple nymphal instars, and winged or wingless adults, with generation numbers varying by species and climate. Dispersal is often aided by winged adults.

Ecologically, triozas inhabit a variety of woody plants, including fruit trees and ornamentals. Infestations can reduce vigor, affect yield, and create honeydew that fosters sooty mold growth, diminishing photosynthesis and aesthetics. Some species are vectors of plant pathogens, notably Liberibacter bacteria in citrus.

An example is Trioza erytreae, the African citrus psyllid, which transmits Liberibacter africanus, the causal agent of citrus greening disease in Africa and parts of Europe.

Management focuses on early detection, monitoring with traps or scouting, pruning of infested growth, and promoting natural enemies. Chemical control is used selectively, with attention to resistance management and environmental impact. Quarantine and sanitation help prevent spread between regions.