Spanioneura buxi

(L.)

boxwood psyllid

Spanioneura buxi, commonly known as the boxwood , is a sap-feeding insect in the Psyllidae that infests boxwood (Buxus ). The species produces distinctive cupped or curled terminal leaves on plants, caused by nymphal feeding and wax secretion. It has a single per year in temperate regions. The insect is considered a minor pest that causes primarily cosmetic damage, with most boxwood plants recovering without permanent injury.

Pronunciation

How to pronounce Spanioneura buxi: /ˌspænioʊˈnʊərə ˈbʌksi/

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Identification

Confirmed by the presence of severely cupped or curled terminal leaves on boxwood, with white wax filaments visible inside the curled foliage. Nymphs are found within these cupped leaves. jump when disturbed and may be present in large numbers when foliage is agitated. Distinguished from boxwood leafminer (a fly that causes blister-like leaf mines) by the terminal leaf cupping rather than internal leaf mining.

Habitat

Occurs in managed landscapes, gardens, and nurseries where boxwood (Buxus ) is cultivated. Associated with urban, suburban, and rural ornamental plantings.

Distribution

Widespread across North America wherever boxwood is planted; GBIF records indicate presence across the United States and southern Canada, as well as parts of Europe including France and Denmark.

Seasonality

Nymphs hatch from in spring and develop over several weeks. emerge in late spring, with activity continuing from late May through June. A single occurs annually. Eggs are laid in terminal buds in summer and remain until the following spring.

Diet

Feeds on sap from vascular tissue of boxwood (Buxus ). Nymphs and both feed by inserting into plant tissue and withdrawing nutrient-laden sap.

Host Associations

Buxus - obligate Boxwood and cultivars are the sole .

Life Cycle

hatch in spring. Nymphs feed on developing terminal foliage, secreting protective wax and causing leaf cupping. Nymphs complete development and to over several weeks. Adults feed for several weeks before laying eggs in terminal buds. One per year.

Behavior

Nymphs remain clustered within cupped terminal leaves, feeding and producing wax filaments. are active jumpers; when foliage is disturbed, they leap and fly in large numbers. Adults have been reported to bite humans, though bites are not considered significant.

Ecological Role

Herbivore that causes localized plant damage. The wax filaments produced by nymphs may provide for other small organisms. Not a .

Human Relevance

Minor pest of ornamental boxwood in landscapes and nurseries. Damage is primarily cosmetic; plants typically outgrow injury without intervention. Chemical control is usually unnecessary. May cause nuisance through jumping when foliage is disturbed.

Similar Taxa

Boxwood leafminer (Monarthropalpus flavus)Both infest boxwood leaves, but leafminer is a fly (Diptera) that causes blister-like internal mines rather than terminal leaf cupping. Leafminer damage appears as raised yellow blisters on leaves, not curled terminal growth.
Box tree moth (Cydalima perspectalis)Both are boxwood pests, but is a caterpillar that causes severe defoliation and can kill plants. damage is limited to terminal cupping and is not lethal.

More Details

Taxonomic Note

The has been classified under multiple , including Psylla and Cacopsylla. GBIF currently lists Spanioneura buxi as a synonym of Psylla buxi, though the name Spanioneura buxi remains in common use in North American literature.

Management

Damage is typically transient and does not require treatment. or soaps may be used if aesthetic damage is unacceptable. Pruning out infested terminals can reduce .