Acanalonia conica

Green cone-headed planthopper

Description

Acanalonia conica, known as the green cone-headed planthopper, is a polyphagous species from the family Acanaloniidae. Native to North America, it was first recorded in Europe in 2003 in Italy and has since spread to several countries, including Slovenia, France, Switzerland, Austria, and Türkiye. It feeds on a wide range of host plants, from herbaceous species to shrubs and trees, and can adapt to both cultivated and wild vegetation. Adults and nymphs secrete honeydew, which can lead to the development of sooty mold, reducing the aesthetic value of plants. Nymphs are characterized by their brown, hump-backed appearance and long white waxy filaments, while adults are bright green with conical heads and red eyes. The species produces one generation per year, with eggs laid in bark crevices in summer and autumn. Intense infestations can negatively impact the aesthetic appearance and may contribute to a decline in plant vitality, especially in urban environments where ornamental plants are heavily affected.

Symptom

On infested plants, bark crevices contain eggs, and twigs and stems may show white, waxy secretions. Nymphs obscure themselves with wax and may feed in groups, causing localized discoloration.

Tree Species: Black Locust, Cherry, Oak, Hawthorn, Pear, Apple Tree, Maple, Raspberry, Rose, Plum, Poplar

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes