Pictures :

Description

Globe shaped, 4-6 mm long , 4 mm wide, mahogany- brown , shiny, lacking a median carena, with marked marginal rough patches.

Biology and Damage

E.corni is polyphagous and also attacks many other fruit trees in addition to hazelnut.Adults emerge in April and migrate to young branches, shoots and yound leaves. The female lays her eggs during several days from late May to early July. She then dies, her scale protecting the eggs during the whole embriyonic development period. Males become adults when female nymphs have complated the 2 nd moult. Hatchings begin in mid-June, the 1 st nymphal moult occuring in mid-August. Young nymphs move rapidly on the surface of plants and may be transported by the wind over long distances.They occur on the underside of leaves, especially along the veins. Female produce 1500-2000 eggs. Non-fertilized females only produce females.Nymphs overwinter on roots, branches and trunks.

Blossom on affected plants is sparce, fruits remain small, fruit trees are often covered with considerable quantities of sooty moulds.

Common Names

DE: Gemeine Napfschildlaus, Zwetschgen- Napfschildlaus ES: Cochinilla de la vid , FR: Lecanium du cornouiller et de la vigne, IT: Cocciniglia del corniolo, BG: European fruit scale, Brown scale,Peach scale, TR: Kahverengi koþnil