Taken together, these data suggest that several species may be masquerading under the label Lepidosaphes ulmi. Economic importance: The. Lepidosaphes ulmi (L.) Hanson, T., and E. B. Walker. [n.d.] Field guide to common insect pests of urban trees in the Northeast. Waterbury, VT: Department of. Lepidosaphes ulmi also known as oystershell scale are Scale Insects that is a pest on woody plants. The small insects attach themselves to bark and cause.

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Due to constantly changing labels, lepidosaphees and regulations, the Extension Services can assume no liability for the suggested use of chemicals contained herein.

Ecological-physiological study on the arrests of embryonic development in the scale insect Lepidosaphes ulmi L.

Merrill, ; Geoffrion, ; Gharib, ; Gharib and Benassy, Investigations on the biology of some species of Coccoidea Homoptera lepidosalhes to apple trees in the Province of Ankara. California Department of Food and Agriculture. If you would like to, you can learn more about the cookies we use.

Revista Frut cola, 5 1: Coccinea from import interceptions and greenhouses in the Netherlands. Annales de l’Institut Phytopathologique Benaki, 13 1: Unfortunately, our editorial approach may not be able to accommodate all contributions.


Bugguide is hosted by: Argyriou and Kourmados proposed a spring treatment to protect the fruit, and a summer application in August to control the overwintering generation of L. Lepidosaphes ulmi also known as apple mussel scale or oystershell scale is a scale insect that is a pest of trees and woody plants. Phenology, lfpidosaphes diapause and importance of natural enemies of Lepidosaphes ulmi L.

Contributed by Claude Pilon on 30 October, – 9: Biosystematics of the oystershell scale, Lepidosaphes ulmi L. Branches may become encrusted and exhibit die-back. Diapididae of the Conterminous United States.

The insects of Euroamerican poplars and their original food-plants. The oystershell scale is found on lilacs, beeches, maples, willows, and many hlmi.

Lepidosaphes ulmi – Bugwoodwiki

Coccoidea infestations in European orchards No. The pest infests mainly trunks, branches and fruit, rarely the leaves. Parent, ; Parent, Known enemies include lady beetles, parasitic wasps, and mites.

Cosmopolitan, occurring in all apple-growing regions. If you need expert professional advice, contact your local extension office.

Oystershell scale

Her scale darkens in colour and stays in place, protecting the eggs over the winter. When several references are cited, they may give conflicting information on the status. Rastitelna Zashchita, 26 7: Pests of Rosa damascena Mill. Coccoidea on olive trees in Croatia with special regard on Black araucaria scale – Lindingaspis rossi Maskell Chemical lepisosaphes for winter control of eggs of the apple mussel scale Lepidosaphes ulmi L.

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Forest Pests: Insects, Diseases & Other Damage Agents

Infestations may cause leaf yellowing, fruit deformity, ylmi drop and dieback of branches. Over one hundred and fifty host plant species are known for the oystershell scale including members of the families AceraceaeBetulaceaeCaprifoliaceaeCelastraceaeElaeagnaceaeGrossulariaceaeHydrangeaceaeJuglandaceaeOleaceaeLspidosaphesRosaceaeSalicaceae and Tiliaceae. They may be univoltinebivoltine and even polyvoltineand may, or may not, infest the same host plant, differ in fecundity and cold-hardiness, as well as possess, or lack, an embryonic diapause.

Diaspididae on olive trees in Greece.

The Canadian Entomologist, 1: Coccids as pests of park plants. Distribution des formes hivernantes des ravageurs du pommier dans la region de Gembloux novembre et decembre Not all colonies produce males and bisexual and parthenogenetic populations are known.

The male is winged, white-yellow in color.

Distribution and density of scale insects Homoptera: Views Read Edit View history.