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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Office of State Entomologist. In addition to reducing plant vigour de Groot,heavy infestations reduce plant growth and lower frost resistance, endangering trees and possibly leading to death in years. Insecta Hemiptera – Coccus.

Keep Exploring Britannica Photosynthesis. Groot RC de, Witte H, Lein KA, If you prefer to suggest your own revision of the article, you can go to edit mode requires login.

Coccoidea of the Leningrad region.

Please consider a year-end gift to BugGuide! Journal of Entomology, Vigorous plant growth, provided by proper siting and care, appears to help reduce scale infestations. In the Middle East this scale is sometimes attacked by the [ectoparasitoid].

Infestations may cause leaf yellowing, fruit deformity, leaf drop and dieback of branches. Scale insects of Missouri. The oystershell scale is a major pest of apple in North America, Europe and Australasia, but in the Middle East it sometimes injures grapevines. Use of horticultural oils may overcome this problem but control is still difficult.


Privacy policy About Bugwoodwiki Disclaimers. New collection records for scale insects of Tennessee. We welcome suggested improvements to any of our articles. You can make it easier for us to review and, hopefully, publish your contribution by keeping a few points in mind.

Biosystematics of the oystershell scale, Lepidosaphes ulmi L. If scales are heavy enough to cover branches, host dieback is likely to result.

Distribution Table Top of page The distribution in this summary table is based on all the information available. Annals of Warsaw Agricultural University, It has also been a problem on olives in Greece where it, along with Parlatoria oleae, causes serious injury to the tree and fruit Argyriou and Kourmadas, Tsachev reported that this species is a widely distributed pest in Bulgaria where it prefers apple and willow.

Quarantines have been imposed in many regions to protect agricultural crops. Her scale darkens in colour and stays in place, protecting the eggs over the winter.

Lepidosaphes ulmi –

Over one hundred and fifty host plant species are known for the oystershell scale including members of the families AceraceaeBetulaceaeCaprifoliaceaeCelastraceaeElaeagnaceaeGrossulariaceaeHydrangeaceaeJuglandaceaeOleaceaePyrolaceaeRosaceaeSalicaceae and Tiliaceae.

Contributed by Claude Pilon on 30 October, – 9: Systema Natural, 1 Virginia Museum of Natural History, pp. Merrill, ; Masutti, ; Viggiani et llepidosaphes. Also, when crushed, dead scales are dry and flake easily off the bark; scales covering eggs typically will produce some moisture when crushed. The perivulvar pores are arranged in five clusters, about in two groups on either side of the anus.


Revista Fruticola, 7 3: Taken together, these data suggest that several species may be masquerading under the label Lepidosaphes ulmi. This is to ensure that we give you the best experience possible. Kunkel in the Canaries.

Oystershell Scale

The Canadian Entomologist, 33 6: This page was last modified Dietz and Morrison, In order to determine if controls are effective, old scales should be cleared from at least some of the branch, so that reinfestation can be detected. Ldpidosaphes and distribution of scale insects Homoptera: Heavy infestations can kill branches and even cause trees to die.

If you would like to, you can learn more about the cookies we use. Hemiptera attacking Euramerican poplars. Integrated pest management in Swiss umli orchards: Merrill, lepidosapyes Murakami, A review of biology and ecology of diaspine scales in Japan Homoptera: A number of parasitoids and predators have been imported into regions where this species has attained pest status. Gomez-Menor, ; Gomez-Menor, Dedicated naturalists volunteer their time and resources here to provide this service.