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  • Oystershell Scale | WSU Tree Fruit | Washington State University
    Oystershell scale infests apple and a large number of other fruit, shade and ornamental trees and shrubs The egg is oval and pearly white The newly hatched crawler of either sex is pale yellow in color and has six legs It resembles a San Jose scale crawler
  • Lepidosaphes ulmi - Wikipedia
    Apart from forest trees and ornamentals, the oystershell scale is a pest of apples, pears, plums, peaches, apricots, mulberries and currants It infests trunks and branches and is also found on leaves
  • Oystershell scale - Integrated Pest Management
    The adult female remains immobile under a small brown scale in the shape of an oyster shell attached to the bark of branches The white and oval eggs are laid inside the scale and crawlers emerge in the spring during the petal fall stage of apple
  • Oystershell Scale - NC State Extension Publications
    Female insects secrete comma- or oyster-shaped coverings after attaching themselves to bark or fruit They have been found on more than 100 plant species, including maple, ash, dogwood, and apple
  • Apple-Scale - Pacific Northwest Pest Management Handbooks
    The oystershell scale looks like a miniature oyster While the oystershell scale is principally a pest of woody parts of the plant (although it occasionally attacks fruit), the San Jose scale attacks woody parts and fruit
  • Lepidosaphes ulmi : Insect Mite Guide - UMass Amherst
    The oystershell scale may also be called apple mussel scale, appletree bark louse, or mussel scale by some The cover (test) of the insect certainly looks similar to a mussel
  • Oystershell Scale | Colorado State University Extension
    The oystershell scale, Lepidosaphes ulmi, is the most damaging scale insect present in Colorado It develops on the bark of trunks and limbs of a wide range of commonly grown deciduous trees and shrubs, including aspen, ash, cotoneaster, poplars, willow, and lilac
  • Oystershell Scale | Lepidosaphes ulmi | The Morton Arboretum
    Oystershell scale can feed on a wide range of trees and shrubs It is commonly found on apple (Malus), ash (Fraxinus), dogwood (Cornus), lilac (Syringa), maple (Acer), pear (Pyrus), poplar (Populus) and willow (Salix)
  • Oystershell scale - NRCan
    The oystershell scale occurs generally throughout Canada and the United States It attacks many species of shade trees including apple, white ash, white elm, basswood, and red maple
  • Oystershell Scale
    There are two races of the oystershell scale; the gray race which is found on lilac, ash, willow, poplar, and maple while the brown race is found on apple, dogwood, and poplar





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