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Apple Ermine

Apple Ermine

Yponomeuta malinellus

A species of Yponomeuta

Yponomeuta malinellus, the apple ermine, is a moth of the family Yponomeutidae. It is native to Europe and Asia, and it has spread to North America. The wingspan is 16–20 millimetres (⁄8–⁄4 in). The fore ings are white and have 12 to 16 black dots, which are arranged in three irregular lines. The moth flies from June to October. The larvae feed on apple species. It can defoliate apple trees and negatively impact fruit production for several years following an outbreak.

General Info About Apple Ermine
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Attributes of Apple Ermine
Colors
Brown
Black
White
Habitat
Apple orchard
Adult Food Sources
Floral nectar, tree sap, other sugary secretions from plants, juice from rotting fruit, honeydew
Larva Food Source
Apple tree leaves, hawthorn, pear tree leaves, quince, cotoneaster
Biting/stinging
Not reported
Allergy-causing
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
Not reported
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Siphoning mouthparts
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Species Status of Apple Ermine
Widespread in England
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Distribution Area of Apple Ermine
Europe
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Life Cycle of Apple Ermine
Egg The egg of the apple Ermine is often laid in clusters. It's small, oval, and initially pale, darkening as it matures. The egg stage is the beginning of the life cycle.
Larva Upon hatching, the caterpillar of apple Ermine emerges, primarily focused on feeding. The larva is long, worm-like, with a soft body, and undergoes several molts, growing larger with each.
Pupal After the final molt, the apple Ermine enters the pupal stage, enclosing itself in a cocoon. The pupa is inactive, with major transformations occurring internally as it prepares for adulthood.
Adult Emerging from the pupa, the adult apple Ermine’s development is marked by the presence of wings and functional reproductive organs. The body is fully formed and hardened, and the adult is mobile, focusing on reproduction.
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Predators of Apple Ermine Larvae
Birds, rodents, insectivorous mammals, parasitoid wasps, predatory insects
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Scientific Classification of Apple Ermine
Tips for Finding Apple Ermine
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Youth Habitat of Apple Ermine
Forests and Woodlands, Agricultural and Cultivated Areas
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Adult Habitat of Apple Ermine
Forests and Woodlands, Agricultural and Cultivated Areas, Urban and Suburban Areas
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How Can You Attract Apple Ermine
Since apple Ermine primarily feed on fruit trees like apple trees, traps baited with pheromones or kairomones resembling host plant volatiles could be used.
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Habitat Preferences of Apple Ermine Through Different Life Stages
Apple Ermine eggs are typically found on the underside of leaves or in bark crevices of their host plants, usually fruit trees like apple. Caterpillars establish communal webs on the host, facilitating their search on tree branches. Pupation often occurs within these silken tents, or close by in sheltered, undisturbed areas such as cracks or crevices. Adults are nocturnal and can be attracted to light, making them more likely found near light sources after dusk. For a successful search, inspect host plant leaves and bark for eggs, communal webs on branches for caterpillars, crevices for pupae, and use light traps at night for adults.
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How and Where Can You Find Apple Ermine at Different Life Stages
Egg Apple Ermine eggs are usually laid in clusters on the host plants, mainly on the underside of leaves. To find them, carefully inspect the surface of leaves on known host plants during laying seasons.
Larva Apple Ermine larvae are communal and create silken webs on the host trees. Look for their distinctive webs on trees, as they will typically be inside or nearby.
Pupal Apple Ermine pupae can be found in the debris or bark of the host trees. Search crevices or at the base of trees for silk cocoons or pupal casings.
Adult To find adult apple Ermine, set up light traps at night or check flowers, as adults are attracted to light and will often feed on nectar.
Are Apple Ermine harmful?
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Harmful Effects of Apple Ermine
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Agricultural Pests

Larvae of apple Ermine can cause mild to severe damage by chewing on leaves and stems of apple trees. Minor infestations only result in cosmetic damage, but severe cases can lead to defoliation, weakened trees, and lower fruit yields, impacting agricultural income and increasing the need for pest management.

More Effects of Apple Ermine

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