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Grapevine Beetle (Pelidnota punctata)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Grapevine Beetle



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A reasonable beetle, the Grapevine Beetle does not devour the grapevines it feeds on, much to the relief of everyone that enjoys viticulture.



Updated: 07/06/2021; Authored By Staff Writer; Content ©www.InsectIdentification.org
A Grapevine Beetle is part of the Scarab beetle family, so it shares a similar body shape to June Beetles and Japanese Beetles. The Grapevine Beetle may be a tan color or a darker shade of brown, with brown or black legs depending on the region. Legs are thick and have some serration and hairs on them. A distinguishing feature for identifying this species lies on its elytra. Each wing covering (elytron) has three black dots near the outer edge. The thorax also has a black dot on each side, keeping in line with those on the elytra. The area where the thorax and the top center of the abdomen meet has a black or brown semicircle. The black eyes are on either side of the head, which may be tan or a darker shade of brown.

Despite their appetite for grapevine foliage, Grapevine Beetles do not have a serious impact on the plant's health or growth. Eggs are laid on rotting logs or tree stumps of deciduous trees. Larvae feed on the roots and other parts of these trees until they move to the soil to pupate. After one to two years, adults emerge in the spring and are active all spring and summer. Look for them on flowers and leaves of grapevines, or in hardwood forests on fallen trees and logs where they go to reproduce.




General Characteristics
Capability, Shape, Texture/Pattern, Benefits, Dangers
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Taxonomic Hierarchy
Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Coleoptera
        Family: Scarabaeidae
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          Genus: Pelidnota
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            Species: punctata
Identifying Information
Size, Colors, Features
Scientific Name: Pelidnota punctata
Other Name(s): Spotted June Beetle
Category: Beetle
Size (Adult; Length): 17mm to 27mm (0.66" to 1.06")
Colorwheel Graphic Colors: brown, black
Descriptors: six spot, eight dots, clingy, flying, junebug
Relative Size Comparison
Typical Size Between 17mm (0.7in) and 27mm (1.1in)
Lo: 17mm
Md: 22mm
Hi: 27mm
Territorial Map*
U.S., Canada, and Mexico
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Alaska  
Hawaii  
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Grapevine Beetle may be found (but is not limited to). This sort of data is useful when attempting to see concentrations of particular species across the continent as well as revealing possible migratory patterns over a species' given lifespan. Some insects are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America. States/Territories shown above are a general indicator of areas inhabited by the Grapevine Beetle. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.

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