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Acorn Weevil Larva - Curculio glandium These weevils are very common in my area, and so many acorns are infested with the larvae.<br />
<br />
Female weevils lay their eggs in an acorn via a long ovipositor. The hole is healed by the plant, thus sealing the hole and protecting the weevil eggs from parasites. Upon hatching, the larvae eat the fruit. They are freeze avoidant and can survive the cold winter.. Unfortunately, they can cause a lot of damage to the populations of acorn-bearing trees since they inhibit seed germination.<br />
<br />
Habitat: Living in an acorn that my son decided to use as a baseball. The acorn cracked open and revealed the larva, which he thought looked like butter, lol.<br />
<figure class="photo"><a href="https://www.jungledragon.com/image/85520/acorn_weevil_larva_-_curculio_glandium.html" title="Acorn Weevil Larva - Curculio glandium"><img src="https://s3.amazonaws.com/media.jungledragon.com/images/3232/85520_thumb.jpg?AWSAccessKeyId=05GMT0V3GWVNE7GGM1R2&Expires=1759968010&Signature=LbSqGe9qPtwjl3TAddVsL2RsQ0I%3D" width="138" height="152" alt="Acorn Weevil Larva - Curculio glandium These weevils are very common in my area, and so many acorns are infested with the larvae.<br />
<br />
Female weevils lay their eggs in an acorn via a long ovipositor. The hole is healed by the plant, thus sealing the hole and protecting the weevil eggs from parasites. Upon hatching, the larvae eat the fruit. They are freeze avoidant and can survive the cold winter. Unfortunately, they can cause a lot of damage to the populations of acorn-bearing trees since they inhibit seed germination.<br />
<br />
Habitat: Living in an acorn that my son decided to use as a baseball. The acorn cracked open and revealed the larva, which he thought looked like butter, lol.<br />
https://www.jungledragon.com/image/85511/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85519/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85518/acorn_weevil_larva_-_curculio_glandium.html Acorn weevil,Curculio glandium,Fall,Geotagged,United States" /></a></figure><br />
<figure class="photo"><a href="https://www.jungledragon.com/image/85519/acorn_weevil_larva_-_curculio_glandium.html" title="Acorn Weevil Larva - Curculio glandium"><img src="https://s3.amazonaws.com/media.jungledragon.com/images/3232/85519_thumb.jpg?AWSAccessKeyId=05GMT0V3GWVNE7GGM1R2&Expires=1759968010&Signature=nYSBt2l%2B%2F9EwypYqmOjhJdpHQYo%3D" width="142" height="152" alt="Acorn Weevil Larva - Curculio glandium These weevils are very common in my area, and so many acorns are infested with the larvae.<br />
<br />
Female weevils lay their eggs in an acorn via a long ovipositor. The hole is healed by the plant, thus sealing the hole and protecting the weevil eggs from parasites. Upon hatching, the larvae eat the fruit. They are freeze avoidant and can survive the cold winter.. Unfortunately, they can cause a lot of damage to the populations of acorn-bearing trees since they inhibit seed germination.<br />
<br />
Habitat: Living in an acorn that my son decided to use as a baseball. The acorn cracked open and revealed the larva, which he thought looked like butter, lol.<br />
https://www.jungledragon.com/image/85511/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85518/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85520/acorn_weevil_larva_-_curculio_glandium.html Acorn weevil,Curculio glandium,Fall,Geotagged,United States" /></a></figure><br />
<figure class="photo"><a href="https://www.jungledragon.com/image/85518/acorn_weevil_larva_-_curculio_glandium.html" title="Acorn Weevil Larva - Curculio glandium"><img src="https://s3.amazonaws.com/media.jungledragon.com/images/3232/85518_thumb.jpg?AWSAccessKeyId=05GMT0V3GWVNE7GGM1R2&Expires=1759968010&Signature=zrFXbAtdHk5lP2iQWE%2BFYLcqr5w%3D" width="200" height="174" alt="Acorn Weevil Larva - Curculio glandium These weevils are very common in my area, and so many acorns are infested with the larvae.<br />
<br />
Female weevils lay their eggs in an acorn via a long ovipositor. The hole is healed by the plant, thus sealing the hole and protecting the weevil eggs from parasites. Upon hatching, the larvae eat the fruit. They are freeze avoidant and can survive the cold winter. Unfortunately, they can cause a lot of damage to the populations of acorn-bearing trees since they inhibit seed germination.<br />
<br />
Habitat: Living in an acorn that my son decided to use as a baseball. The acorn cracked open and revealed the larva, which he thought looked like butter, lol.<br />
https://www.jungledragon.com/image/85519/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85520/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85511/acorn_weevil_larva_-_curculio_glandium.html Acorn weevil,Curculio glandium,Fall,Geotagged,United States" /></a></figure> Acorn weevil,Curculio,Curculio glandium,Fall,Geotagged,United States,acorn weevil,acorn weevil larva,beetle,beetle larva,grub,larva,weevil,weevil larva Click/tap to enlarge PromotedCountry intro

Acorn Weevil Larva - Curculio glandium

These weevils are very common in my area, and so many acorns are infested with the larvae.

Female weevils lay their eggs in an acorn via a long ovipositor. The hole is healed by the plant, thus sealing the hole and protecting the weevil eggs from parasites. Upon hatching, the larvae eat the fruit. They are freeze avoidant and can survive the cold winter.. Unfortunately, they can cause a lot of damage to the populations of acorn-bearing trees since they inhibit seed germination.

Habitat: Living in an acorn that my son decided to use as a baseball. The acorn cracked open and revealed the larva, which he thought looked like butter, lol.

Acorn Weevil Larva - Curculio glandium These weevils are very common in my area, and so many acorns are infested with the larvae.<br />
<br />
Female weevils lay their eggs in an acorn via a long ovipositor. The hole is healed by the plant, thus sealing the hole and protecting the weevil eggs from parasites. Upon hatching, the larvae eat the fruit. They are freeze avoidant and can survive the cold winter. Unfortunately, they can cause a lot of damage to the populations of acorn-bearing trees since they inhibit seed germination.<br />
<br />
Habitat: Living in an acorn that my son decided to use as a baseball. The acorn cracked open and revealed the larva, which he thought looked like butter, lol.<br />
https://www.jungledragon.com/image/85511/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85519/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85518/acorn_weevil_larva_-_curculio_glandium.html Acorn weevil,Curculio glandium,Fall,Geotagged,United States

Acorn Weevil Larva - Curculio glandium These weevils are very common in my area, and so many acorns are infested with the larvae.<br />
<br />
Female weevils lay their eggs in an acorn via a long ovipositor. The hole is healed by the plant, thus sealing the hole and protecting the weevil eggs from parasites. Upon hatching, the larvae eat the fruit. They are freeze avoidant and can survive the cold winter.. Unfortunately, they can cause a lot of damage to the populations of acorn-bearing trees since they inhibit seed germination.<br />
<br />
Habitat: Living in an acorn that my son decided to use as a baseball. The acorn cracked open and revealed the larva, which he thought looked like butter, lol.<br />
https://www.jungledragon.com/image/85511/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85518/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85520/acorn_weevil_larva_-_curculio_glandium.html Acorn weevil,Curculio glandium,Fall,Geotagged,United States

Acorn Weevil Larva - Curculio glandium These weevils are very common in my area, and so many acorns are infested with the larvae.<br />
<br />
Female weevils lay their eggs in an acorn via a long ovipositor. The hole is healed by the plant, thus sealing the hole and protecting the weevil eggs from parasites. Upon hatching, the larvae eat the fruit. They are freeze avoidant and can survive the cold winter. Unfortunately, they can cause a lot of damage to the populations of acorn-bearing trees since they inhibit seed germination.<br />
<br />
Habitat: Living in an acorn that my son decided to use as a baseball. The acorn cracked open and revealed the larva, which he thought looked like butter, lol.<br />
https://www.jungledragon.com/image/85519/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85520/acorn_weevil_larva_-_curculio_glandium.html<br />
https://www.jungledragon.com/image/85511/acorn_weevil_larva_-_curculio_glandium.html Acorn weevil,Curculio glandium,Fall,Geotagged,United States

    comments (6)

  1. lol the odds of that discovery! Silly question...how do they breath when they're sealed? Posted 5 years ago
    1. Hmm, well, I'm not sure. Good question! My guess would be that there is still oxygen exchange through the wall of the acorn because acorns are said to "breathe". The larvae have spiracles that are attached to trachea in their bodies. Air enters the spiracles >trachea> rest of the insect's body. Also, I'm pretty sure that insects need less oxygen than other creatures. Posted 5 years ago
      1. Thank you for that excellent answer! Posted 5 years ago
        1. You're very welcome :) Posted 5 years ago
  2. Over here they will drop to the forest floor in fall, together with the acorn, and then eat their way out and dig into the ground deep enough to not freeze. They will pupate in the ground and may optionally either emerge the next year or decide to stay dormant underground for another winter. Posted 5 years ago
    1. Same here! I think some species can take up to 5 years to emerge as adults, but many are faster. The fewer larvae there are in one acorn, the faster they will develop. The one pictured was alone in the acorn and was definitely well-fed. Posted 5 years ago

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''Curculio glandium'' is a species of carpophagus weevil, known as the acorn weevil. It is native to eastern North America. It eats by a rostrum, an elongated snout, that is used for piercing. Male/Female differentiation can be determined using the rostrum as female's are longer. The larvae are short, and cylindrical in shape, and move by means of ridges on the underside of the body. Adults can reach a length of 4 to 8 mm.

Similar species: Beetles
Species identified by Christine Young
View Christine Young's profile

By Christine Young

All rights reserved
Uploaded Oct 10, 2019. Captured Oct 8, 2019 13:17 in 281 Main St S, Woodbury, CT 06798, USA.
  • Canon EOS 80D
  • f/3.5
  • 1/197s
  • ISO100
  • 100mm