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Blueberry Stem Gall Wasp (Hemadas nubilipennis) Kidney-shaped gall on the stem of Blue Ridge Blueberry (Vaccinium pallidum).<br />
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This species of wasp is parasitic on blueberry species (Vaccinium sp.). It can become a pest as the formation of galls limits fruit production. Wasps (which are almost all female) emerge from previous galls in spring for mating season. Females pierce the lower surface of the blueberry stems and deposit their eggs there. Additionally, they stab the shoot tips in order to prevent more growth. The plant reacts to the deposition of eggs with the formation of galls. Branches with galls are incapable of producing flowers or fruit. It is recommend that prescribed burns be performed in fall to control any problems. Blueberry Stem Gall Wasp,Geotagged,Hemadas nubilipennis,Spring,United States,blueberry gall,gall,galls,hemadas,hymenoptera,insect,insecta,stem gall,vaccinium gall,wasp,wasp gall Click/tap to enlarge PromotedSpecies introCountry intro

Blueberry Stem Gall Wasp (Hemadas nubilipennis)

Kidney-shaped gall on the stem of Blue Ridge Blueberry (Vaccinium pallidum).

This species of wasp is parasitic on blueberry species (Vaccinium sp.). It can become a pest as the formation of galls limits fruit production. Wasps (which are almost all female) emerge from previous galls in spring for mating season. Females pierce the lower surface of the blueberry stems and deposit their eggs there. Additionally, they stab the shoot tips in order to prevent more growth. The plant reacts to the deposition of eggs with the formation of galls. Branches with galls are incapable of producing flowers or fruit. It is recommend that prescribed burns be performed in fall to control any problems.

    comments (3)

  1. Cool! Posted one year ago
    1. I thought so too! At first, I thought it was a deformed blueberry! Then I realized what it probably was and had to go research! Posted one year ago
      1. Yet another awesome gall <3 Posted one year ago

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Hemadas nubilipennnis is a pteromalid wasp which creates stem galls on blueberry species (Vaccinium spp.). Larvae develop inside the gall. They emerge as adults in spring.

Species identified by Lisa Kimmerling
View Lisa Kimmerling's profile

By Lisa Kimmerling

All rights reserved
Uploaded Jun 4, 2018. Captured Jun 2, 2018 05:09 in 381 Dally Cove Rd, Ranger, GA 30734, USA.
  • Canon EOS DIGITAL REBEL XTi
  • f/5.0
  • 1/200s
  • ISO400
  • 60mm