sacbrood_side
Side view of dead larva killed by sacbrood virus. Notice the discoloration and hardening of cutiles near the head. Photo by Prof. M.V. Smith, University of Guelph. Side view of dead larva killed by...
View Articlechalkbrood_cell
Chalkbrood, whereby the larvae becomes mouldy with white hyphae (vegetative body of fungi), then hardened to be similar to pieces of white chalk (hence the name). Caused by a fungus (Ascosphaera...
View Articlechalkbrood_out
Chalkbrood mummies removed from cells. The two on the top are producing spores, while the three below are at a slightly earlier stage. Photo by Prof. M.V. Smith, University of Guelph. Chalkbrood...
View Articlechalkbrood_spore
Chalkbrood mummies removed from cells. The mummies in the top row are producing many spores, which make the mummie totally black. This stage is now contagious. The mummies in the bottom row are nto...
View Articlechewup_waxcocoon
Closeup view of the emptied cocoons from where the adult moths have emerged. Photo by Prof. Zachary Huang, Michigan State University. Closeup view of the emptied cocoons from where the adult moths...
View ArticleP2080223
The greater wax moth (Galleria mellonella) larvae, shown with various instars. Photo by former graduate student Anne Hanley. The greater wax moth (Galleria mellonella) larvae, shown with various...
View Articlewaxmoth1
A comb severely infected with the greater waxmoth. The while ones are the cocoons spun by mature larvae just before they pupate. Silk and frass are everywhere making this frame not usable for...
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Just before the wax moth larvae spun their cocoons, they use the mandibles to chew an indentation on wood so that the cocoon would attach better. Notice the dead workers near the lower left of the...
View Articlewaxmoth3
The lesser wax moth (Achroia grisella, Pyralidae), causing similar damage to the greater wax moth but is not as common in Michigan. Photo by Prof. M.V. Smith, University of Guelph. The lesser wax moth...
View Articletracheal
A cross section of the thorax of a worker, showing the main thoracic trachea of each side. Trachea from healthy workers should be white with a silvery reflection. The ones here are infected with...
View Articletracheal_mite
Two tracheal mites (Acarapis woodi) inside a worker trachea. Too many mites in there obviously blocks the airway of workers and workers become physically weaker and cannot fly as far and die earlier...
View Articlepupalmite_s
Varroa mites (Varroa destructor) on a drone pupa that was removed from its cell. Varroa mites (Varroa destructor) on a drone pupa that was removed from its cell.
View Articlevarroa1
No, this is NOT a staged picture! Last October some colonies were dying and being robbed. On close inspection they were having very severe cases of PMS (parasitic mite syndrome). Very few brood cells...
View Articlevarroa2
Another larva with 5 varroa mites on one side, I am sure a few ran away... You can tell that the larva was dead by its abnormal coloration. MSU apiary. Oct 14, 2002. Another larva with 5 varroa mites...
View Articlemiteonbee
A varroa mite (Varroa destructor) on the back of a worker bee (the one in the center). A varroa mite (Varroa destructor) on the back of a worker bee (the one in the center).
View ArticleDSCN0963
Stages of varroa (Varroa destructor) mites. Younger ones on left, all white mites will die when a bee emerges out. The 2nd one from right would be able to live. Her cuticle will become redder after...
View Articlemiteunderscope
Varroa mites (Varroa destructor) floating in alcohol under a dissecting scope. Varroa mites (Varroa destructor) floating in alcohol under a dissecting scope.
View Articlemitedamage
A varroa mite (Varroa destructor) on the back of a worker bee. The bee on the bottom has her wings unexpanded -- a sign of varroa damage during her pupal stage. A varroa mite (Varroa destructor) on...
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