Sacbrood is caused by a bee virus (Morator aetotulas). Larvae die right before or shortly after the cells are capped. Here is a dead larva right before the cell is fully capped. Photo by Prof. M.V. Smith, University of Guelph. *Viewed: 1006 times.
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A closeup of the head of sacbrood virus killed larva. Photo by Prof. M.V. Smith, University of Guelph. *Viewed: 961 times.
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The heads of larvae killed by sacbrood virus, with the cell capping removed. Photo by Prof. M.V. Smith, University of Guelph. Viewed: 955 times.
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