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CIRCULAR 3 9 2, U. S. DEPARTMENT OF AGRICULTURE 



Figure 8. — Symptoms of European foulbrood. A-C, Larvae at the earliest age at which 

 they may be attacked by the disease ; A, earliest symptoms, B, more advanced symptoms, 

 C, scale of a larva that died at this age. D, Healthy larva of slightly older age. E, 

 Sick larva of this age. F, Scale of larva of this age. G, Healthy larva at the oldest 

 age that larvae normally remain coiled on the bottom of the cells. H, I, Larvae of this 

 age dead of European foulbrood. J, Healthy larva just before the cell is capped. K, L, 

 Larvae of this age dead of European foulbrood. M, Dead larva that has been partly 

 removed by the bees. N, Discolored and sunken capping over a dead larva. 0, Punc- 

 tured capping over a dead larva. 



