10 



STATE ENTOMOLOGIST OF COLORADO 



HOW TO CONTROL FOULBROOD 



Ridding Colorado apiaries of foullarood is almost entirely in the 

 hands of the beekeepers themselves. Through cooperative effort only 

 can the amount of disease be reduced to a minimum. In counties 

 where inspectors are paid and educational work is being carried on, 

 they are getting the better of the disease. 



Figure 6 — American Poulbrood in an Advanced Stage. Courtesy 

 American Bee Journal. 



The three brood diseases more or less common in Colorado are Amer- 

 ican foulbrood, Eumpean foulhrood and sacbrood. 



American foulbrood occurs wherever it has l)een carried eithei- by 

 human agencies or liy the bees themselves. As far as the writer 

 knows, Eurojjean foulbrood in the last few years has occurred only 

 in two h)calities in tliis state. It is a disease which should not cause 

 much trouble in the alfalfa region. 



Sacbrood is more wi(h;'si)read and occurs during the spring in most 

 apiaries in the State. 



