. American bee journal. Bee culture; Bees. 1920 AMERICAN BEE JOURNAL 341 The few colonies which probably be- came infected in this way stood next to heavily diseased ones. The infec- tion possibly, in these few cases, re- sulted from a heavy drifting of bees or slow robliing. So far, however, ex- perimental evidence is insut'ticient to demonstrate to what extent the dis- ease is spread by drifting bees or as a result of different degrees of rob- bing. Excepting the few cases just men- tioned, the healthy colonies of the experimental apiary suflfered no infec- tion, apparently, from the disease
. American bee journal. Bee culture; Bees. 1920 AMERICAN BEE JOURNAL 341 The few colonies which probably be- came infected in this way stood next to heavily diseased ones. The infec- tion possibly, in these few cases, re- sulted from a heavy drifting of bees or slow robliing. So far, however, ex- perimental evidence is insut'ticient to demonstrate to what extent the dis- ease is spread by drifting bees or as a result of different degrees of rob- bing. Excepting the few cases just men- tioned, the healthy colonies of the experimental apiary suflfered no infec- tion, apparently, from the diseased ones present. From this fact, it may l)e concluded that the disease is not likely to be spread from flowers which have been visited by bees from dis- eased colonies and afterwards by others from healthy ones. The same fact leads to the conclusion that the water supply of the bees of the ex- perimental apiary was not a fruitful source of infection. It should be mentioned, however, that no stagnant or slow moving body of water was near by. A definite statement regard- ing the , if any, to which the water suppl}' of an infected apiary helps to spread the disease, is not justified from the experimental evi- dence thus far obtained. Since American foulbrood can be readily produced experimentally, in a colony, by feeding it syrup or honey to which the spores of the germ have been added, naturally the robbing by bees of honey which contains such spores would likelj' cause disease in the colonies to which such bees be- long. When brood frames from Ainerican foulbrood colonies are placed in healthy colonies they serve to trans- mit the disease. Should this be done by the practical apiarist during the manipulations in the apiary, naturally a spread of the disease in this way would likely occur. The fact that there was practically no spread of the disease, from colony to colony, in the experimental apiary, shows that the hands, the hive tool, the smoker and the clothing are not l
Size: 1969px × 1269px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1860, booksubjectbees, bookyear1861
