. Beekeeping in the Midwest. Bees; Bee culture. Two larvae, in un- capped cells, infec- ted with sacbrood disease. (Fig. 71) • numbers of affected larvae. The disease usually requires no treatment. In severe cases, the colony should be requeened with a young queen from a different strain of bees. Other brood diseases. Another brood disease has become estab- lished in many areas of the Midwest. It is called chalkbrood and is caused by a fungus organism called Ascosphaera apis. The fungus kills the larva after it is stretched out in the cell, turning it into a hard, white mummy. It may be covere
. Beekeeping in the Midwest. Bees; Bee culture. Two larvae, in un- capped cells, infec- ted with sacbrood disease. (Fig. 71) • numbers of affected larvae. The disease usually requires no treatment. In severe cases, the colony should be requeened with a young queen from a different strain of bees. Other brood diseases. Another brood disease has become estab- lished in many areas of the Midwest. It is called chalkbrood and is caused by a fungus organism called Ascosphaera apis. The fungus kills the larva after it is stretched out in the cell, turning it into a hard, white mummy. It may be covered with small black spots, which are the , reproductive bodies of the fungus. Such mummies can be seen in the combs of infected colonies and on the landing boards of the hives where they are often dropped by house-cleaning bees. The disease may become severe in some colonies but is not expected to be a serious problem for beekeepers. There are probably differences in resistance among strains of bees, and requeening with a different strain may be of value in some , cases. No control measures using drugs or chemicals are approved ; as yet. Diseases too rare to discuss are parafoulbrood, a bacterial disease j similar to European foulbrood, and stonebrood, caused by a fungus. Plant poisoning of brood is also rare in the Midwest. Chilled or starved brood may sometimes be confused with diseased i brood. Such brood is usually found outside the cluster area of small colonies and lacks most of the specific symptoms of the diseases because all brood stages may be affected. When the weather warms or the colony receives a new supply of food, the bees will quickly clean out all of the dead brood. 139. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Jaycox, Elbert R. Urbana-Champaign : University of Illinois Cooperative
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