Diseases: Diseases. Grains are subject to a variety of ungal diseases that may severely reduce the delds. These diseases include rusts, smuts, >ovdery mildews, and ergot. Control measures nclude eradication of the alternate host, if there s one, and the breeding of disease-resistant vari-'ties. Insect depredation may also markedly re-luce yields. Insects may feed upon the growing )lants or on the harvested grain.
Further Reading: Craplet, Camille C., The Dairy Cow (London 1963); McCabe, Terrence W., and Mitchell, Harley W., Animals That Give People Milk (Chicago 1957); Smith, Vearl R., Physiology of Lactation, 5th ed. (Ames, Iowa, 1959).
6. Diseases
Cattle are subject to a wide variety of infectious and nutritional diseases that can cause serious economic losses. The most important of the diseases that commonly affect cattle are discussed below. |
