Defensive mechanisms of bee colony and silkworm. Diagnostic methods of bee and silkworm pests. Preventive measures for diseases and enemies. Diseases of bees and silkworms that caused by viruses, bacteria, fungi and  protozoa. Enemies of the bee colony (mites, insects, birds, mammals). Non infectious diseases of bees and silkworms. Poisoning of bees from pesticides and toxic plants. Sanitary of hive products.