C. Ticks are controlled by insect stripes. D. Mosquitoes transmit diseases. Avoid overcrowding Prevent contact with wild birds Treat with specific drugs, poultry wormers Use piperazine, phenothiazine, dibutyltin dilaurate Nutritional Deficiencies Minerals Deficiency Symptoms Calcium Rickets, poor egg shell quality. Phosphorous Rickets, poor egg shell quality. Zinc Poor feathering, short bones.
Embryos die at second and third day of incubation.
D Soft, spongy beaks and bones. Poor egg quality, thin shells, rickets in young birds. E Low hatchability. Embryos die at fourth day of incubation. Degeneration of muscles.