use of organic fertilizers
small pox
You didn't pay attention in Health class did you?
There are several ways to prevent diseases: vaccines, clean environment, looking for medical help when needed and doing medical check ups.
yes it helps to stop sreading diseases as it would sprea i
I depends on the disease. Viral diseases often have vaccines. Heart disease can be prevented with good diet and excercise. Mosquito borne diseases can be prevented by using insect repellent.
Epidemiologist
Epidemiologist
Columbian exchange
Snapdragons or Antirrhinum are prone to rust. This is why although they are perennial plants they are usually grown as annuals.
S. P. Raychaudhuri has written: 'A manual of virus diseases of tropical plants' -- subject(s): Tropics, Virus diseases of plants, Tropical plants, Diseases and pests 'Virus and mycoplasma diseases of plants in India' -- subject(s): Mycoplasma diseases in plants, Virus diseases of plants 'Land and soil'
Columbian exchange
Columbian Exchange