There are millions, perhaps billions of micro-organisms which come in contact with plants every day.
There are many organisms (fungal, bacterial and viral) which live in the soil, in water, and sometimes in air, which are harmful to plants.
They are responsible for serious diseases in plants, and can kill individual plants, and even destroy entire crops.
The copyright of the article What are Plant Pathogens? in Desert Gardens is owned by Robert Dailey. Permission to republish What are Plant Pathogens? must be granted by the author in writing.
