Name any two bacterias and the diseases caused by them in plants.

Bacteria:

1. These are unicellular, prokaryotic organisms.
2. They do not have a well-defined nucleus or membrane-bound organelles.
3. They have a cell wall made of peptidoglycan.
4. They are known as decomposers and help in cleaning the environment.
5. However, some of them are also pathogenic in nature.
6. Example: Erwinia amylovora, MLO (Mycoplasma-like organisms).

1. Diseases caused by Erwinia amylovora:

Fire blight: Blossoms of the plant appear watery and soaked.

2. Diseases caused by MLO (Mycoplasma like organisms):

Crown gall: Ball-shaped outgrowths appear on stem and branches.