Which of the following disease is caused by Mycoplasmas ?

🔑Key Points
Mycoplasmas known as Joker of the plant kingdom are responsible for Aster yellows disease in many plants.
Mycoplasmas are the smallest free-living organism.
It will induce yellowing and restricts plant growth by malformation and reduce flower sterility.
It affects both quantity and quality of yield.
It is greatly seen in carrots.
🛑Additional Information 1. Crown gall is caused by the bacterial plant pathogen, Agrobacterium tumefaciens.
2. Soft rots are caused mainly by Pectobacterium carotovorum.
3. Fireblight is caused by the bacterium Erwinia amylovora.