What is this white stuff in citronella plant and how can I remove it? It looks like a type of insect. Both of my citronella plants have that. Is it contagious?
I started spraying it today with soap water.
Looks like mealybugs. More info here: https://getbusygardening.com/how-to-kill-mealybugs/
You can wash them away with soap water, spray with pyrethrum spray or white oil. Also, alcohol kills them.
Just check any spray on one branch first, as it can sometimes damage the leaves.