An herbicidal maniac?
A Botanist is someone who studies plants.
A person who studies plants could be an agronomist or a botanist.
A person who teaches about plants is called a botanist or a horticulturalist, depending on the specific focus of their expertise.
if you mean house plants , then the quickest and most often is by over watering
A person that grows plants is called a farmer.
The term for a person who kills a king is a "regicide."
A Botanist is someone who studies plants.
Biologist
The organisms which eat insects are called insectivores.
A person who kills a lot of people is typically referred to as a mass murderer or a serial killer. These terms are used to describe individuals who have committed multiple murders.
A person who studies flowers and plants is called a botanist.
A person who studies plants could be an agronomist or a botanist.
An assassin (assassination is the action of doing so). Simple, but answers the q
it kills the plant
When you shoot someone on the opposing team and one person on your team kills the person you shot. It's short for assisted kill though
Vinegar kills plants.
A person who gives water to plants is commonly called a gardener or a plant caregiver.