Antagonism (phytopathology)

In phytopathology, antagonism refers to the action of any organism that suppress or interfere the normal growth and activity of a plant pathogen, such as bacteria or fungi.

this organisms can be used for pest control and are referred to as ``Biological Control Agents´´. They may be predators, parasites, parasitoides or pathogens which attacks harmful insect, weed or plant disease.

'Antagonism - Mechanism'

Antibiosis example- enzymes, toxins, antibiotics. Direct parasitism example- biotrophic or necrotrophic. competition example- for nutrients. Induced resistance(indirect).