antagonist References antagonist biology Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: plant disease/ Biological controlThese organisms are called antagonists; they may occur naturally within the host’s environment, or they may be purposefully applied to those parts of the potential host plant where they can act directly or indirectly on the pathogen. Read MoreThese organisms are called antagonists; they may occur naturally within the host’s environment, or they may be purposefully applied to those parts of the potential host plant where they can act directly or indirectly on the pathogen. Read More