Trophobiosis is a symbiotic
Symbiosis is close and often long-term interaction between different biological species. In 1877 Bennett used the word symbiosis to describe the mutualistic relationship in lichens...

 association between organism
In biology, an organism is any contiguous living system . In at least some form, all organisms are capable of response to stimuli, reproduction, growth and development, and maintenance of homoeostasis as a stable whole.An organism may either be unicellular or, as in the case of humans, comprise...

s where food is obtained or provided. The provider of food in the association is referred to as a trophobiont.

The term is also used for a theory of pest resurgence on crops propounded by Francis Chaboussou. Chaboussou was an agronomist at the French National Institute of Agricultural Research (INRA
Institut National de la Recherche Agronomique
The Institut National de la Recherche Agronomique is a French public research institute dedicated to scientific studies surrounding the problems of agriculture...

), and he published Healthy Crops: A New Agricultural Revolution in 1985. The essence of Chaboussou's trophobiosis theory
The English word theory was derived from a technical term in Ancient Greek philosophy. The word theoria, , meant "a looking at, viewing, beholding", and referring to contemplation or speculation, as opposed to action...

 is that the application of pesticides to crops makes those crops more susceptible to pest attack, and as a consequence pesticide-based farming creates a cycle of increasing dependence on pesticides.
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