Plant state detection system and odor detector

A plant state detection system comprising:

• a plurality of odor detectors arranged in a cultivation area in which plants are cultivated, each odor detector including an odor detection unit configured to detect an odorant emitted from a plant;
• and
• a plant state detector configured to acquire odor information detected by the odor detection unit and detect states of the plants based on the odor information,
• wherein the plant state detector includes a display control unit configured to display the states of the plants corresponding to arrangement positions of the plurality of odor detectors, and to cause display modes for the respective arrangement positions in the cultivation area to be changed stepwise according to the degree of plant state,
• wherein the plant state detector is configured to determine whether the plant is in a normal state, a caution state, or a warning state based on a detection level of the odorant;
• and
• wherein the display control unit is configured to display the normal state, the caution state, and the warning state in different colors, and to cause display modes respectively corresponding to the normal state, the caution state, and the warning state to be displayed such that the display becomes darker as the state of the plant becomes worse.