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semiochemical
A semiochemical (from Greek ''semeon'' meaning "signal") is a generic term used for a chemical substance or mixture that carries a message for purpose of communication. Semiochemical communication can be divided into two broad classes: communication between individuals of the same species (intraspecific) or communication between different species (interspecific).
It is usually used in the field of chemical ecology to encompass pheromones, allomones, kairomones, attractants and repellents.
Many insects, including parasitic insects, use semiochemicals, which are natural chemicals released by an organism that affect the behaviors of other individuals. Pheromones are intraspecific signals that aid in finding mates, food and habitat resources, warning of enemies, and avoiding competition. Interspecific signals known as allomones and kairomones have similar functions.
==In nature==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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