Chemical ecology

right|thumb|A fanning honeybee exposes [[Nasonov's gland (white – at tip of abdomen) releasing pheromone to entice swarm into an empty hive]]

thumb|336x336px|The Amanita muscaria mushroom, an iconic toxic mushroom.

thumb|Casuarina equisetifolia litter completely suppresses germination of [[understory plants as shown here despite the relative openness of the canopy and ample rainfall (>120 cm/yr) at the location.]]

thumb|upright=1.5 |The bright colours of this granular poison frog signal a warning to [[predators of its toxicity.]] thumb|upright=1.5 |The honey badger's [[reverse countershading makes it conspicuous, honestly signalling its ability to defend itself through its aggressive temperament and its sharp teeth and claws.]]

organic compound that is not directly involved in the normal growth, development, or reproduction of an organism

form of mimicry where a harmless species has evolved to imitate the warning signals of a harmful species

agricultural technique

natural phenomenon in which two or more distasteful species, that may or may not be closely related and share one or more common predators, have come to mimic each other's warning signals

study of chemicals involved in the interactions of living organisms

range of adaptations evolved by plants which improve their survival and reproduction by reducing the impact of herbivores; plant defensive strategies (defensive traits) to defend against damage caused by herbivores

thumb|Dasyscolia ciliata on the flowers of [[Ophrys speculum]]

substance which repels insects

A semiochemical, from the Greek σημεῖον (semeion), meaning "signal", is a chemical substance or mixture released by an organism that affects the behaviors of other individuals. Semiochemical communication can be divided into two broad classes: communication between individuals of the same species (intraspecific) or communication between different species (interspecific).

type of insect trap that uses pheromones to lure insects

signal made by social animals and people to warn others of danger

A kairomone is a semiochemical released by an organism that mediates interspecific interactions in a way that benefits a different species at the expense of the emitter. Derived from the Greek καιρός, meaning "opportune moment", it serves as a form of "eavesdropping", enabling the receiver to gain an advantage, such as locating food or evading predators, even if it poses a risk to the emitter. Unlike allomones, which benefit the producer at the receiver's cost, or synomones, which are mutually beneficial, kairomones favor only the recipient. Primarily studied in entomology, kairomones can play

capacity of a plant to defend itself against pathological processes or agents (usually via innate immunity)

An attractant is any chemical that attracts an organism, e.g. i) synthetic lures; ii) aggregation and sex pheromones (intraspecific interactions); and iii) synomone (interspecific interactions)

plant that attracts agricultural pests away from nearby crops

insect pest management technique

pheromone released by an organism to attract an individual of the opposite sex

object or method for deterring animals

strategy employed by many organisms to avoid consumption by producing toxic or repellent metabolites

communication between plants and other organisms

journal

intercropping strategy for controlling agricultural pests

scent created by aroma compounds emitted by floral tissue

paired exocrine gland in many hoofed animals