Pheromones

Pheromones : Recently, Scientists have successfully demonstrated that manipulating pheromones in locusts can prevent them from forming destructive swarms or engaging in group behaviors that lead to mass feeding frenzies.

o This breakthrough offers a promising strategy for controlling locust outbreaks by disrupting their communication signals.

• About Pheromones: Chemical substances secreted outside the body by an individual and detected by another of the same species.

o They are present in all bodily secretions, especially in axillary sweat, and are sensed by the olfactory system.

o Pheromones are classified as ecto-hormones because they act outside the body.

o Types of Pheromones: Releaser Pheromones – Trigger an immediate and specific response.

- Signaler Pheromones – Convey information about the individual (e.g., help a mother recognize her baby).

- Modulator Pheromones – Influence mood and emotional states.

- Primer Pheromones – Affect hormonal activity, such as during pregnancy or menstrual cycles.

• Role of Pheromones in Animals and Other Organisms: In animals, pheromones help raise alarms, mark food trails, warn intruders, and bond with offspring.

o Detected via the vomeronasal organ.

o Fungi, slime molds, and algae use them to attract mating types during reproduction.