Food attractants
a) CO2 , water and lactic acid: blood sucking insects
b) Fruit fly ( Docus dorsalis) : methyl eugenol
c) Molasses: Cut worm and army worm
Sex attractants
a) Sex pheromone:
- Chemically regulating insect behavior are commonly called semi chemicals.
- Semio-chemicals collectively includes pheromone, Allomone and kairomone.
- Since, pheromone are secreted outside the body so are called ectopheromone.
b) Alarm pheromone:
- Reported on homopotera, Isoptera and Hymenoptera.
i) Aphids: pair of cornicles ( secrete tarpens) or siphunculi.
ii) Dysercus : Abdomen terga
iii) Termites (Secrete monoterpene) : Cephatice glands.
iv) Worker bee: Sting apparatus and mandibular glands.
v) Ant ( Secrete ethyl methyl ketone and formic acids) : mandibular glands.
c) Trial pheromone:
- Used for reaching the destination for mating or utilize food source.
- Eg: Poison , rectal and labial glands in Ants.
- Labial glands in caterpillar.
d) Aggregation pheromone:
- In insects for protection, reproduction and feeding.
- Secretion stops after mating or continued feeding to prevent over feeding.
- Mostly in coleoptera.
- Eg; Geranoil, Genaoic acid and Necrolic acid in honeybee.