Question

For cat fleas in larval stage, what stage would an igr prevent them developing into?

a) egg
b) pupae
c) larva
d) adult

Answer 1

An Insect Growth Regulator (IGR) prevents cat fleas in the larval stage from developing into the pupal stage, disrupting the flea lifecycle and preventing them from becoming adults.

Step-by-step explanation:

An Insect Growth Regulator (IGR) is a type of chemical that mimics hormones in young insects. These chemicals are designed to disrupt the normal development of insects, and they are often used in pest control to prevent populations from reaching maturity. When an IGR is used on cat fleas in the larval stage, it will prevent them from developing into the pupal stage.

After an egg hatches and becomes a larva, the larva undergoes various molts until it reaches the pupal stage. The pupal stage is the transition period during which the immature insect metamorphoses into an adult. By inhibiting this pivotal stage, the IGR effectively breaks the lifecycle of the flea, ensuring it does not reach adulthood and reproduce.

Answer 2

An Insect Growth Regulator (IGR) would prevent cat fleas in the larval stage from developing into the pupal stage, effectively stopping them from reaching adulthood. B is the correct answer.

Step-by-step explanation:

Insect Growth Regulator (IGR) Impact on Fleas

For cat fleas in the larval stage, an Insect Growth Regulator (IGR) would prevent them from developing into the pupal stage. IGRs are pest control substances that mimic hormones in young insects. Fleas undergo complete

metamorphosis, which means their life cycle comprises distinct stages: egg, larva, pupa, and adult.

An IGR interferes with the hormones responsible for transitioning from the larva to the pupa, consequently stopping the lifecycle before fleas can reach maturity.

This effectively reduces the flea population by preventing immature fleas from becoming breeding, biting adults.