Bsph is known to produce long residual effects and is active against which groups of larvae?

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Multiple Choice

Bsph is known to produce long residual effects and is active against which groups of larvae?

Explanation:
Bacillus sphaericus (Bsph) is a bacterial larvicide used in mosquito control. It stays active for a long time in water, so treated water remains toxic to larvae over an extended period. Bsph is effective against Culex and Anopheles larvae because the toxin works in the larval gut of these genera, where the susceptible receptors are present. Aedes larvae are not reliably susceptible to Bsph, so it’s not considered effective against that group. Since its action targets larvae, not pupae, and it doesn’t affect all mosquito larvae equally, the best answer points to Culex and Anopheline larvae.

Bacillus sphaericus (Bsph) is a bacterial larvicide used in mosquito control. It stays active for a long time in water, so treated water remains toxic to larvae over an extended period. Bsph is effective against Culex and Anopheles larvae because the toxin works in the larval gut of these genera, where the susceptible receptors are present. Aedes larvae are not reliably susceptible to Bsph, so it’s not considered effective against that group. Since its action targets larvae, not pupae, and it doesn’t affect all mosquito larvae equally, the best answer points to Culex and Anopheline larvae.

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