"Mdudu katika embe"

Translation: An insect in a mango

[s.rombaut]

What's the difference between "katika" and "ndani ya"?

[MuziraRobert]

This can also be "An insect pest in the mango". Any insect in a mango is considered a pest.

[machieng]

it would be either insect or pest, not both. And even then, 'pest' is a very general term meaning any unwanted creature (or person)

[JasonFries2]

Is this a phrase like "a fly in the ointment"