Which ladybug does NOT feed on aphids?

The ladybug identified as Cryptolaemus montrouzieri is known to feed primarily on mealybugs rather than aphids. This particular species is often utilized in biological control programs focused on managing mealybug populations in various crops.

Conversely, Hippodamia convergens, commonly known as the convergent lady beetle, is well recognized for its diet that includes a wide range of aphid species. Therefore, when considering which ladybug does not consume aphids, Cryptolaemus montrouzieri is the correct choice in this context.

Understanding the dietary habits of different ladybug species is crucial in integrated pest management, as it allows for the implementation of more effective biological control strategies tailored to specific pests present in the environment.