What is another word for aphids?

Here are some other words for aphids, depending on the context:

Formal:

* Plant lice: This is a common alternative term, particularly in scientific contexts.

* Greenfly: This term specifically refers to aphids that are green in color.

* Blackfly: This term refers to aphids that are black in color.

Informal:

* Bug

* Pest

* Little suckers (referring to their feeding habits)

The best word to use will depend on the specific situation and your audience.