apple aphid vs Aphis pomi

apple aphid and Aphis pomi both are nouns.

Word	Noun	Adjective	Verb	Adverb
apple aphid	Yes	No	No	No
Aphis pomi	Yes	No	No	No

As nouns, apple aphid and Aphis pomi are synonyms defined as:

apple aphid and Aphis pomi: bright green aphid; feeds on and causes curling of apple leaves

Other synonyms of apple aphid include green apple aphid.

apple aphid (noun)	Aphis pomi (noun)
bright green aphid; feeds on and causes curling of apple leaves	bright green aphid; feeds on and causes curling of apple leaves