''Neotoxoptera formosana'' or the Onion aphid, is an aphid in the superfamily Aphidoidea in the order

Hemiptera Hemiptera (; ) is an order (biology), order of insects, commonly called true bugs, comprising over 80,000 species within groups such as the cicadas, aphids, planthoppers, leafhoppers, Reduviidae, assassin bugs, Cimex, bed bugs, and shield bugs. ...

. It was originally discovered in Taiwan in 1921, but has spread all around the world. The aphid is dark reddish brown in color. Host plants include ''Allium ascalonicum'', ''Allium cepa'', ''Allium chinense'', ''Allium fistulosum'', ''Allium porrum'', ''Allium sativum'', ''Allium schoenoprasum'', and ''Allium tuberosum''. The aphid is a carrier of garlic latent potyvirus and alstroemeria mosaic potyvirus.

References

Insects of Taiwan Insects described in 1921 Macrosiphini Taxa named by Ryoichi Takahashi {{Aphididae-stub