Therioaphis trifolii, the yellow clover aphid, is a species of aphid in the family Aphididae. It is found in Europe.
Subspecies These three subspecies belong to the species Therioaphis trifolii: Therioaphis trifolii albae Bozhko, 1959 Therioaphis trifolii trifolii (Monell, 1882) Therioaphis trifolii ventromaculata Müller, 1968
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