Phyllotreta nemorum, the turnip flea beetle or yellow-striped flea beetle is a species of beetle in family Chrysomelidae.

The beetle is 2.4-3.5 mm long and black with sinuate yellow bands running down its elytra.

[3] The beetle feeds on various wild and cultivated Brassicaceae, and also on mignonettes (Reseda spp.)

Adults consume leaves while larvae are leaf-miners.

They are themselves preyed on by swifts (Apus apus) and parasitised by braconid and eulophid wasps.