The flea beetle has a narrow host range to plants primarily in the brassicaceae. Most of the flea beetles prefer cruciferous plants which produce allyl isothiocyanate, known as aggregation pheromone of the cabbage flea beetle. The most-preferred hosts are in the genus Brassica (Cruciferae), which include the major agricultural host attacked by flea beetle, oil rapeseed and mustard.
Beetles emerge