Two products from Bayer and Syngenta will be allowed to help protect crops from the flea beetle.
BBC(Jul 23, 2015)
Guard against the flea beetle, cut worm, cabbage worm and cabbage maggot in the same manner as with cabbage.
Crozier, A. A. (Arthur Alger), The Cauliflower(2010)
Bordeaux mixture will also keep away the flea beetle to a large extent.
Bailey, L. H. (Liberty Hyde), Manual of Gardening (Second Edition...(2010)