Flea Beetle on brassica leaves, ways to reduce the damage

Small shiny beetles hop on and eat holes in young leaves of radish, rocket, kale, pak choi and other vegetables of the brassica (cabbage) family. I show how I manage their almost constant presence. Flea beetles are most prevalent in inland areas where there are nearby field crops of oilseed rape/canola. However they are also becoming more common elsewhere. You may be fortunate and not suffer them! Another method to reduce their population is by applying a sticky substance to a piece of yellow card or plast