I have them on everything, they seem to be rife in the area at the moment, Roses have been worst hit but thats another area entirely. I have been spraying my tomatoes and cucumbers, which seem to more be affacted by blackfly, and today I have an assortment of flies and eggs on my cabbages. So Im going to have to arrange some sort of netting, Im guessing very fine netting to keep blackflies off. What should I use? Also I only have a small number of cabbage in this bed (3) so I dont want to cover the whole of a bed, plus I want to keep it as ornamental a garden as possible, is there anything niceish looking that will do the job?