Aphides
From Allotments4All
Common pests and how to deal with them
Green, brown or black flies, of small size but always in great numbers, infest various crops. Spray with soapy water or with paraffin emulsion, made as follows: Dissolve a handful of soft soap in boiling water. Add a wineglassful of paraffin and two gallons of water. Stir well, spray as required.
