pictured above: The Lupin aphid or, the Macrosiphum albifrons.
When I was about 5 or 6, one of the first things I thought myself to do was to get Geraniums to produce roots by simply placing them in a saucer of water. My pocket money, far better spent on compost (and football stickers) once I’d figured that technique out and moved onto propagating Cacti, that in mind, could never afford me the luxury of purchasing rooting powder. Back to the geraniums, their biggest pest was the Aphid; better known to you may be as whitefly or, Trialeurodes vaporariorum to be exact.