I found these little beasties today on my Pleurisy Root plant (Asclepias tuberosa). They’re often called the oleander aphid. I put a tsp of cooking oil, a tsp of liquid soap into about 600mls (a pint?) of water and sluiced them with that. A cotton wool bud dipped in alcohol and dabbed on them will work too.
Watch for Monarch butterfly eggs though because both of these remedies will kill them too.
I’d never seen them either until I moved out here. They thrive on the Narrow leaf cotton bush, Gomphocarpus fruticosus, a declared weed in Australia. It’s everywhere on the farms around here and sometimes you see entire plants covered in them.
Unfortunately, they also like Pleurisy root.
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