About 18 mths - 2 years ago I was having a problem with minute pests in my phals and someone on here suggested I try spaying them with Neem Oil and Horticultural Soap. (Where I live it is very difficult to get much in the way of effective branded pesticides.) I got these through Amazon and they worked wonders for me. The bonus was lovely clean, shiny leaves! As a preventative I spray them once a month, both sides of every leaf and every nook and cranny! I then tip the pot sideways to remove as much liquid as possible from the crown and leaf joints before standing in warmth, shade and a light breeze for an hour before returning to their normal places indoors. I do the spraying outdoors because of the smell (which I quite like!) and the mess. I also check each crown as I replace the plant and use a folded piece of tissue if needs be to remove any last trace of moisture. Best to start the procedure in the morning so all foliage can dry out well before temps drop in the evening.
Works for me in my environment!
Not cheap but a little goes a long way!
Edit: don't spray Neem anywhere near Milkweed/Monarch caterpillars, butterflies!
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