..be sure to carefully check them all for unusual discolored marks on leaves and tiny hard black grains of poo at those marks ...
I had an explosion of thrips on my anthurium - first obvious sign was slightly deformed new leaves.
Spider plant had thrips too - it was too far gone when I've finally figured out what it was.. the sign was pale green blotches on leaves and some hard black specks here and there.. same on monstera adansonii, but this one is recovering with regular soapy sprays..
Syngonium had them as well - on this one I actually saw them moving on the undersides of the leaves after it started developing small dry patches. Caught early and now clean (hand picking, soap spray, removal of top layer of soil)
Philodendron Basil came severely infested with thrips from the store... Clearest sign - disfigured new leaves and dry/discolored marks all over oldest leaves. This purchase has surely taught me a lesson
It was finally cut to the ground and is slowly regrowing fresh vines with nice leaves. Appears to be clean with regular soap sprays..
They even attack the tough sansevieria! Until today, I was sure it was some bacterial/fungal crown problem... looked like rust in the center... Damn.. I've
literally just figured this one out
after reading this .. No one on a houseplant forum could explain what was happening to my hahnii and I decided to get rid of them to prevent the spread of "infection"..
Once you learn to notice them, you start seeing these critters everywhere
Btw, the above linked article says "
Primary foliage hosts for thrips are: Aphelandra, Ardisia, Dieffenbachia, Ficus, Nephthytis, Philodendron, Sansevieria and Schefflera."
Inspect each plant regularly, flip some leaves to check undersides for feeding marks or movement.. + try to clean you plant shelves regularly and remove all fallen leaves.
sorry for a long post.. I guess it sums up my own experience as another "newbie dealing with thrips".. Maybe it will help someone to start seeing them sooner..