creatures on bromeliad
BROMELIAD I acquired recently has what appear to be small black
scales on the undersides of the lower leaves. Are they scales and
if so what should I do about them?
they do look like tiny scale insects, these black spots on the sample
you sent are actually the excretions of small flies known as cecids
and phorids. While they don't harm plants, these flies seem to like
to occasionally deposit their droppings on them.
You can remove the spots
by simply washing them off with soapy water or just scraping them
with your fingernails.
Cecid and phorid flies
tend to breed in damp shady parts of the garden. They're not a pest
of plants apart from the occasional deposit on the leaves - I've
even known them to leave their marks on plastic pots and walls of
Gardener, Issue 162, 2005, Page 24
Reproduced with permission from the former Weekend Gardener magazine. The views expressed here are not necessarily those of the RNZIH.