Size
Usually less than 2 to 3 mm.
Identification
Minute soft-bodied insects that resemble tiny moths.
IFAS guide
Adults are winged and covered with white dust or waxy powder. Usually active.
Identification to genus or species usually requires close examination of pupa (inactive last nymphal stage).
Life Cycle
First instar larvae are active, subsequent instars are sessile and look like scales.
Internet References
Whitefly Pupae of the World (keys, host lists, references)