Usually yellowish white; wings tightly held
against body, giving a cylindrical
appearance; forewing with one vein,
bent slightly mesad at about 2/3 of wing,
no distinct ridge or trace of fork.
(sweetpotato or silverleaf whitefly)
Usually bright white; wings loosely held
against body, giving a much broader
appearance; forewing with one distinct
vein, bent slightly mesad at about middle
of wing, and a short distinct ridge forming
a fork with the vein. (greenhouse whitefly)