WHITEFLIES
Q-biotype
|
GREENHOUSE WHITEFLY |
 |
Adult |
 |
Eggs |
 |
Scales |
| The greenhouse whitefly is an important and most persistent pest of many
ornamentals, particularly poinsettia, as well as bedding plants such as
ageratum, fuchsia and salvia. However, this pest is of only occasional
importance on tropical foliage plants, unless they are grown in accompaniment
with a major whitefly host. Adults are white and are the most easily detected
stage as they fly when disturbed, quickly settling again on lower leaf surfaces
of the newly expanded foliage. Infestations can begin by introduction of
infested plants or migration of adults from other crops or weed hosts either
inside or outside of the greenhouse. Once again, the growth of sooty molds will
accompany and follow an infestation. Seriously affected foliage becomes
chlorotic and wilted. |
SILVERLEAF or
SWEETPOTATO WHITEFLY |
 |
Adult |
 |
Scales |
 |
| Damage to ivy from scales feeding on older leaves below
this leaf on the same stem. |
 |
| Damage to Mandevilla from scales feeding on older leaves
below this leaf on the same stem. |
 |
Adult |
 |
Adults on Hibiscus |
 |
Egg spiral on Hibiscus. |
  |
| The immature stages or scales of this whitefly make a waxy
material that hangs from the infested leaves. This material is often
called a "beard" and can be as long as 6 inches. |
Copyright © 2000 [University of Florida, MREC]. All rights reserved.
Revised:
May 19, 2009
.
|
