Identification Correct identification of whiteflies is essential for choosing effective management methods. Whiteflies usually occur in groups on the underside of leaves. Adults have yellowish bodies and whitish wings. Monitoring Inspect the underside of shriveled and yellow foliage and nearby healthy leaves for whiteflies. If the plant is heavily infested, simply brushing an infested plant with one's hand will send out a white cloud of these insects.
Most species prefer to feed on new plant growth.
The immatures are found on the undersides of lower leaves. Whitefly species are most reliably identified by examining the late fourth immature stages. Yellow sticky traps are useful for detecting the presence of adult whiteflies and for estimating seasonal changes in their abundance and the timing of treatments. Damage Whiteflies can cause wilting, yellowing, and loss of leaves, or stunting. The honeydew excreted by the immatures collects dust and leads to sooty mold growth.