Other Symptoms Leaves have a black fungus on them . This is probably Sooty Mold , which finds a host in the honeydew left by Whiteflies and other insects. When Sooty Mold is present, the upperside of the leaves will be covered with tiny, dark speckles. Leaves pale . They appear yellow or grayish in color.
Plant growth is slow .
Treatment Spray with Acephate every two to three days until no more Whiteflies are present. When spraying, it is crucial to treat the undersides of the leaves where Whiteflies tend to cluster. Be sure to spray all of your Violets, not just those where symptoms have been spotted. Whiteflies spread quickly, so if even one Violet has them, all are at risk. Acephate is available in a number of all-purpose, household insect sprays.