Aphids and white flies are effectively controlled by

Answer: Option D

Aphids and white flies are effectively controlled by Systemic insecticide.
A Systemic fungicide is taken up by a plant and is then translocated within the plant system, it can there by protect the plant from infections and restrict/Control the further growth of existing infungal infections.
The soil-applied systemic insecticide imidacloprid can control whitefly nymphs.