This film shows a number of pests in close-up in the laboratory - the Cottony Cushion Scale, the Cabbage Moth, the Cabbage White Butterfly, the Green Vegetable Bug, and the Vegetable Weevil. After outlining the success with which they have been controlled by their natural enemies, the film explores the entomologist''s search for a wasp to control the Queensland Fruit Fly.
An example of the use of virus diseases as another biological control measure is also shown.
Produced in 1960.