A single application on May 2, 1988 of a nuclear polyhedrosis virus formulated in water, in a dust bait, or in an aqueous 10% crude cottonseed oil to wild geranium in field cages resulted in reductions in adult Heliothis emergence during June ranging from 80.8 - 91.3% compared to the untreated control in field cages. A treatment containing a mixture of the bacterium, Bacillus thuringiensis Berliner, and an insect growth regulator significantly reduced the emerging population (49.1% reduction compared to the control) but was significantly less effective than any virus treatment (P=O.05).