Abstract
Two tobacco fields were treated throughout the growing season with a blend of three aldehydes and one alcohol, components of the sex pheromone of the tobacco budworm, Heliothis virescens (F.). Captures of tobacco budworm males in pheromonebaited cone traps were greatly reduced in the pheromone-treated fields compared with the control field under conventional insecticide treatment. Moreover, mating of laboratory-reared females confined on mating tables in the pheromone-treated fields was reduced 88 to 98%. However, it was necessary to spray the pheromone-treated fields to control the tobacco hornworm, Manduca sexta (L.), and green stink bug, Acrosternum hilare (Say). Because these insecticide treatments also killed tobacco budworm larvae, it was impossible to assess the full impact of the pheromone treatment on control of this species. Nevertheless, these results indicate that the air permeation technique will not be adaptable for control of the tobacco budworm in tobacco until similar remedies are available for control of the tobacco hornworm and possibly other pest species.
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