Name (also confusion method or mating disruption) for the biotechnology first developed in the 1940s for the environmentally friendly control of vine pests as part of plant protection. The method quickly caught on and has been widely used in viticulture since the 1980s. In this process, species-specific pheromones (sexual scents) that are only effective for certain insects are synthetically produced and applied in the vineyard. In nature, the males are attracted by the scent of the female. They still emit this substance, but it is lost in the cloud that is sprayed over a wide area. As a result, the males are confused, unable to follow a single trail, and mating with the females is prevented. The apt term "No sex for butterflies" was created for this. The unfertilized, sterile eggs are laid but do not produce larvae. Prior to widespread spraying, pheromone traps are used to determine the time and intensity of flight and thus the ideal time for control. These devices consist of a small container with the specific pheromone and a strip of glue. Depending on the number of males caught, the extrapolated range is determined.