Aprehend® starts working immediately upon spraying and remains effective for up to 3 months. Bed bugs that cross the spray barrier pick up conidia, which germinate within 24 hours, leading to death in 3-7 days. Those in harborages may also be infected, and all bed bugs should be eliminated within 3 months, assuming a typical infestation level. Complete eradication may take 4-8 weeks, depending on the infestation’s severity and bed bug activity.