A pheromone bait comprises a cord, an insect attractant and a protective layer. The rope body has both end faces and an outer peripheral face connected between the both end faces. The insecticide contains pheromones and is attached to the rope. The protective layer is coated on the outer peripheral surface of the rope body. A trap device includes a casing, a cover and a trap unit. The outer casing comprises a base wall and a surrounding wall, the base wall and the surrounding wall jointly define a trapping space, and the surrounding wall boundary has a plurality of trapping passages communicating with the trapping space. The cover includes a receptacle that communicates with the trapping space. The trap unit includes a mounting member disposed in the jack and a pheromone bait disposed on the mounting member and located in the trap space.一種費洛蒙誘餌包含一繩體、一誘蟲劑及一防護層。繩體具有兩端面及一連接在兩端面之間的外周面。誘蟲劑含有費洛蒙並附著於繩體。防護層包覆於繩體的外周面上。一誘蟲裝置包含一外殼、一封蓋及一誘蟲單元。外殼包括一基壁及一圍壁，基壁與圍壁共同界定出一誘蟲空間，且圍壁界具有多個與誘蟲空間相連通的誘蟲通道。封蓋包括一與誘蟲空間相連通的插孔。誘蟲單元包括一穿設於插孔的安裝件及費洛蒙誘餌，該費洛蒙誘餌設置於該安裝件且位於該誘蟲空間中。
