Attracting agent and combined control method for ampullaria gigas in natural water body

The invention discloses an inducing agent for pomacea canaliculata in a natural water body and a combined control method. The inducing agent comprises the following steps: 1, preparing the inducing agent for the pomacea canaliculata in the natural water body; 2, a square area of 5 * 5 m is divided near the quay wall of the pomacea canaliculata egg mass in the water body, green smooth bamboo poles are selected, the bamboo poles are evenly coated with an inducing agent, the inducing agent is evenly distributed and inserted into the water in the square area, and the length, exposed out of the water surface, of the bamboo poles is kept to be 0.8-1 m; 3, preparing a loganin umbrella extracting solution for killing ampullaria gigas in a natural water body; and 4, 18 hours after the bamboo pole is inserted, uniformly scattering the loganin umbrella extracting solution into the regional water body, scattering the same dosage of extracting solution again every 24 hours, repeatedly scattering for three times, pulling o