A method and a device for selectively collecting a first kind of matter, material, or organism from plants and on plant life by exposing the plant life to an air current flowing between a blower outlet and a suction hood. Stimulus signals are directed toward the plant life such that the signals influence a second kind of matter, material organism to leave the plants and/or the second kind of matter, matter or organism is retarded from gathering on the plant life. In this way, the second kind of matter, material or organism is not exposed to the collecting air current.
