The invention relates to novel \u03941-pyrrolines of the formula in which R1, R2, R3, m, and Q have the meanings given in the disclosure, to a plurality of processes for preparing these substances, and to their use for controlling pests. The connection by the connecting elements is selectively made, thus making it possible to control radiation directivity of an electromagnetic field formed by the first and second conductive layers. Described is also a method for detecting containers moving along a feed path of a conveyor, comprising the operating steps of providing a sensor and moving it from an initial position to a final position in a way which is synchronized with the movement of a container.