Developing a new form of ecological pest control, researchers engineer crops to produce the pheromones of the pest. The crops now produce the pest pheromone, overwhelming the fields and causing the male pests to fail to find a mate. This new form of ecological pest control combines:
(a) natural enemies and cultural control.
(b) cultural and natural enemies control.
(c) genetic and cultural control.
(d) genetic and natural chemical control.
