How to control pests mechanically?

Pest control can be done mechanically by using light traps and destruction of trapped insects. Ropes are used for dislodging leaf feeding larvae e.g. caseworm and leaf folders. Pheromones are used for mating disruption and mass trapping. Removal and destruction of egg masses, larvae, pupae and adults of insect pests and diseased parts of plants wherever possible. Bird perches are installed in the field for birds to sit and feed on insects and their immature stages.