Neem oil, citrus oil, and eucalyptus oil are some examples of natural pesticides.
Top soil is covered with wet mulch to prevent weed growth. This process is called mulching.
The cry gene is introduced in cotton plant (Bt cotton) which produces Cry toxins which kills the cotton bollworm when it ingests it.
Sterile Insect Technique is a method in which sterile male pests are introduced on the crop which compete with wild male pests to mate with females resulting in pest control.