- Some insects control the harmful insects and they are called friendly insects.
E.g : Spiders, Dragonfly, Krisopa etc.
- Trachoderma bacterium lives in the eggs of stemborer, tobacco caterpillar destroy the pests at the egg stage.
- Some bacteria like Bacillus Turengenisis destroy some pests.
- Mixed crops also control some pests and diseases.
- Hence natural pest control methods are useful to biodiversity because these methods destroys only the selected pests.
