Microbes can be used to decrease use of chemical fertilisers and pesticides. Explain how this can be accomplished.

Biopesticides and bioinsecticides are the living organisms that specifically inhibit the growth of pest and insects e.g., Bacillus thuringiensis (Bt) is a gram-positive bacterium that produces crystal proteins which are potent and highly specific insecticides. Trichoderma harzianum is a bio-fungicide and is used for suppression of various disease-causing fungal pathogens. Biofertilizers are the microorganisms which increase the nutrient availability from soil to plants thereby causing nutrient enrichment, for example, free-living and symbiotic nitrogen fixing bacteria and Cyanobacteria.