Biopesticides vs Chemical Pesticides: Sustainable Growth vs Quick Gains

Biopesticides are any living substances (e.g. microbes) or naturally derived chemical compounds (e.g. plant/microbial extracts, nanoparticles of biological origin) that are eco-friendly and pose low toxicity compared to synthetic chemical pesticides¹.

Below are the primary differences between biopesticides or biocontrol agents and synthetic chemical compounds:

Aspect	Biopesticides	Chemical Pesticides
Definition	Naturally derived (plants, bacteria, fungi, minerals) and target specific pests.	Synthetic chemicals designed to kill or inhibit pests.
Mechanism of Action	Often work by disrupting specific biological processes in pests or by enhancing plant defences.	Typically act by directly poisoning or disrupting vital functions in pests.
Target Specificity	Highly specific, targeting specific pests or pest groups with minimal effect on non-target species.	Broad-spectrum; may harm beneficial insects, plants, animals, and microorganisms.
Environmental Impact	Generally low, as they are biodegradable and don’t persist in the environment.	Often persistent, accumulating in soil, water, and non-target organisms, leading to pollution.
Safety for Humans	Usually safe, with low toxicity for humans; however, specific biopesticides need safety handling.	Can be toxic to humans; exposure may cause acute or chronic health effects.
Impact on Soil Health	Can promote soil health by preserving beneficial organisms and microbial diversity.	May degrade soil quality by harming beneficial soil organisms and causing nutrient imbalances.
Residue Persistence	Short-lived with minimal residues, reducing the risk of contamination in crops and water bodies.	Often leaves residues that may remain on crops and in the environment for extended periods.
Resistance Development	Low potential for pests to develop resistance due to specific modes of action.	High potential for resistance, as pests adapt to chemical exposure over time.
Regulatory Approvals	Subject to regulatory assessment but often fast-tracked due to eco-friendliness.	Heavily regulated, with stringent testing due to toxicity and environmental impact concerns.
Cost of Development	Generally lower due to natural sourcing and simpler regulatory processes.	High cost due to extensive testing, regulatory requirements, and synthetic formulation.
Compatibility with IPM	Highly compatible with Integrated Pest Management (IPM) systems, enhancing sustainable pest control.	Can be incompatible with IPM, often causing an imbalance in pest-predator relationships.
Effect on Biodiversity	Encourages biodiversity by preserving beneficial organisms, insects, and soil microbiomes.	May reduce biodiversity by affecting non-target species, disrupting ecosystems.
Application Frequency	May require frequent application due to lower residual effect, depending on environmental conditions.	Less frequent application needed due to lasting potency but may lead to over-reliance.
Cost to Farmers	Initial costs can be lower, with potential for local, sustainable sourcing; some may be more affordable in long-term use.	Often high cost; long-term use can be expensive due to cumulative application needs.
Pest Outbreak Control	Takes time to observe visible effects, especially while using microbes.	Could show immediate effect with death of pests, literally within hours of application.
Action Plan	Works better as a preventive measure than curative action.	Effective for curative measures, but also applicable for prevention
Business Incentive	Naturally occurring microbes without any genetic modification cannot be patented, exception being natural compounds².	Synthetic chemical compounds can be patented.
Example Products	Bacillus thuringiensis (Bt), neem oil, Trichoderma spp., pheromone traps, microbial consortia.	Glyphosate, chlorpyrifos, carbofuran, pyrethroids, and various organophosphates.

References:

1. Ayilara MS, Adeleke BS, Akinola SA, et al. Biopesticides as a promising alternative to synthetic pesticides: A case for microbial pesticides, phytopesticides, and nanobiopesticides. Front Microbiol. 2023;14. doi:10.3389/fmicb.2023.1040901
2. Cameotra SS. Can microbes be patented. Biochem Biophys. Res. Comms. 2013 Jan 4;430:448.