Pesticide toxicity in India must be assessed through the hazards of the chemicals used as well as their quantity. A study published in Science in February 2026 found that rising applied toxicity was working against international ambitions to reduce pesticide risks to biodiversity. India, Brazil, China and the United States were major contributors within the study’s assessment.
The research examined 2013–2019, not pesticide use during 2026. This distinction prevents an older observation period from being presented as a real-time national ranking.
What did the study investigate?
The research team assessed 625 pesticides using toxicity information drawn from seven regulatory systems and covering eight groups of organisms. Applied toxicity increased for most groups during the study period; aquatic plants and terrestrial vertebrates were the exceptions showing declines.
The result concerns potential pressure on organisms exposed to pesticides. It does not mean researchers counted all insects, birds or fish killed across each country. National contributions also reflect cultivated area, crop choices and patterns of chemical use, so they cannot be interpreted as a simple ranking of individual farmers’ behaviour.
Total Applied Toxicity: the central idea
Total Applied Toxicity, or TAT, combines the mass of pesticide applied with its toxicity to a specified organism group. Conceptually, the calculation weights applied amounts using toxicity thresholds: an ingredient that produces effects at a lower concentration can carry greater weight.
Consequently, substituting a highly potent chemical for a less potent one may reduce tonnes used without producing a corresponding reduction in the indicator. A hypothetical switch from ten units of a relatively low-potency substance to one unit of a much more potent substance illustrates why weight alone is insufficient.
Aggregated indicators can combine information across organism groups, but their interpretation depends on the chosen endpoints, weighting and available data. They remain analytical tools, not direct measurements of damage at every farm.
| Measure | Question answered | Important limit |
|---|---|---|
| Pesticide mass | How much active ingredient was used? | Does not account for different toxicities |
| Applied toxicity | How do quantity and toxic potency combine? | Does not fully describe actual field exposure |
| Residue monitoring | What concentration is detected in a sampled medium? | Depends on sampling place and time |
| Biodiversity monitoring | How are species or communities changing? | Changes can have several interacting causes |
What Target 7 requires
Target 7 of the Kunming–Montreal Global Biodiversity Framework calls for reducing the overall risk from pesticides and highly hazardous chemicals by at least half by 2030. It explicitly connects this ambition with integrated pest management, scientific evidence, food security and livelihoods.
The target is therefore about risk reduction; it is not simply a direction to halve pesticide tonnage. Nor does the global target itself specify a uniform chemical substitution for every Indian crop. National implementation needs evidence about local pests, exposure pathways and workable alternatives.
How integrated pest management changes the response
FAO describes integrated pest management as combining suitable biological, cultural, physical and chemical measures. Its starting point is a healthy crop and an understanding of the agricultural ecosystem, including organisms that naturally control pests.
Monitoring pest populations helps distinguish a developing problem from an automatic calendar-based reason to spray. Crop rotations, appropriate crop practices and protection of beneficial organisms can reduce dependence on repeated chemical interventions. Where pesticides are necessary, their selection and use should follow applicable registration conditions and qualified advice.
This approach should not be confused with abandoning crop protection. Farmers need reliable alternatives and timely support; asking them to accept avoidable crop losses would undermine both food production and adoption of better practices.
What India should measure and improve
A useful district programme would connect ingredient-level sales and use records with crop information, extension advice and environmental monitoring. Procurement totals alone cannot reveal whether a change improves conditions for pollinators or reduces contamination in nearby water bodies.
Implementation should also separate three responsibilities: regulators assess permitted uses, extension systems help farmers manage pests, and independent monitoring checks results. A successful intervention would document both effective crop protection and lower harmful exposure, while recording costs borne by farmers.
For example, if an alternative controls a pest but destroys its natural predators, its immediate success may conceal a longer-term problem. Evaluation should therefore cover several seasons. The wider soil and farming context is discussed in India’s soil nutrient challenges.
Frequently asked questions
1. Does lower pesticide consumption always mean lower toxicity?
No. The active ingredients, their potency, exposed organisms and actual exposure conditions all matter.
2. What is the main UPSC distinction?
Distinguish chemical quantity, toxic hazard, environmental exposure and observed ecological impact before evaluating a pesticide policy.
