Over the years, the use of chemical pesticides in Nepal has increased so notably that it has raised serious concerns about human health and environmental sustainability. From residues in the food we eat to the degradation of soil health and biodiversity loss, the long-term consequences of excessive pesticide use are becoming harder to ignore. In Nepal, where agriculture remains the primary livelihood for around 60 percent of the population, the dependence on synthetic chemicals is not just a farming issue; it is a public health and environmental crisis in the making. 

Climate change has led to the emergence of new pests and the expansion of pest habitats, causing farmers to rely more heavily on chemical pesticides to protect their crops. While effective in the short term, the widespread and often unregulated use of synthetic pesticides triggers long-term consequences. These include the development of pest resistance, contamination of soil and water resources, accumulation of toxic residues in food, and alarming impacts on human health and biodiversity. Children, pregnant women, and farm workers are particularly vulnerable to pesticide exposure, with studies linking prolonged contact to respiratory issues, hormonal disruptions, and even cancer. 

Recent studies have shown that vegetables in Nepal often contain pesticide residues exceeding the maximum residue limits (MRLs), rendering them unsafe for human consumption. 

The increasing import of chemical pesticides over recent years highlight Nepal's growing reliance on synthetic pest control measures. As in the fiscal year 2023/24 alone, the country imported 1,664 active ingredient (a.i.) tons of chemical pesticides (PQPMC, 2024). The rising trend reflects an urgent need to question the sustainability and safety of our current pest management practices. 

In the face of these growing challenges, biopesticides present a promising and necessary alternative. Derived from natural organisms or substances like bacteria, fungi, viruses, and botanical extracts, biopesticides control pests without causing harm to the environment, human health, or beneficial organisms. Unlike synthetic pesticides, they are biodegradable, target-specific, and less likely to cause pest resistance. 

Common examples of biopesticides include Bacillus thuringiensis (Bt), which controls caterpillars; neem-based formulations for a broad spectrum of pests; Trichoderma species that act against fungal pathogens; and Jholmal, a locally prepared bio-mixture made from cow/buffalo urine, dung, botanicals, and beneficial microorganisms for pest and disease management, and is currently being promoted in Nepal. These eco-friendly options not only help protect crops effectively but also support soil health, pollinator survival, and long-term agricultural sustainability. 

Biopesticides are no longer just something used by the organic farmers as a choice; they are now essential for mainstream agriculture, especially in the face of climate and health challenges. As climate change continues to alter pest dynamics, and as chemical residues threaten public health, a shift toward safer alternatives is not just desirable but urgent. The adoption of biopesticides supports multiple Sustainable Development Goals (SDGs), including SDG 2 (Zero Hunger), SDG 3 (Good Health and Well-being), SDG 12 (Responsible Consumption and Production), SDG 15 (Life on Land) and SDG 13 (Climate Action). Nepal’s smallholder farmers, who are already facing the brunt of climate impacts, can benefit from locally available and low-cost biopesticide options like Jholmal, which enhance both resilience and productivity. 

Despite their proven benefits, the widespread adoption of biopesticides in Nepal faces several challenges. A major barrier is the lack of awareness and technical knowledge among farmers, many of whom are unfamiliar with how biopesticides work, how to apply them effectively, or how they differ from conventional pesticides. In addition, biopesticides are often not readily available in rural markets, and when they are, they tend to be more expensive or perceived as less effective due to slower action. Limited private sector involvement and insufficient government incentives have also contributed to a weak supply chain and low investment in local production. Without strong institutional support and market linkages, the transition from chemical to biological pest management remains slow and fragmented. 

To accelerate the transition toward sustainable pest management, a coordinated and multi-stakeholder approach is essential. First, government policies should actively promote biopesticides by including them in subsidy schemes. Investment in research and local production of bio-based inputs should be prioritized, enabling farmers to access affordable and effective products tailored to Nepal’s diverse agroecological zones. Extension services must be reoriented to include biopesticide training through farmer field schools, demonstration plots, and digital platforms. The private sector, too, has a critical role to play in developing, distributing, and marketing biopesticides, especially when incentivized through public–private partnerships. Finally, awareness campaigns targeting farmers, consumers, and policymakers can help shift perceptions and generate demand for safe, sustainable pest control solutions.

The overuse of chemical pesticides is not just an agricultural concern; it is a public health, environmental, and sustainability crisis. Thus, biopesticides offer a safer and more sustainable way to manage pests without damaging our soil, food, or ecosystems. If we want safe food and a clean environment, we must act now. With the right support from the government, private sector, and awareness among farmers and consumers, biopesticides can become a powerful solution against pest management.  The future of farming lies not in fighting nature, but working with it. By adopting biopesticides today, Nepal can cultivate a healthier tomorrow; for its land, its farmers, and its people.

 

Table

Annual import of chemical pesticides in Nepal over the years

Source: PQPMC, 2024