Crop protection chemicals broadly referred to as pesticides, are a vital class of chemical substances used in agriculture to safeguard crops from various threats that can significantly reduce yield and quality. These threats primarily include weeds, insect pests, and plant diseases caused by fungi, bacteria, and viruses. The main categories of crop protection chemicals include herbicides, which are used to control unwanted plants (weeds) that compete with crops for sunlight, water, nutrients, and space. Insecticides are designed to kill or repel insect pests that feed on or damage crops. Fungicides/Bactericides are employed to prevent or control plant diseases caused by fungi and bacteria. According to the Food and Agriculture Organization (FAO), the total global use of pesticides in agriculture was approximately 3.70 million tonnes of active ingredients in the year 2022. This represents a 4% increase compared to 2021. The global average usage of crop protection chemicals reached 117.9 kg per hectare in 2022. Fungicides had the highest per-hectare consumption at 48.4 kg, followed by herbicides at 44.8 kg per hectare in the same year. However, the overall consumption of pesticides in India for recent years, from 2018-2019 to 2023-2024, shows fluctuations, with a decline or stagnation from this peak. Consumption fell in 2018-2019 and again in 2022-2023 to 53.63 tonnes, despite some recovery in 2019-2020 at 61.7 tonnes and 2020-2021 at 62.19 tonnes (source: Indiastat). Nearly seven percent of the cost was spent on crop protection chemicals (Balaji et al., 2018). Additionally, a study by Janaki Rani et al. revealed a similar decline in the consumption pattern of pesticides among farmers in India. The latest data for 2023-2024 indicates consumption at 55.24 tonnes, which is below the recent peak levels shown in Figure 1. Overall, while there have been periods of growth, total pesticide consumption has not consistently increased throughout the entire observation period, with recent figures lower than the highest levels reached. The average consumption over the 24 years is about 52.07 tonnes. The consumption pattern in Tamil Nadu over this decade shows significant volatility. It's not a consistent upward or downward trend, but rather a pattern of stability followed by a decline, a strong recovery, and then another period of decline and slight recovery, as shown in Figure 2. The consumption in 2023-2024 (1970 tonnes) is lower than the initial figures (around 2096 tonnes) and significantly below the peak of 2225 tonnes in 2019-2020 (Janaki Rani et.al., 2025). This indicates a general stagnation or slight decline in recent years compared to the start of this specific period. These fluctuations indicate that the consumption of crop protection chemicals will vary among farmers over the specified period.


