Fremont, CA: Agrochemicals play a vital role in helping farmers boost their crop yields by controlling pests, diseases, and weeds. Only a small percentage of these substances successfully hit their intended targets during application. The excess can pollute the surrounding soil, air, and water, posing risks to beneficial organisms and ecosystems.
Soil
Nitrogen is a vital component of soil fertility and allows plants to develop. Bacteria produce nitrogen in the soil, making it productive. However, if agrochemicals run over from the plants into the soil, they can harm the bacterial community. This can impact the quantities of nitrogen and other minerals in the soil, rendering it unsuitable for plant development.
Earthworms, like bacteria, contribute significantly to the quality and fertility of the soil—they break down organic materials, converting them into natural manure for plants. Worms also play an essential role in soil structure by forming plant irrigation, drainage, and aeration channels. Pesticides, on the other hand, reduce the number of earthworms and disrupt this natural process. This can cause increased soil erosion and depletion, rendering the soil unsuitable for plant development.
Air
Pesticides can pollute our air and harm the health of humans, animals, and plants.Strong winds, when spraying, might cause agrochemicals to disperse and pollute neighboring surfaces. Aside from impacting human health in neighboring communities, it can harm ecosystems. Agrochemicals, which drift to neighboring plants, insects, and waterbodies, can expose critical pollinators such as bees, fruit flies, and certain beetles to pesticides by inhalation or ingestion. Over time, a lack of appropriate pollinator populations can cause the extinction of plant species.
Livestock, birds, and other animals can be exposed to agrochemicals in the air by inhalation, skin absorption, or swallowing contaminated plants or seeds. Although this exposure is seldom deadly to bigger animals, substantial quantities of pesticides can be discovered in cattle meat consumed by humans. Pesticides can also cause significant mortality rates among smaller animals such as birds. Birds and other predators, such as spiders, play a vital role in ecosystems because they help preserve the natural balance of insect populations by consuming them. As a result, a reduction in bird populations might lead to an increase in plant pests/insects and the extinction of some plant species.
Water
Pesticide residues can enter aquatic bodies through the air, inadvertent spilling, rain runoff from contaminated soil, or washing spraying equipment after use. Excessive pesticide usage can also contaminate groundwater with nitrate, a chemical molecule that, in high amounts, is toxic to humans and animals. Aside from the health effects of polluted water on animals, including cattle and people, pesticides have been directly related to fish death. Fish play a vital role in maritime environments because they feed other animals and birds. A fall in fish populations would significantly impact many creatures in food chains and webs.
