Herbicide
Herbicides are chemical substances used to control, suppress, or kill unwanted plants, commonly known as weeds. They are a crucial part of modern agriculture and landscape pest management.
History
The use of herbicides has a long history, dating back to the ancient Romans and Greeks who used certain plants to suppress the growth of weeds in their crops. The modern era of herbicides began in the early 20th century with the discovery of synthetic organic herbicides.
Types of Herbicides
Herbicides can be classified into two main types: selective and non-selective. Selective herbicides are designed to kill specific types of plants, while non-selective herbicides kill all plants they come into contact with.
Mode of Action
Herbicides work by disrupting a specific process essential to the plant's growth. The mode of action can be grouped into several categories, including growth regulators, amino acid synthesis inhibitors, photosynthesis inhibitors, and others.
Environmental Impact
While herbicides have greatly increased agricultural productivity, their use has also raised concerns about their impact on the environment and human health. Some herbicides can persist in the environment for long periods, potentially contaminating soil and water.
Safety and Regulation
The use of herbicides is regulated by various national and international agencies to ensure their safe use. These regulations cover aspects such as the approval of new herbicides, their application, and the maximum residue levels allowed in food.
See Also
References
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