Weedicides are chemicals, like 2,4-D, used to control weeds. They are diluted with water and sprayed in fields during the vegetative growth of weeds, ensuring minimal impact on crops.
NCERT Class 8 Science
Chapter 1 Crop Production and Management
What are weedicides, and how are they used to control weeds?
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Weedicides, also known as herbicides, are chemical substances designed to control or eliminate unwanted plants, commonly referred to as weeds. These chemicals may be selective, targeting specific types of weeds, or non-selective, affecting a broad range of plants. Weedicides interfere with essential plant processes, such as photosynthesis or growth hormone synthesis, leading to weed suppression or death. Farmers apply weedicides through spraying or spreading on fields. Proper application timing is crucial to maximize effectiveness and minimize environmental impact. While weedicides offer efficient weed control, sustainable farming practices emphasize their judicious use to mitigate potential ecological and health concerns.