**Weeds**

Weeds are unwanted and undesired plants that grow in gardens, lawns, and agricultural fields. These plants compete with desired plants for nutrients, sunlight, and space, thereby reducing the overall productivity and aesthetic value of the area. Weeds have the ability to spread rapidly and dominate an area if left uncontrolled. They can be found in various forms, such as broadleaf plants, grasses, vines, or even woody plants. It is important to manage and control weeds to maintain the health and productivity of gardens, lawns, and crops.

**Weedicides**

Weedicides, also known as herbicides, are chemical substances used to control and eliminate weeds. They are designed to specifically target unwanted plants while minimizing harm to desired plants. There are various types of weedicides available in the market, each with its own mode of action and effectiveness against different types of weeds. Here, we will discuss two commonly used weedicides:

1. **Glyphosate**: Glyphosate is a broad-spectrum, non-selective systemic herbicide. It is one of the most widely used weedicides globally. Glyphosate works by inhibiting an enzyme essential for plant growth, preventing the production of certain amino acids. This leads to the death of weeds as they are unable to grow and reproduce. It is effective against a wide range of weeds, including both annual and perennial plants. Glyphosate is usually applied as a spray directly onto the foliage of the weeds. However, it is important to note that glyphosate can also harm desirable plants if not used with caution.

2. **2,4-D**: 2,4-Dichlorophenoxyacetic acid, commonly known as 2,4-D, is a selective systemic herbicide. It is widely used for controlling broadleaf weeds in various settings, including lawns, pastures, and agricultural fields. Unlike glyphosate, 2,4-D is designed to target broadleaf plants while sparing grasses. It mimics a plant hormone called auxin, causing uncontrolled growth and eventually leading to the death of susceptible broadleaf weeds. 2,4-D is available in various formulations, including liquids and granules, and can be applied as a spray or as a soil treatment. It is important to follow the instructions and safety precautions when using 2,4-D to minimize any potential harm to humans, animals, or non-target plants.

In conclusion, weeds are unwanted plants that compete with desired plants for resources and can negatively impact the health and productivity of gardens, lawns, and agricultural fields. Weedicides, such as glyphosate and 2,4-D, are chemical substances used to control and eliminate weeds. Glyphosate is a non-selective herbicide effective against a wide range of weeds, while 2,4-D is a selective herbicide targeting broadleaf plants while sparing grasses. It is important to carefully choose and use weedicides to ensure effective weed control while minimizing harm to desirable plants and the environment.

The unwanted plants which grow along with a cultivated crop are called weeds.
Some weedicides are MCPA and  2,4-D