Weeds are one of the biggest challenges in wheat farming. During the first 40–45 days after sowing, wheat grows slowly, while weeds grow much faster. If weeds are not controlled on time, they compete with the crop for water, sunlight, and nutrients. This reduces tillering, weakens the plants, and lowers yield. To manage weeds effectively, farmers often use weedicides (herbicides) in addition to manual weeding. Different weedicides are used depending on the type of weeds present in the field.
In wheat, weeds are mainly of two types—broadleaf weeds and narrow-leaf or grassy weeds. Some common grassy weeds are Phalaris minor (gulli danda) and wild oats, while broadleaf weeds include Chenopodium (bathua), Melilotus (senji), and Lathyrus. Since different weeds require different herbicides, choosing the right one is important.
One commonly used pre-emergence weedicide is Pendimethalin. It is applied within 1–3 days after sowing but before the weeds germinate. Pendimethalin forms a protective layer on the soil surface and stops weed seeds from sprouting. It is especially useful for controlling both grassy and broadleaf weeds in the early days. It should be sprayed on moist soil for best results.
For post-emergence control, several weedicides are available. Clodinafop is a widely used herbicide for controlling grassy weeds like Phalaris minor. It is applied around 30–35 days after sowing when the weeds are young and actively growing. Another popular product is Fenoxaprop, which also targets grassy weeds effectively. These weedicides are selective and do not harm the wheat crop when used at the correct dose.
To control broadleaf weeds, farmers often use 2,4-D, a well-known herbicide applied after the crop has reached the 3–4 leaf stage. It controls a wide range of broadleaf weeds but must be used carefully to avoid drift to nearby crops. Another option for broadleaf weeds is Metsulfuron-methyl, which is effective at very low doses and provides good control of common broadleaf species in wheat fields.
In many wheat-growing regions, mixed weed infestation is a problem. For such fields, combination herbicides are useful. Products containing Clodinafop + Metsulfuron or Sulfosulfuron + Metsulfuron help control both grassy and broadleaf weeds with a single spray. These combinations save labour, reduce spraying time, and provide broad-spectrum control.
To get the best results from weedicides, farmers must follow proper spraying practices. The soil should have enough moisture, the sprayer must be clean, and the correct nozzle should be used for uniform coverage. Spraying on windy days should be avoided to prevent drift. It is also important to apply the weedicide at the recommended crop and weed growth stage.
Farmers should remember that overuse or misuse of herbicides can lead to resistance in weeds. Rotating herbicides and combining chemical control with cultural practices like timely sowing, proper seedbed preparation, and crop rotation helps maintain effectiveness.
In simple words, weedicides commonly used in wheat include Pendimethalin (pre-emergence), Clodinafop and Fenoxaprop (for grassy weeds), 2,4-D and Metsulfuron (for broadleaf weeds), and combination herbicides for mixed weed problems. By selecting the right weedicide and applying it correctly, farmers can keep their wheat fields weed-free and ensure better growth and higher yields.
