To effectively manage weeds in wheat fields, it's essential to consider the growth stage of the wheat seedlings and the type of growing medium. Different herbicides should be selected based on these factors to ensure optimal weed control without harming the crop. Below are several herbicide options available for use:
1. **6.9% Hummer Gel Suspension or 10% PUMA Cream**
These products are effective against a wide range of monocot weeds. For each mu (approximately 667 square meters), apply 40–80 ml of the 6.9% gel suspension or 30–50 ml of the 10% cream, mixed with 30 kg of water. The best time to apply is during the 3- to 5-leaf stage of wheat growth.
2. **Baijia Mixture**
This combination is ideal for controlling broad-leaved weeds, especially difficult ones like swinecress and spring bristle. Mix 10–12 ml of 48% Bacillus per acre with 125–150 ml of 20% 2,4-D amine solution, then spray with 30 kg of water. Apply this mixture between the 3rd leaf stage and before the stem elongation. It’s only suitable for crops that will later be planted with rice.
3. **75% Superstar Dry Suspension**
This product is effective against a variety of broad-leaved weeds. Use 1–2 grams per mu, diluted in 30 kg of water. Apply it during the 3- to 5-leaf stage of wheat development.
4. **20% Make It Prolonged EC**
This formulation controls a wide range of broad-leaved weeds, including those that are hard to eliminate. Apply 60–100 ml per mu, mixed with 20 kg of water. It is most effective when applied during the 3- to 5-leaf stage of wheat.
5. **Toluene Mixture**
This blend is also useful for controlling broad-leaved weeds. Mix 125 ml of 20% 2,4-D amine with 100 ml of 48% Bentazon, then spray with 30 kg of water. It is best applied after the jointing stage of wheat. Like the Baijia mixture, it should only be used on crops that will later be followed by rice.
To maximize the effectiveness of these herbicides, certain environmental conditions must be considered. First, check the soil moisture level—water the field if necessary before application, and avoid spraying when the soil is too dry. Second, choose sunny days for better absorption. Third, apply the herbicides when the temperature is around 20°C. Finally, avoid windy conditions to prevent drift and damage to nearby crops. By following these guidelines, farmers can achieve better weed control while protecting their wheat crops.
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