Phalaris minor is a troublesome weed that affects winter wheat crops and can significantly impact crop yield and quality. It is important to control phalaris minor after the first irrigation to prevent it from spreading and causing further damage to the crop. Here are some effective ways to control phalaris minor in wheat after the first irrigation:
1. Herbicides: Herbicides are the most commonly used method to control phalaris minor in wheat. Post-emergent herbicides such as sulfosulfuron, fenoxaprop-p-ethyl, and clodinafop-propargyl are effective in controlling phalaris minor. These herbicides should be applied after the first irrigation when the wheat crop is at the 3-4 leaf stage. It is important to follow the herbicide label instructions and use them judiciously to prevent any damage to the crop.
2. Crop Rotation: Crop rotation is another effective way to control phalaris minor. Growing alternate crops such as legumes or oilseeds in between wheat crops can help break the life cycle of phalaris minor. This will also improve soil health and reduce the weed seed bank in the soil.
3. Cultural Practices: Cultural practices such as crop density, row spacing, and fertilizer management can also help in controlling phalaris minor. High-density wheat crops with narrow row spacing can provide good crop competition and suppress the growth of phalaris minor. Proper fertilization with balanced nutrients can also help the wheat crop grow vigorously and outcompete the weed.
4. Manual Control: In cases of severe phalaris minor infestation, manual control may be required. The weed can be removed by hand or using a hoe before it matures and produces seeds. This should be done carefully to prevent any damage to the wheat crop.
In conclusion, controlling phalaris minor after the first irrigation is crucial to prevent it from causing further damage. A combination of chemical, cultural, and manual methods can help in effective control of phalaris minor in wheat. It is important to take a comprehensive approach to weed management to ensure a healthy and productive wheat crop.