The selection and use of herbicides in celery fields is an important step in the process of celery cultivation, which directly affects the control effect of weeds and the growth safety of celery. The following is a detailed analysis of herbicides in celery fields: 1. Common weeds in celery fields
Celery fields are prone to weed hazards such as sedge, purslane, horsetail, and wild amaranth, especially in open field cultivation of celery and nursery areas. These weeds will compete with celery for nutrients, water, and light, seriously affecting the growth and yield of celery. 2、 Selection of herbicides
When choosing herbicides for celery fields, the following points should be considered:
1. Safety: Ensure that herbicides are safe for celery and will not cause harm.
2. Effectiveness: It can effectively prevent and control weeds in celery fields.
3. Residue issue: Avoid using herbicides with long residue periods to avoid affecting the quality of celery and subsequent crop cultivation.
Common herbicides used in celery fields include fluazuron, dexmedetomidine, herbicidal herbicide, and guar. These herbicides can be used by spray the soil or treating the stems and leaves. 3、 Usage of herbicides
1. Soil treatment: - Before celery sowing or seedling emergence after sowing, 100~150ml 48% trifluralin emulsifiable concentrate or 200ml 48% dexamethasone emulsifiable concentrate can be used per mu, spray the soil, and then mix the soil- You can also use 50g of 50% Liguron wettable powder plus 100ml of 48% dexamethasone emulsifiable concentrate (or 100-150g of 33% herbicide emulsifiable concentrate) per mu, and 50kg of water to spray the soil surface before sowing.
2. Stem and leaf treatment: - After the weeds are fully grown, appropriate stem and leaf treatment agent can be selected for spray. Pay attention to the fine droplets, and the spray should be even and thoughtful. 4、 Precautions
1. Timing of use: The best soil sealing treatment is to apply pesticides before sowing or after sowing and before emergence. Stem and leaf treatment should be applied after the weeds have fully grown.
2. Alternating use of herbicides: To avoid long-term use of a certain herbicide causing weeds to develop resistance, different types of herbicides should be used alternately.
3. Application conditions: Soil treatment requires flat bed surface, fine and moist soil; Stem and leaf treatment should be carried out on days with high temperatures, clear skies, and no wind.
4. Observe celery reaction: After using herbicides, closely monitor the growth of celery, and take timely measures to deal with any abnormal situations. 5、 Other suggestions
1. Physical weed control: In addition to the use of herbicides, comprehensive prevention and control can be achieved through manual removal or mechanical weed control.
2. Crop rotation fallow: A reasonable crop rotation fallow system can reduce the occurrence base of weeds and decrease the use of herbicides.
The selection and use of herbicides in celery fields should be comprehensively considered based on actual conditions to ensure effective weed control without causing adverse effects on celery growth.