Sugar beet is highly sensitive in its early growth stages.
- Sensitive to drought.
- Vulnerable to diseases and pests.
- And most importantly, extremely sensitive to weeds.
Why is weed control crucial?
Uncontrolled weeds in the first 10 days after emergence can reduce yield by up to 20%.
Common Weeds in Sugar Beet Fields
- Broadleaf weeds: These are widespread and include chard, mallow, montana, and fireweed.
- Nutsedge (Cyperus rotundus): One of the most aggressive and damaging weeds in sugar beet.
- Grassy weeds: Such as Bermuda grass and jungle rice.
Effective Weed Control Strategies
There are three key factors for successful weed management:
- Choosing the right herbicide.
- Applying the correct dosage.
- Timing the spray application.
When to start weed control?
- After sowing, ensure the recommended seed density per acre using monogerm seeds.
- Once sugar beet emerges, apply herbicide when weeds reach the two-leaf stage (approximately 12-15 days after planting).
- The best herbicides should contain three active ingredients:
- Desmedipham
- Phenmedipham
- Ethofumesate
Mode of Action
- Desmedipham & Phenmedipham: Inhibit Hill reaction in photosynthesis, stopping energy production.
- Ethofumesate: Prevents cell division and wall formation, leading to weed growth suppression.
Expected Results
- Weeds stop photosynthesizing and growing.
- Gradual yellowing and wilting occur.
- Complete weed death within 2-3 weeks post-application.
Recommended Herbicide Dosages
- 650 ml/acre for Betanal MaxxPro.
- 1 liter/acre for Python.
- 800 ml/acre for Tegro.
- 400 ml/acre for Beta Sana Trio.
Number of Applications
- One to three applications, depending on weed pressure.
Additional Protection – Metamitron
- Found in Goltix herbicide.
- Prevents germination of new weed seeds from the soil.
- Application:
- Pre-emergence: 1.5 liters/acre.
- Post-emergence (combined with other herbicides): 350 ml/acre.
Mechanical Weeding (Hoeing)
- 25-30 days after planting, mechanical hoeing can be done once or twice.
- Best performed when sugar beet has 6-8 true leaves.
By following these practices, sugar beet farmers can effectively manage weeds and maximize crop productivity.
