Why is my Garlic Showing White Spots on its Leaves in the Field?
Garlic leaves develop white spots due to a fungal disease called purple blotch. This disease is caused by the fungus Alternaria porri and is most common in warm, humid conditions. The spots start as small, white or light green circles and gradually enlarge, becoming purple or brown with a yellow halo. If the infection is severe, it can cause the leaves to yellow and die, reducing the yield and quality of the garlic bulbs.
Cultural Control Measures:
- Plant garlic in well-drained soil.
- Avoid overwatering, as this creates a favorable environment for the fungus.
- Remove and destroy infected leaves to prevent the spread of the disease.
- Rotate crops to reduce the buildup of the fungus in the soil.
Chemical Control Measures:
- Apply a copper-based fungicide, such as copper oxychloride or Bordeaux mixture, once the disease is detected.
- Follow the manufacturer's instructions carefully and avoid using copper-based fungicides too frequently, as they can accumulate in the soil.
Related Questions:
- What color are the spots on my garlic leaves? White or purple.
- What causes white spots on garlic leaves? Purple blotch fungus.
- How can I prevent purple blotch in garlic? Use cultural practices such as planting in well-drained soil and avoiding overwatering.
- Can I use chemical control to treat purple blotch? Yes, apply a copper-based fungicide as directed by the manufacturer.
- Is purple blotch harmful to humans? No, it does not affect the edibility of garlic bulbs.
Related Hot-Selling Products:
- Miracle-Gro Performance Organics All Purpose Plant Food
- Bayer Advanced Disease Control Fungicide
- Bonide Copper Fungicide Ready-to-Use
- Scotts Lawn Food Sun & Shade
- Ortho MAX Disease Control Concentrate
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