Onion Purple Blotch: Complete Treatment Guide
What is Onion Purple Blotch?
Symptoms
- White initial spots
- Purple centers
- Brown borders
- Concentric rings
- Dark spores
- Leaf dieback
What Causes Onion Purple Blotch?
- Alternaria porri
- High humidity
- Leaf wetness
- Warm weather
- Poor air flow
- Plant stress
How to Treat Onion Purple Blotch
Organic Treatments
- Copper fungicide
- Air circulation
- Remove debris
- Plant spacing
- Clean practices
- Organic sprays
Chemical Treatments
- Protective fungicide
- Systemic sprays
- Regular treatment
- Preventive sprays
Cultural Controls
- Proper spacing
- Good drainage
- Air circulation
- Debris removal
- Crop rotation
- Plant health
How to Prevent Onion Purple Blotch
- Resistant varieties
- Proper spacing
- Air circulation
- Timing irrigation
- Clean practices
- Regular monitoring
Recommended Fertilizers for Onion Purple Blotch
- Balanced nutrition
- Plant strengtheners
- Disease resistance
- Growth promoters