Lemongrass with Anthracnose? Rare but Treatable

Cymbopogon citratus

Susceptibility: Low Severity: High Difficulty: Easy

Anthracnose on Lemongrass: What to Know?

Anthracnose on Lemongrass (Cymbopogon citratus) is a fungal condition with high severity. Lemongrass has low susceptibility to this disease. Anthracnose is a fungal disease caused by fungi in the genus Colletotrichum that affects many plants, including vegetables, fruits, and trees. The disease thrives in cool, wet conditions, causing dark...

Lemongrass is a easy-care plant. Recovery from Anthracnose takes approximately 14 days with proper treatment.

Unlike most plants, Lemongrass has natural resistance to Anthracnose. Best treated with preventive measures rather than reactive treatment. Unlike bacterial infections, Anthracnose on Lemongrass can be managed with organic fungicides.

🔍 What Does Anthracnose Look Like on Lemongrass?

• Small irregular yellow or brown spots on leaves
• Dark sunken lesions on leaves, stems, flowers and fruits
• Water-soaked lesions that darken as they age
• Pink gelatinous masses of spores in lesion centers during warm, moist weather
• Spots that expand and may cover entire leaves
• Defoliation in advanced stages

❓ What Causes Anthracnose on Lemongrass?

→ Caused by fungi in the genus Colletotrichum
→ Cool wet weather promotes development
→ Optimum temperature between 75-85°F (24-29°C)
→ Foliage wet for extended periods of time
→ Fungi overwinter in seeds, soil and garden debris
→ Spores spread through water droplets

💊 How to Treat Anthracnose on Lemongrass?

TLDR: Treat Anthracnose on Lemongrass with quick treatment (~7 days) or organic (~14 days). Lemongrass has low susceptibility to this disease.

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Quick Fixes

Remove and discard all visibly infected parts

Apply commercial systemic fungicide (azoxystrobin or mancozeb)

Adjust irrigation to avoid wetting foliage

Second application of systemic fungicide

Assess treatment effectiveness

🌿

Organic Treatment

Remove all infected plant parts and discard in plastic bag

Apply organic liquid copper spray to all plant surfaces

Switch irrigation regime to drip, avoiding foliage wetting

Second application of copper fungicide or neem oil

Assess progress and remove any new lesions

Final organic fungicide application and ongoing monitoring

🛡️ How to Prevent Anthracnose on Lemongrass?

TLDR: Prevent Anthracnose on Lemongrass with 8 essential preventive care practices.

✓ Implement drip irrigation instead of overhead watering
✓ Give plants enough room to breathe and reduce humidity
✓ Remove infected plant material after harvest
✓ Practice crop rotation between hosts and non-hosts
✓ Choose resistant plant varieties when possible
✓ Use western grown seeds not exposed to the disease
✓ Avoid wetting foliage during watering
✓ Ensure good air circulation around plants

🌱 How to Care for Lemongrass to Prevent Anthracnose?

💧 How to Water

Water every 2-3 days, ensuring the soil stays moist but never waterlogged. Water at the base of the plant to avoid wetting the foliage, which can encourage fungal disease. Reduce watering in cooler months.

☀️ Lighting

Lemongrass requires at least 5 hours of direct sunlight daily. More sun equals higher essential oil concentration and stronger aroma.

🪴 Ideal Soil

Use fertile loamy soil rich in organic matter with good drainage. Ideal pH between 5.0 and 6.5. Avoid compacted or waterlogged soils.

Frequently asked questions

Can Anthracnose kill my Lemongrass?

Yes, without treatment, Anthracnose can be fatal to Lemongrass. Early detection and treatment are key.

How long does Lemongrass take to recover from Anthracnose?

With proper treatment, recovery takes approximately 14 days. Without treatment, it can take significantly longer.

Is Anthracnose contagious to other plants near Lemongrass?

Yes, Anthracnose can spread to nearby plants. Isolate the affected Lemongrass immediately.

See more: Lemongrass → See more: Anthracnose →