Sorghum Prone to Anthracnose: How to Protect

Sorghum bicolor

Susceptibility: High Severity: High Difficulty: Easy

Anthracnose on Sorghum: What to Know?

Anthracnose on Sorghum (Sorghum bicolor) is a fungal condition with high severity. Sorghum has high 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...

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

Sorghum is highly susceptible to Anthracnose, unlike most plants in the same family. Without early intervention, recovery takes 21 days instead of 14 days. Unlike bacterial infections, Anthracnose on Sorghum can be managed with organic fungicides. Without precautions, chemical treatments for Anthracnose can be harmful to pets. Use organic methods for Sorghum in pet-friendly homes.

🔍 What Does Anthracnose Look Like on Sorghum?

• 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 Sorghum?

→ 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 Sorghum?

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

⚡

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 Sorghum?

TLDR: Prevent Anthracnose on Sorghum 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 Sorghum to Prevent Anthracnose?

💧 How to Water

Water deeply about once a week (roughly 1 inch / 2.5 cm of water), avoiding waterlogging. Once established, the plant tolerates dry spells well thanks to its deep root system — reduce watering during extended drought, but never let the soil dry out completely during flowering, the most water-sensitive stage.

☀️ Lighting

Requires full sun (6 or more hours of direct light per day) — it cannot grow in shade. Plant in an open location free of shading from trees or structures to ensure good flowering and grain production.

🪴 Ideal Soil

Adapts to sandy, clay, or loamy soils, but prefers fertile, well-draining soil rich in organic matter, with a pH between 5.5 and 7.5. Compacted or waterlogged soil harms root development.

Frequently asked questions

Can Anthracnose kill my Sorghum?

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

How long does Sorghum 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 Sorghum?

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

See more: Sorghum → See more: Anthracnose →