Durian Leaf Anthracnose: Effective and Fast Control Methods

TÓM TẮT NHANH

Anthracnose is a fungal disease (commonly occurring in high humidity conditions)

Causes:

• Leaf burn
• Affects fruit set

Core solutions:

• Improve orchard ventilation
• Spray at the right time
• Combine nutrition + water management

1. WHAT IS DURAIN LEAF ANTHRACNOSE?

It is a fungal disease (mainly caused by Colletotrichum spp.)

It develops strongly during:

• Rainy season
• High humidity
• Dense orchards

This is a common disease that, if not treated early, can:

• Weaken the tree
• Significantly reduce yield

2. EARLY SIGNS TO IDENTIFY

Early stage:

• Small brown spots appear
• Slight yellow halo

Severe stage:

• Lesions spread
• Leaf burn
• Leaves dry and fall

Common confusion:

• Easily mistaken for sunburn or nutrient deficiency

How to distinguish:

• Anthracnose: concentric rings, spreading lesions with a clear center
• Nutrient deficiency: uniform yellowing, no spots

3. CAUSES OF THE DISEASE

3.1. High humidity

• Frequent rain, night dew
• Leaves stay wet

3.2. Poor ventilation

• Dense canopy
• Lack of pruning

3.3. Nutrient imbalance

• Excess nitrogen
• Lack of Calcium (Ca) and Potassium (K)

3.4. Residual infection sources

• Fallen infected leaves
• Not properly removed

5. EFFECTIVE MANAGEMENT SOLUTIONS

Solution 1: IMPROVE ORCHARD VENTILATION

• Prune branches, shape canopy
• Reduce humidity
  👉 This is the most important step

Solution 2: REMOVE INFECTION SOURCES

• Collect infected leaves
• Destroy or compost properly
• Reduce fungal pressure

Solution 3: WATER MANAGEMENT

• Avoid prolonged leaf wetness
• Limit overhead irrigation

Solution 4: BALANCED NUTRITION
Increase:

• Potassium (K)
• Calcium (Ca)
• Essential micronutrients

→ Helps leaves become thicker and more resistant

⚠️ Limit nitrogen fertilization to avoid disease development

Solution 5: SPRAY AT THE RIGHT TIME

Solution 5: SPRAY AT THE RIGHT TIME
Many farmers report effective use of the solution set: Siêu Khuẩn + TRIDO 450WP

Principles:

• Spray early when symptoms first appear
• Rotate products to avoid resistance

Solution 6: BIOLOGICAL CONTROL
Use:

• Trichoderma
• Beneficial microorganisms

→ Reduce long-term fungal pressure

Solution 7: PREVENTION BEFORE RAINY SEASON

• Apply preventive sprays regularly
• Prevention is more effective than treatment

6. PRACTICAL FIELD PROCESS

At early stage:

• Day 1: Remove infected leaves
• Day 2: Apply broad-spectrum fungicide
• After 5–7 days: Spray again (rotate product)

When severe:

• Heavy pruning
• Spray 2–3 times consecutively (5 days apart)
• Combine with recovery nutrition

7. QUICK SUMMARY TABLE

Factor	Common Mistake	Solution
Humidity	Prolonged wet orchard	Improve ventilation
Nutrition	Excess nitrogen	Increase K, Ca
Chemicals	Late spraying	Early spraying
Infection	Not removing leaves	Collect & destroy

8. FAQ – FREQUENTLY ASKED QUESTIONS

1. Does anthracnose cause fruit drop?
👉 Yes
→ Severe infection weakens the tree → fruit drop

2. Is one spray enough?
👉 No
→ Requires 2–3 sprays + integrated management

3. Should preventive spraying be done?
👉 Highly recommended
→ Especially before the rainy season

9. CONCLUSION

Durian leaf anthracnose is not difficult to treat, but the challenge is:
👉 Many farmers treat it too late or incorrectly

To manage effectively, you need to:

• Use the right products
• Apply preventive measures
• Combine multiple solutions
• Maintain good orchard ventilation

👉 Done correctly, disease incidence can be reduced by 70–90%

10. CONTACT

For more information about Siêu Khuẩn, TRIDO 450WP , and other MEPES products, or for technical consultation on crop care and protection, please visit:
https://www.mepes.vn/
Or contact: 1800 9227 – 0813 27 27 27 for the best support.