Mango gummosis can be a nightmare for mango growers. It not only threatens the health of your mango trees but also hits productivity hard. Gummosis causes your once-thriving tree to leak sap and decay. The good news is, you can tackle this disease. With the right approach, you can keep your trees healthy and fruitful.

What is Mango Gummosis?

Mango gummosis is a condition where a sticky, sap-like substance oozes from the tree’s bark. This is usually a sign of trouble, often caused by fungal infections. The main culprit? A fungus called Lasiodiplodia theobromae.

Here’s what it looks like:

• Sticky sap leaking from lesions on the bark.
• Dark, sunken patches that seem to spread over time.
• Cracked bark that exposes the tree to further damage.

What Causes Gummosis in Mango Trees?

To fight gummosis effectively, you need to know what causes it. Here are the usual suspects:

1. Fungal Infections

Fungi like Lasiodiplodia theobromae and Botryosphaeria dothidea thrive in humid conditions. They sneak into your tree through any wounds, cuts, or damaged areas.

2. Environmental Stress

Too much rain, poor drainage, or soggy soil creates the perfect environment for fungi to grow.

3. Physical Damage

Accidental wounds from pruning, insect attacks, or machinery can allow infections.

4. Weak or Stressed Trees

A malnourished, under-watered tree is vulnerable to gummosis. Extreme weather can stress it, too.

What Are the Symptoms of Mango Gummosis?

Early detection is crucial when dealing with gummosis. Keep an eye out for these signs:

• Sap leakage: Amber-colored sticky sap oozing from cracks or wounds.
• Cracked bark: Dark lesions or peeling areas on the trunk and branches.
• Wilting or branch dieback: Leaves start drooping, and branches may die back.
• Premature fruit drop: Fruits may fall off before maturing, or the quality might suffer.

If you notice these symptoms, act quickly! Catching gummosis early can save your tree.

Can Mango Trees Recover from Gummosis?

The good news? Yes, they can—if the disease is caught early and treated properly. The tree’s recovery depends on:

• How bad the infection is.
• How healthy the tree was to begin with.
• Whether you take action quickly to address the issue.

In some cases, though, severe gummosis can lead to tree death. This makes early treatment even more important.

How to Manage and Treat Mango Gummosis

Dealing with gummosis involves more than just applying chemicals. You’ll need a mix of good cultural practices, treatments, and preventive steps.

1. Chemical Treatments

Fungicides can help stop the spread of the disease. Some effective options include:

• Copper-based fungicides like Bordeaux mixture.

How to Apply:

• Spray fungicides on infected areas as soon as you spot symptoms.
• Copper or Mancozeb – 2g per litter water two times 7 days gap.
• Always follow the instructions to ensure safety and effectiveness.

Use copper-based fungicide paste

2. Smart Farming Practices

Your tree care routine can make a big difference.

• Avoid overwatering: Ensure your soil drains well. Mango trees hate waterlogged roots.
• Apply mulch: Mulching keeps the soil moist without causing sogginess.

3. Pruning and Wound Care

• Prune infected branches immediately, but do it carefully.
• Use clean, sanitized tools to avoid spreading the infection.
• After pruning, seal cuts with tree paint or wax to block pathogens.

Prevention is Always Better

Don’t wait for gummosis to strike—prevention is your best defense.

• • Choose Resistant Varieties: Some mango varieties are naturally less susceptible to gummosis. Ask local experts for recommendations.
  • Inspect Regularly: Check your trees for damage, sap leaks, or unusual discoloration.
  • Keep Tools Clean: Always disinfect tools before and after use. Dirty tools can spread fungal spores.
  • Feed your trees with balanced fertilizers. Keep them well-watered and well-fed!

Why Do Mango Trees Leak Sap?

Sap leakage is your tree’s way of saying, Help! It’s usually triggered by:

• • Fungal infections.
  • Physical wounds (from insects, tools, or accidents).
  • Stress caused by poor care or environmental factors.

To stop the sap from leaking:

• • Treat the underlying infection promptly.
  • Avoid causing injuries during pruning or maintenance.
  • Ensure your tree gets the right balance of water and nutrients.

FAQs About Mango Gummosis

1. What’s the best spray for gummosis?

• Copper fungicides like Bordeaux mixture and Mancozeb work well.

2. Can gummosis spread from one tree to another?

• Not directly, but fungal spores can travel through wind, rain, or contaminated tools.

3. Does overwatering cause gummosis?

• It doesn’t cause it directly but creates conditions that encourage fungal growth.

4. How do I stop my tree from leaking sap?

• Address infections early, avoid injuries, and keep your tree stress-free.

5. Are some mango varieties more resistant to gummosis?

• Yes, resistant varieties exist. Consult local horticulture experts for advice.

Conclusion

Mango gummosis can feel overwhelming, but it’s not unbeatable. By knowing its causes and acting, you can protect your trees and enjoy a good harvest. Remember, healthy trees are happy trees—so give them the care and attention they deserve!

If you’ve dealt with gummosis before or have tips to share, let us know in the comments. Together, we can keep our mango trees thriving.

Admin

Rebecca Vittetoe
I’m Rebecca Vittetoe, a field agronomist working with farmers through Iowa State University Extension.

Most of my time is not spent in an office—it’s spent in the field. I work directly with farmers, crop scouts, and ag professionals to solve real problems they face every season. From pest pressure to nutrient issues, I focus on what is actually happening in the field—not just what is written in books.

Over the years, I’ve learned that good farming decisions come from a mix of research and real-world experience. That’s what I try to bring into everything I do.

At toagriculture.com, I share simple, practical insights from the field:

What I see in crops during the season
Common mistakes farmers make
What works—and what doesn’t

My focus areas include crop management, pest management, soil health, and cover crops. I’m especially interested in helping farmers improve productivity while keeping their farming systems sustainable.

Agriculture is always changing. My goal is to make that change easier to understand—and easier to apply in the field.