Spraying powdery mildew in mango

Powdery mildew in Mango:

If there is a mango disease that tough to fight…

…then its non-other than powdery mildew.

Why? You may ask.

This disease affects mango trees at the MOST CRUCIAL stage…


You’ll often see white ugly white patches on leaves, and flowers.

As the disease progresses, it eats on these delicate flowers causing them to dry out and drop.

You and I know what that means.

“It means you’ll harvest absolutely nothing from the trees.”

It means that your trees will abort their ‘FRUIT PREGNANCY.’

Think about that for a moment…

All the work you’ve done throughout the season is going to be zero.

Will you standby and do nothing about it?

The disease is hard to remove like a WITCHES SPELL.

Farmers try using many fungicides.

However, most of them aren’t strong enough to remove it.

Nevertheless, all is not lost for farmers—as a solution is finally in SIGHT.

Best Mango Powdery Mildew  Fungicide

Its Liquid Sulphur—Selling Under the Brand Name “SULGUARD”

This fungicide performs where others fail.

 It sniffs out the life out of the mildew, and lets the attacked flowers survive.

All you need to do is mix 80ml of the liquid sulfur in 20 liters of water.

Add a suitable wetting agent e.g. Agral, or aquawet.

If you don’t have a wetting agent, add 20ml of liquid/dish washing soap and you’ll be good to go.

powdery mildew in mango

Advantages of Using Sulguard

  1. The fungicide is affordable compared to others in the market.
  2. It’s safe to use and USDA recommends it in Organic crop production.
  3. The fungicide also acts as a like a foliar feed. It contains beneficial sulfur to the growing plant.
  4. You can harvest 1 or 2 days after spraying the fungicide.
  5. Funguses are not able to develop resistance with repeated use of Sulguard.

Frequently asked Questions about Mango Powdery Mildew:

What is the name of the Fungus that causes the disease?

The disease powdery mildew, caused by the fungus Oidium mangiferae.

Which conditions favor the disease?

Cool and cloudy weather favors the development of the disease.

It also occurs in warm and humid climatic conditions.

Which Part of the mango does Powdery Mildew Attack

The disease attacks the leaves, buds, flowers and young fruits.

It covers infected parts with a whitish, powdery growth of the fungus.

The wind easily blown Mature fungal spores and when they land on another mango plant they produce a fresh infection.

If the spores don’t get optimum conditions after been blown by wind, they remain dormant season until conditions improve.

How Many Times Should I Spray the Fungicide?

If you are using liquid Sulfur (Sulguard, Spray after every 4 days until the disease clears).

If you are using other fungicides, spray 3-5 times at 10-14 day intervals from the onset of flowering until fruit set can control powdery mildew.

What other Fungicides Can I Use?
  1. Benomyl,
  2. Pyrazophos,
  3. Triadimefon,
  4. Bupirimate,
  5. Triforine and
  6. Sulphur,

Please remember to mix these fungicides with a with a spreader/sticker to increase their efficacy.

Are all Mango Varieties Vulnerable to Powdery Mildew?


All mango cultivars are susceptible to powdery mildew

infestation to some extent.

The range of resistance (with Sensation being the most

resistant) could be: Sensation, Chino, van Dyke, Tommy Atkins, Sabine, Kent, Keitt, Gesine, Batawi, Apple, Ngowe, Haden, Maya.

Is it economical to use Liquid Sulfur (Sulguard) and Other Fungicides?


When you use liquid sulfur, you’ll see a remarkable increase in fruit production.

Farmers report increases ranging between 40% to 500%.

Therefore, he input costs of the fungicide applied per tree is justified.

What is the Cost of Sulguard?

Sulguard is currently selling for a discounted price of Kenya Shillings 700/=

Where can I get Sulguard?

Contact the seller via WhatsApp on the following line:

+254739719879 or you can contact him directly by hitting the WhatsApp floating icon below.

Related: Growing Mangos In Kenya