This article is written by Dr. Wilson Wong on how to use sulfur soap to kill mites. He is also the creator of GREEN CULTURE Singapore group in Facebook.

The picture shows the sulfur soap product most commonly available in Singapore.

How to use sulfur soap for pests control

ABC Shops and most provision stores

Sulfur, in its elemental form (as a molecule S8) is better known as a fungicide where it is used to manage fungal diseases such as powdery mildew, rust, scab, brown rot, and so on. It is often sold as wettable sulfur, which is micronized sulfur powder with a dispersant and sticking agent added. Lime sulfur is another product that has the same properties, made from reacting lime with sulfur. Both products are not readily available for sale in Singapore.

What is less well known is that sulfur can be used to control spider mites and broad mites. Both are common horticultural pests. For control of mites, the size of the sulfur particle is important. Sulfur flakes that are used for deterring snakes in the garden are too big to be of use. Due to the lack of wettable sulfur and lime sulfur in Singapore, the next best product that can be used is sulfur soap.

How to use sulfur soap for pests control

Spider Mites spread by webbing

Sulfur soap contains micronized sulfur (often up to 10%) in a soap base (a typical ingredient list of a sulfur soap includes soap noodle (Sodium palmate, palm kernelate), sodium chloride, water, fragrance, sulfur, coconut fatty acid). As one can see, it is made of saponified vegetable fats that are used to make soap. What is beneficial is that the soap base can be used against small sucking insects like aphids, mealy bugs, scales and so on, which kill by suffocation, mites included.


To use make a spray of sulfur soap for pest control, grate the soap bar into fine flakes and dissolve a level teaspoon of these flakes in small amount of hot water. When totally dissolved, top the solution up to 800 mL or 1 L with tap water. Shake vigorously before spraying. This solution can be kept for up to a week. Ensure all the soap bits are dissolved so as to not clog your sprayer.

Sulfur is known to be of low toxicity, and poses very little if any risk to human and animal health. It is harmless to bees. Note that sulfur is toxic to all mites, including predatory mites, so caution is needed in its use to not upset the ecosystem. Sulfur is allowed in organic agriculture. The rest of the ingredients in the sulfur soap bar are quite harmless – saponified vegetable fats.

Always test a small portion of your plant before spraying so as to ensure the dose is suitable for use on your plant without causing phytotoxicity. Make a more dilute solution if required. Avoid breathing in the mist or letting it get into your eyes.

Before consuming your plants, give the harvested parts a good soak and rinse. For heavily infested plants, prune away badly infested parts. Repeated applications on alternate days may be necessary. Spray during the cooler part of the day.

Sulfur soap seems to be suitable for use on plants that had previously been sprayed with oil-based pesticides like neem oil and summer oil. This is probably due to the soap component washing away the oils from plants. Wettable sulfur on its own is not suitable for use on oil-sprayed plants without having to wait for at least several weeks.

For more info, please refer to the following:…/pyrethrin…/sulfur-ext.html


Homemade Pesticide

While most of us fret over insects invasion on our chilli, tomatoes or capsicum plants, Pak Mat believes that Β “Prevention is the best cure!”

Pests free Chilli plants

Jan 24 2016 – Pak Mat’s extremely healthy chilli

Making organic pesticide

Jan 24 2016 – Pak Mat spray his plants with his home made pesticide once a week

Benefits of home made pesticide for plants

Pak Mat’s organic pesticide is safe for one month seedlings too

Home made organic pesticide for healthier and pests free Chilli plants

Jan11 2016 – Pak Mat’s chilli plants in cocopeat medium

Pests free tomatoes plants

Just look at how healthy Pak Mat’s tomato plants are!

Home to make organic pesticide

Pak Mat’s tomato plants!


Pak Mat made his own organic insects repellent which he sprayed on his plants once a week.

This is his recipe :

1. Garlic (ratio : 3 Garlic to 1 of the rest)
2. Blue ginger
3. Ginger
4. Onion
5. Hot chillie padi (pepper) – About 10 pieces, soak in hot water first
6. Neem (Margosa) Oil (1 teaspoon)
7. Dish washing liquid (1 teaspoon)

How to make and store plants pesticide and repellent

Center pic – measured , stored and froze pesticide portion to be used in sprays later, took less space than bottles

Home made organic plants repellent

Likely this is the only pesticide ingredients that are edible too!!! πŸ™‚


  1. Into blender, items 1 – 5 (sliced portion, add bit by bit into blender)
  2. Add water to aid the blending
  3. Pour thick mixture on a siever to collect liquid in an empty container
  4. Add Neem oil and liquid detergent
  5. Stirred well and allow the liquid to sit overnight before using on plants
How to make organic insects repellent and pesticide for plants

Pak Mat’s home made organic pesticide – may need to add water if its too thick to spray.

He advise caution for gardeners who like to try his remedy. The dosage is 5ml to a liter of water, adjust as necessary.

The liquid (in spray bottle, already mixed with water) will ferment over a few days if its not finished.

A thin layer of jelly substance appeared on the surface. This will not reduce its effectiveness, and its still safe for plants.

“The best way to see whether the above works well is to try on some leaves first. If everything is fine .. then only you spray on the rest of the plants.

Best time to spray is early morning or late evening. ”

He wanted to share what has work for him.

His plants have remained pests free so far. < Touch Wood!> πŸ™‚

Home made organic pesticide for very healthy and safe edibles garden

Jan 10 2016 – Pak Mat’s chilli

Last but not least, Pak Mat wanted to add a disclaimer, please try this at one’s own risk! πŸ™‚