The pesticides approved in organic farming are largely the natural ones, though a limited amount of synthetic substances are permitted.
Let’s list these synthetic and natural pesticides used in organic farming and learn how to use them one by one.
1. BORIC ACID AND BORAX: This powder is commonly used to play carom has many uses in gardening. It’s mainly used to treat soil pests and insects like millipedes and also for ant control. Just sprinkle the boric acid over the areas of infestation and do not water for at least 24 hours. It acts as a contact poison and also as a stomach poison when the pests ingest this powder.
2. COPPER SULPHATE: This is used both as a fertilizer as well as a fungicide. As an anti-fungal, it can be used in the prevention and treatment of fungal diseases like the Powdery mildew, Leaf rust, black spot rose disease and any other serious fungal disease. This is the most effective anti-fungal in organic gardening.
How to Use it? Mix 20 grams of copper sulfate into 1 litre of water in a spray bottle and spray it on the affected plant. You can repeat this process after 1 week. Prepare only the required solution for the day and do not store it for next use.
3. TRICHODERMA VIRIDE: This is a certified bio-fungicide and is normally present in soil which controls other pathogenic fungi and prevents root rot and other harmful soil fungi. So, this can be used in the treatment of soil fungi, root rot, damping off in seedlings and also to treat fungus affected seeds or to prevent fungal infestation of seeds.
How to use it? For Preventing Canker and stem rot after pruning, make a solution by adding 10 gms in 100 ml water and apply this on the injured stem after pruning to prevent fungal disease.
To Prevent Seed Fungus, add 10 gms powder to 1 kilogram of seeds and mix well.
For plants that are wilting and you suspect a fungal disease in soil and root rot, mix 10 gms per litre of water and drench the plant and soil. Repeat after a week if necessary.
To Mix it in your potting mix, add about 10 gms to a potting mix volume of a 12 inch container and then repot your plant. This is particularly beneficial when you transplant your seedlings into fresh potting mix.
4. BAKING SODA: This is pure sodium bicarbonate which is mainly for cooking purpose and readily available in your kitchen. To use it as a fungicide, you can mix 2 to 3 teaspoons of baking soda in 1 litre of water and mix well and spray on the affected parts. If you want to make it more effective and a universal pesticide, you can add 1 teaspoon of oil like neem oil to this solution plus some 10 drops of liquid soap and spray on the plant. You can also use any vegetable oil, but best is neem oil and also clove oil or eucalyptus oil. Repeat this spray every week till your problem is solved. Apart from this there are about 10 uses of baking soda in gardening. You can check a detailed post on baking soda in garden.
5. DIATOMACEOUS EARTH: This magical organic powder has many uses in gardening like ant control, slug and snail control, preventing animals and rodents in your garden and mainly as an organic pesticide effective against all types of pests like aphids, mites, thrips, mealy bugs, caterpillars and even soil pests and insects. The mechanism of action is it’s a contact poison which kills pests by extreme dehydration. You can check a detailed post on DE powder.
How to use Diatomaceous earth on plants?
First of all Water your plants for the day. Then dust the plants with an applicator or just sprinkle the powder on your plants. To avoid killing beneficial pollinators like bees and butterflies, do not sprinkle on flowers.
6. HYDROGEN PEROXIDE: Though it a chemical with formula H2O2, which is similar to that of water, but with an extra oxygen atom. This concept is the key for using hydrogen peroxide in gardening. Well, to use it as an effective pesticide and antifungal, add 1 cup that’s about 250 ml of 6% hydrogen peroxide per litre of water or 2 cups of 3% h2o2 per litre of water. Load it in a spray bottle and spray on the plants. To control Fungus gnats and soil pests, you can water the plant with the same solution. Apart from this, hydrogen peroxide has many other miraculous uses like to save a dying plant, as a fertilizer and many other beneficial uses. You can check a detailed post on hydrogen peroxide in gardening.
7. VINEGAR: this is chemically called Acetic Acid. It’s an inexpensive product and found in most kitchens. In gardening we use 5% white vinegar or the distilled white vinegar. For the treatment of powdery mildew or spot fungus, add One cup of White Vinegar to 1 litre of water and shake well and spray it on the affected leaves. To use it as a pesticide, Add one cup white vinegar to 1 litre of water and then add some 10 drops of liquid soap and spray on the affected plants. You can check a detailed post on uses of vinegar in garden.
8. NEEM OIL: Neem oil is by far the best Organic Pesticide available worldwide. Azadirachtin and Nimbin found in neem oil are the two major compounds responsible for its antibacterial and antifungal actions. It is in fact a broad spectrum pesticide and the safest and most effective of all organic or natural pesticides. To learn about how to use it, the dosage and the patch test, You can check a detailed post on neem oil for plants.
The greenhouse millipede, also known as the hothouse millipede, short-flange millipede, or the garden millipede, is a common creepy pest in your garden that can cause severe damage to emergent vegetable seedlings and young plants.
How do I identify These Millipedes?
There are few types of these millipedes with hundreds of legs and can be white or brown or black in color. Unlike their cousin, the centipede, millipedes are not carnivores, instead they eat dead and rotting vegetation and they hide in moist places like your soil mulch layer, debris or inside the top layer of soil. They prefer darkness and moisture and hence they are more common in rainy season.
Are Millipedes Poisonous or Venomous?
Do not be
too scared, Millipedes, unlike centipedes, are not venomous and are generally
considered to be non-poisonous. However, there are some millipede species that release
some fluids that can cause irritation to human skin. Hence its always better to
wear garden gloves and employ safety precautions.
How do I kill or get rid off these
garden pests?
There are many solutions to control millipedes. We will list out these one
by one in 5 steps:
5. Visible Millipedes can be smashed or can be swept with a broom or a vacuum cleaner and can be disposed. But this is difficult because most of these are not visible and are found hiding under the soil or mulch layer.
4. Sticky Traps and Light Traps are another option that attract and trap these millipedes. But these are not available easily.
3. Chemical Pesticides: We will just name these pesticides because, we will not use any chemicals in our garden, specially vegetable gardening. The chemical pesticides that work are Propoxur, Cyfluthrin, Pyrethrins, Piperonyl butoxide, Deltamethrin, Cypermethrin, bifenthrin, etc.
2. Chicken and Cats: Before we proceed to our natural remedies, we will discuss on chicken. Chicken love to eat these type of insects and pests. Keeping a few hens can do wonders to get rid of these millipedes and even other pests in your garden.Cats, though they do not eat millipedes, they may chase them, play with them and smash them to some extent.
- Natural and Organic Pesticides. The mechanism of action of any pesticide whether organic or inorganic chemical is Systemic effect which can be slow in action and Contact poisons which kill the pests when they come in contact with it.
- Diatomaceous Earth is first in the list: This white powder is easily available at many garden stores and even online. Its completely harmless to people and pets.
- Borax: Similar to Diatomacous Earth, Borax is derived from boric acid and dries the millipedes out and kills them. It also acts as a stomach poison that will kill millipedes if ingested. It’s completely safe to humans. Just sprinkle the boric acid over the areas of infestation and do not water it for atleast 24 hours. You can check out my detailed video and article on boric acid or borax powder for plants and garden.
- Wood Ash: The action is similar to borax powder which dries out the soil and the pests. I also have a detailed video and article on the benefits of wood ash in gardening.