11 recipes for homemade insecticides and repellents that are easy to prepare

There are several recipes for homemade organic insecticides, fungicides and repellents that you can try in your garden. Here I found some that I didn’t know about and shared with you.

1. Garlic insecticide

10 cloves of garlic, with the peel and the whole, grate well with the magic wand or blender, with a little water. Add water to get up to 2 liters, stir well and let rest for 24 hours in a dark place and a closed vial.

After the rest period, filter the mixture and mix with another 5 liters of water. This preparation is for immediate use, sprayed on the plants. You should do one spray per week, with dry weather and up to 3 if the weather is rainy.

It is used to repel aphids, cabbages, aphids, whitefly and cicadas.

2. Nettle mush

1 kg of fresh nettles outside the flowering season. Cut the plants into pieces (use gloves to pick up the nettles and handle them) and mix the 10 litres of water. Beat the mixture well, cover the bottle and let it rest until it starts to ferment (you will know that fermentation is in progress when air bubbles begin to emerge in the liquid). Filter the liquid and store it in a cool place, away from sunlight.

To use, dilute 1 litre of leachate (fermented nettles) in 10 litres of water and spray the plants weekly as prevention against aphids.

This nettle slurry can also be used, less diluted, as a liquid fertilizer (3 liters of manure should be diluted in 10 liters of water) and added to the watering that is done to the plants.

3. Onion

Beat a chopped onion, with water, in the blender or wand. Filter the mixture and add water to obtain up to 2 liters. Use this liquid to spray your plants.

4. Mint

Mint is an excellent repellent for some insects. You can use mint in tea, then cold, or blended with water, in the blender. Apply immediately after doing so.

5. Vinegar with oregano

Make a decoction of vinegar with oregano – just boil the vinegar with the oregano, for 3 minutes. Leave to cool, face up and apply to the leaves and stems of the plants, to repel ants and caterpillars. The best way to apply is with a hand spray.

6. Tomato

Prepare strong tea leaves and tomato stems and use it as an insecticide against aphids. Apply after the cold on infested plants.

7. Equisetum Tea

Prepare a decoction of horsetail (10 g – dry, 30 g – fresh) ground in 1 liter of water. Boil for 25 minutes. Filter and dissolve in 9 liters of water. After the cold, spray on your plants.

8. Milk insecticide

The recipe is: 1 portion of milk in 10 portions of water. Mix well and spray on plants that need treatment.

9. Squares of paper or strong yellow plastic

Many insects are attracted by the yellow color, especially flies. Spread in your garden square of intense yellow coated with honey, glue or other resin. Flies will be attracted and will stick to them. From time to time, replace the traps.

10. Ash and sawdust

Spreading wood or sawdust ashes between the feet of plants is quite effective against snails and snails. The ashes have the added advantage of being a very rich phosphoric fertilizer that is introduced gradually with the rains.

11. Chalda bordalesa

But if nothing works, you can use the Bordalesa syrup, which is an old chemical product, used in the prevention of agricultural pests and allowed in organic farming.

The Bordeaux mixture is a mixture of copper sulphate (100 g), virgin lime (100 g) and water (10 l). Place the copper sulphate in a cloth bag and soak it for 4 hours in 9 liters of water. Dissolve the virgin lime in 1 liter of water, mix to 9 liters with copper sulfate and mix well. Use plastic containers to avoid any reaction of sulfate with metal. The mixture should have a neutral or slightly alkaline pH to work, and this will vary depending on the amount of lime you have mixed. Try the pH by dripping part of the solution on an iron blade – if it gets brownish, it is still acidic and you should add a little more lime.