by M. Arjoca, vegetalshapes.com
Their most valuable quality is the fact that they are not dangerous for humans, plants, soil, generally for environment. They can be obtained from substances near at hand and without exorbitant prices.
They can be used on infested plants or as preventive method.
Because the insects react to odors, vapours, gases, fumes, heat, oils, soap etc., all these are used as/in organic insecticides. For example, the strong smell of garlic, tobacco, rhubarb and other plants are repellent for some insects. The hot peppers, alcohol, salt and other substances can burn and kill the pests. The oils suffocate some insects, the soap and the detergents added to solutions make the ingredients to stick on leaves and stalks. You can use organic soaps and detergents.
Don't use insecticides on sunny, hot weather because this will burn the plants and it's better if you sprinkle just a single plant at first to see if unwanted effects appear. The best time to apply insecticides is the morning and the evening.
Don't use insecticides if you can pick the pests by hand. Also keep in mind that not only the pest insects can be killed but the beneficial insects too. The plants have the capacity to protect themselves against some pests and growing companion plants is a good way for pest control. So you don't have to use insecticides every day but only when it is necessary.
Rhubarb tea, soap and oil solution, alcohol solution, tobacco tea, tobacco smoke, horseradish, orange peels spray, horsetail spray, yarrow tea, coriander tea, elder leaves tea, wormwood tea
Alcohol solution, oil solutions, chili peppers tea, garlic spray, rhubarb tea, tobacco tea
Garlic spray, horseradish solution, lime spray, rhubarb tea, soap spray, coriander tea
Here are a few organic insecticide recipes:
Rhubarb tea 1- boil 0,5 Kg (1 pound) chopped rhubarb leaves in 1litre (1 quart) water for 30 minutes. Filter and sprinkle against aphids and other pests.
Rhubarb tea 2 - put 0,5 Kg (1 pound) leaves in 7 liter (7.3 quarts) water and let it stay 24 hours. Filter and sprinkle.
Elder leaves tea - boil about 230 g (8 ounces) elder leaves in about 0,5 liter (0,5 quart) water for 30 minutes. Filter and let it cool down. Dissolve 1 table spoon of soap in another 0,5 liter (0,5 quart) lukewarm water. Add this soap water to the elder leaves tea and sprinkle with the new solution.
Tomatoes/potatoes leaves tea - put 2 cups of tomatoes/potatoes leaves in about 0,5 liter (0,5 quart) water and let it stay over the night. Filter and add another 0,5 liter (0,5 quart) water and ¼ teaspoon of soap. Mix and sprinkle on plants and soil.
Oil solution - mix 1 teaspoon of soap (liquid detergent) with a cup of vegetable oil. Add 1 liter (1 quart) water.
Alcohol solution 1 - mix 2-3 table spoons of soap with half a cup of alcohol and about 1 liter (1 quart) lukewarm water. Let it cool down.
Alcohol solution 2 - mix 1 teaspoon of liquid detergent with a cup of alcohol and 1 liter (1 quart) water. Separately mix 3 table spoons of crushed chili peppers (powder or hot peppers sauce) with a cup of boiled water. Filter and add the mixture to the detergent and alcohol solution.
Salt solution - mix 2 table spoons of salt with 4 liter (1 gal) water.
Garlic and hot peppers spray - crush a large garlic bulb, mix it with 1 table spoon of hot peppers powder and add 1 liter (1 quart) water. Let the mixture stay for an hour, filter and sprinkle. This mixture can be kept in refrigerator more weeks.
Garlic spray - mix 2-3 crushed garlic bulbs with 1 table spoon of hot peppers powder (or crushed hot peppers). Add 1 table spoon of vegetable oil, 1 teaspoon of liquid detergent and 7 cups of water. Mix well, filter and sprinkle with this solution.
Mint spray - mix with the blender a cup of chopped mint leaves, a cup of onions green leaves and half a cup of crushed hot peppers. Add half a cup of water. Mix well and put the mixture in about 4 liter (1 gal) water. Add half a cup of liquid detergent. From the new mixture take just half a cup and dilute it in 1 liter (1 quart) water.
Horseradish tea - boil 3 liter (3 quarts) water. Put the water away and add ¼ chopped medium sized root of horseradish and 2 cups of hot peppers. Let it stay 1 hour. When it's cool filter and sprinkle.
Calendula tea - mix 1 cup of smashed calendula leaves and flowers with 0,5 liter (0,5 quart) water. Let it stay 24 hours then filter and add 1,5 liter (1,5 quart) water and ¼ teaspoon of soap. Sprinkle with this solution.
Orange peels tea - pour 2 cups of boiled water over the peel from 1 orange fruit (or other citrus fruits) and let it stay 24 hours. Filter and add some drops of liquid soap. Sprinkle with this solution.
Wormwood tea - boil 250 g (0,5 pound) wormwood leaves in 2 liter (2 quarts) water. Cool, filter and add 1 teaspoon of soap. Sprinkle with this solution.