Biologically combat aphids - these 14 home remedies act

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For a biological agent to be really effective, a mechanical cleansing of the plant is essential in advance. Examine the plant thoroughly to see how strong and where the aphids are.


If you discover aphids on your houseplants, you should not immediately resort to pesticides. The easiest way is to wash off the plant first with water.
  • Plant in the shower or bath
  • Cover pot with garbage bag / plastic bag and tie together at the trunk
  • so the potting soil is not flushed out
  • Leaves leaves and stems from all sides (especially on the underside)
  • also put the plant on its side
If you do not want to wipe the aphids with your hands, it is best to use a soft toothbrush, especially for removal in the leaf axils. After shedding the plant must necessarily be isolated from the other houseplants. A slightly cooler, light room is ideal for this. If this is not possible, pack the entire plant in a large clear plastic bag. In this way you increase the humidity locally. Check the plant regularly in the next few days. The offspring of the aphids can hatch up to two weeks later from the hidden eggs and provide for a renewed infestation.

Greenhouse and outdoor plants

In the case of outdoor plants, too, the rule is that larger accumulations of aphids should be eliminated in advance, before the plant is sprayed with a suitable home remedy. Since the plants can not be excavated and kept under the shower, here is a different method than houseplants necessary. It is best to cut off all infested flowers and shoot tips generously and dispose of them in the household waste.
Since the aphids overwinter on the plants, it is advisable to cut shrubs back in spring. In this way, you already remove a large part of the eggs, which are preferably located on the shoot tips. Should it come despite all preventive measures to an infestation with aphids, this should be recognized as early as possible. Regular inspection is therefore essential.


However, with a purely mechanical removal of the parasites, aphids are far from being done. Basically you never really get all the lice and their eggs and larvae. The use of chemical or systemic agents should always be chosen only as a last resort, if the sucking pest home remedies can not be dealt with. There are a variety of home remedies that allow you to combat aphids biologically. Effective home remedies for aphids include:
For the effective control of lice, a remedy has proven particularly useful: soap solution. It is best to use soap or soft soap for this. In contrast to normal commercially available soap products, pure core soap and soft soap have the advantage that they are not perfumed and otherwise contain no harmful to the plant ingredients.
  • 20 g soft soap (potash soap) - equivalent to about 1-2 tablespoons
  • Alternatively, 20 g of soap (sodium soap) - preferably small pieces
  • dissolve in one liter of water
The mixture forms a film on the pests, so that the aphids can not breathe and die relatively quickly.

black aphids

Tip: The soap suds become even more efficient if you add some alcohol (a shot glass full).
Black tea
Even with black tea can annihilate the annoying sucking insects effectively. Make a tea.
  • 2 tea bags of black tea
  • pour over one liter of boiling water
  • let soak for at least 15 minutes
  • let cool down
rapeseed oil
Promising in the fight against aphids is also the use of edible oils such as rapeseed oil. The natural oil not only forms a greasy film on the leaves of the plant, making it difficult for the parasite to cling, but also encloses the lice airtight.
  • 1 liter of water
  • 80 ml rapeseed oil
  • a little detergent (as emulsifier)
  • mix well
Wash nutshells
The shells of soapnut (Sapindus mukorossi) have a pesticidal effect. They contain saponin, which is a soap-like, natural substance. This can be a cheap, non-toxic and odorless remedy for aphids. Soap nuts are available at the health food store or good drugstores.
  • shred ten wash nuts
  • Boil in 1 liter of water
  • Let it cool down
  • Strain solids
Tip: In addition to the above-mentioned home remedies for outdoor plants are also other home remedies that come because of their severe odor in the house only conditionally used.


Nettles grow everywhere along the way and often in their own garden. It is therefore not very expensive to get to the often misunderstood crop. Nettles are not only suitable for fertilizing plants (as manure), but also an effective home remedy for annoying aphids. The nettle poison kills the aphids. Otherwise, you only need a bucket and some water to make nettle sauce.
  • Fill half a bucket (10 l) with fresh nettles
  • Mince nettles
  • Fill bucket with water
  • Let stand for at least 12 hours
  • Strain solids
  • use a fine-mesh sieve or an old dishcloth
  • Nettle water catch
The effect of the field horsetail against aphids is due to the high content of silica back. The silicic acid strengthens the cells of the plant, making it difficult for the pests to prick through the leaf surface and suck the plant sap.
  • 100 g fresh field horsetail
  • use only the green, above-ground growing parts
  • alternatively 10 g dried field horsetail
  • 1 liter of water
  • Soak for 24 hours
vinegar water
If aphids of outdoor crops occur, a self-made, non-toxic mixture of household vinegar, water and a little washing-up liquid is recommended. With this solution, you spray your roses thoroughly from all sides, for example. The mixture consists of:
  • 4.5 liters of water
  • 500 ml household vinegar (5% acetic acid)
  • about 10 ml of detergent
  • mix well
Like vinegar, lemon also works. Cut the lemons into slices or small pieces and boil them in water. After cooling, sift the pieces off and use the broth as a spray.
  • 3 lemons
  • 2 liters of water
If the plants on the balcony or in the garden suddenly find larger populations of ants, this is usually a clear sign of aphid infestation. In order to use garlic effectively as a home remedy for the sucking parasites, there are basically two different options:

green aphids on a rose plant

Option A:
If the infestation is low, it is sufficient to put a peeled garlic clove in the ground next to each plant stem. This should half out of the ground look. So the garlic can distribute its essential oils also over the air around the plant and drive away thereby the aphids.
Variant B:
The second variant consists of a garlic broth, which is sprayed on the affected plant. The production is very simple:
  • Halve three large garlic cloves
  • put in a liter of water
  • let it rest for two weeks
  • Strain through a sieve or cloth
In case of not yet advanced infestation with aphids, an onionsauce is also promising.
  • cut two large onions into small pieces
  • in a pot with about two liters of water to boil
  • Let it rest for 30 minutes
  • after cooling, sieve onions
Oregano, which we know as ornamental and spice plant, contains effective substances against aphids. The spray is easy to prepare and very environmentally friendly. For the brew you need:
  • 100 g of fresh oregano
  • alternatively 10 g of dried spice
  • 1 liter of water
Put the oregano in a pot and brew with a quart of boiling water. After about 30 minutes you can sieve the herbs. The cooled Oreganosud is diluted after cooling three to one with water (three parts water, one part Sud) and is then ready for use.
neem oil
Another effective antiseptic agent is made with neem oil. Neem oil (Niemöl) is available in the drugstore or in the pharmacy.
  • 1 teaspoon of neem oil
  • 1 liter of water
  • a splash of soap as an emulsifier (without perfume and additives)
Especially the lice on roses and in the greenhouse can be easily combated with potatoes. The boiling water of the nightshade family contains solanine, which the lice do not tolerate. However, only use cooled brewing water that does not contain salt.
Fresh milk contains not only bacteria that work against fungi, but also many other ingredients such as lecithin, which can be used to combat pests such as aphids.
  • a part of fresh cow's milk
  • two parts of water


black aphids

Put one of the above-mentioned remedies against the aphids in a spray bottle and fog all the places where the sucking pests are located. Do not forget to wet the leaf undersides and leaf axils.
  • Spray plants dripping wet
  • treat for several days in a row (at least two to three)
  • Repeat procedure after 10 to 14 days
The offspring hatch after a week up to 14 days from the eggs. They too must be killed. If a follow-up treatment is forgotten, the infestation begins again after this time abruptly. Another check is necessary after every 10 days.

Preventive measures

Aphids infest preferentially weakened plants, so it is advisable to cultivate ornamental and useful plants under optimal conditions. The pests can also be driven by various fragrances and plant ingredients. These plants are placed between the crops. For the prevention of aphids the following measures are effective:
  • ensure sufficient humidity in winter (in indoor plants)
  • Avoid over-fertilization with nitrogen
  • ensure optimum temperature and lighting conditions
  • Repot potted plants regularly
  • Put savory and lavender between the crops
Which methods and which agents are effective against aphids depends above all on the strength of the infestation. If the infestation is still mild to moderate, help the most diverse home remedies, which are usually sprayed as a solution or decoction on all parts of the plant. In this case tenacity and endurance are needed, because the plant must be intensively treated and regularly checked for at least two to three weeks.

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