Natural anti-aphids: what recipes? What solutions to spray?

Any gardener unknowingly has products in his cupboards allowing him to concoct an effective natural anti-aphid, which will harm neither plants, nor domestic animals and of course will not represent any danger for humans. Here are recipes for anti-aphids that are easy to make, and a few words about the ladybug, this great ally of the gardener who deserves its letters of nobility as it can lead a relentless fight against aphids.

Labeled black soap

It has long been used in the garden, as a spray, against aphids, spider mites, mealybugs and even thrips. Here are the two possible recipes:

  • Dilute 3 tablespoons of soft black soap (or paste) in 2 liters of hot water,
  • Dilute 6 tablespoons of liquid black soap in 2 liters of lukewarm water.

The mixture obtained, once cooled, is to be sprayed on plants sensitive to aphids and other unwanted parasites (vegetables, outdoor plants, shrubs, indoor plants, etc.). All aerial parts should be treated including the armpits and the underside of the leaves. After a first spray, you can treat again within 48 hours, then 7 days later. But usually it only takes a day or two for the aphids to be out of order. We advise to rinse the plants with clear water 24 hours after a black soap spray.

Black soap respects all plants. It is therefore used on vegetables, fruits, aromatic herbs … You just have to rinse the crops well before consuming them, which is anyway recommended even if no treatment is applied as natural as it is. . But let us note all the same that black soap is not toxic. However, you should always check that you are buying a black soap made using the traditional method, which contains no additives and is suitable for use in the vegetable garden.

Nettle manure

Here is another radical solution to eliminate aphids. A relentless natural insecticide, nettle manure is prepared as follows:

  • Place 200 g of freshly picked nettles (with gloves of course) in 2 liters of water then keep at the boil.
  • Then let the mixture macerate, which must absolutely ferment for at least 6 days.
  • Stir regularly each day with a wooden spoon.
  • Homemade nettle manure is ready when no more bubbles form. Depending on the ambient temperature, the procedure may take more than a week.
  • Filter.
  • Store in an airtight container reserved for this purpose. Note that it does not smell good at all! You might as well keep it in a room other than the home.

It is used after being diluted at the rate of one volume of nettle manure for 10 volumes of water. In addition to acting naturally against aphids and other parasites, nettle manure is also a excellent fertilizer for plants. Be careful, however, not to abuse it on flowering plants because it is very rich in nitrogen. Rather, it promotes foliage growth.

You can also use nettle manure pure (i.e. undiluted) because it then represents:

  • An unstoppable solution against fungal diseases,
  • An excellent compost activator.

It really has everything good, but be careful of do not use it pure on plants because it would risk burning their leaves.

Garlic cloves

For generations, gardeners have protected their roses against the onslaught of aphids by simply using fresh garlic. It’s a great solution, very economic (especially if you grow garlic in the garden) and 100% natural. Cherry on the cake, besides having power insecticide, garlic also acts as a antifungal.

The recipe for this natural garlic anti-phlegm is simple to achieve since it suffices:

  • To throw 10 cloves of garlic with their peel in 2 liters of water then bring the liquid to a boil,
  • Then reduce the mixture by about 30% over low heat,
  • To filter the potion obtained in order to pour it into a sprayer after cooling.

Then all that remains is to spray the plants colonized by the aphids which will disappear in a few hours.

Attract ladybugs

As we know, the ladybug is the friend of gardeners. To fight naturally and effectively against aphids, it suffices tobuy ladybug larvae in garden centers and place them on plants that attract aphids. They should be introduced as early as possible, if possible, as soon as only a few aphids are seen.

Ladybug larvae feed on these pests and they’re pretty darn voracious. A single larva devours every day up to 250 aphids ! When they become adults, ladybugs still eat a lot of them, even if they are less greedy than in the larval state. These beetles therefore make it possible to conduct a biological control mercilessly. The icing on the cake, we get the same result on mealybugs so difficult to eradicate by other means.

When buying ladybug larvae, you must choose the aphidiphagous species, that is, which feed on aphids. Among the 6,000 species of ladybirds recorded, only three are recognized as very effective auxiliaries against the following parasites:

  • Against aphids: C. Hippodamia undecimnotata, a migrating ladybug, and C. Adalia bipunctata, a two-spotted ladybug which is very common in our latitudes.
  • Against mealybugs and secondarily aphids: C. Cryptolaemus montzouzieri, a species of ladybird native to Australia.

In addition to buying its larvae in specialized stores, do not hesitate to install an insect hotel in the garden where these beetles can take shelter.

Coffee grounds

The coffee grounds can be spread at the foot of the plants which are collected in the filter of the coffee maker and which have been taken care to dry beforehand. It represents a fairly effective repellent against aphids and at the same time prevents slugs from nibbling on the tender leaves of many plants. However, coffee grounds are mainly used to treat small surfaces, especially since it must be renewed as soon as it has been wet.

Aphid repellent plants

Do not hesitate to cultivate certain plants as a preventive measure since they repel aphids. In this large family, we find:

All these species are to be cultivated in the vegetable garden and the pleasure garden without any moderation.

Finally, we must think about also get rid of ants because some species breed myrmecophilic aphids which produce honeydew on which the ants feed. Honeydew is none other than the liquid and sweet droppings of certain varieties of aphids which, for their part, consume the sugar-rich sap of many plants. But these ants can also devour the aphids they have protected. While coffee grounds work well against ants, they are not enough to treat an entire garden. It is therefore necessary to avoid letting aphids settle so as not to have too many ants… Elementary, right?