Organic insecticides for the vegetable garden

Organic insecticides for the vegetable garden

Organic insecticides for the vegetable garden: the list of all pesticides (do-it-yourself and not) that can be used in organic farming for the natural care of the garden.

Pyrethrum, natural insecticide

Pyrethrum is probably the most widely used natural broad-spectrum insecticide in organic farming. Many users, contacting me on facebook, reported a low effectiveness of this natural insecticide. Undoubtedly there will be strains of parasites that have become resistant to pyrethrin, the active ingredient of this insecticide but, in reality, much more commonly the ineffectiveness of pyrethrum such asorganic garden insecticide it is related to errors made in the application. How to use pyrethrum? Here are the instructions.

Not everyone knows, in fact, that pyrethrin is a photolabile molecule, which means that if you use the pyrethrum in the sun, in full light, this molecule is deactivated losing its effectiveness. Pyrethrum should be administered at sunset, so as to exert its action at night.

Natural insecticides that actually work

As with pyrethrum, the problem oforganic insecticides for the vegetable gardenit is a poor knowledge of the mechanisms of action of natural bioactive substances. From abiological pesticidewe cannot expect the same speed of action as a chemical insecticide. The action times are longer and the dosages higher. The pesticides that we find on the market, not allowed in organic farming, arebiocides a lot aggressive. We cannot expect the same timing but of course, with a little more patience, we will gain in terms of health and environmental protection.

Organic insecticides for the vegetable garden

Bio broad-spectrum insecticides for vegetable gardens:

  • Pyrethrum
  • Macerated nettle
  • Neem oil
  • Quassio
  • Garlic decoction

Biological insecticides against fungal plant diseases, also known as bio fungicides:

  • Horsetail decoction
  • Copper (e.g. Bordeaux mixture)
  • Sulfur (e.g. copper sulfur)

There is also the biological fight, which can be done with:

  • Bacillus thurgensis
  • Ladybugs
  • Curls
  • Toads and frogs

At the edges of the gardens, to attract the so-called "good insects", it is possible to grow dandelions, thyme, sage, geraniums and calendula.

Insecticides allowed in organic farming

In addition to the natural insecticides seen above, in organic farming it is possible to take advantage of a long list of pesticides allowed and listed in the reference legislation. The plant protection products allowed in organic farming are listed in Annex II of EC Regulation 899/2008 and subsequent amendments.

The small farmer which produces fruit and vegetables for direct sale or for self-consumption, if it wants to start growing products biological must use special insecticides for the vegetable garden. For the most part it is about insecticides not classified and natural, even if the European legislation forbiological agriculture provides for the use of some products classified as "toxic" and "harmful" and for their purchase it is necessary to have the so-called "license ".

Here are two of the natural insecticidesbroad spectrum most used in organic farming, these are products plant protection products allowed in organic farming.

Azadiracitin or Neem Oil

It's a insecticide of plant origin, extracted from the Neem tree is widely used inorganic garden. It can be applied on citrus, apple, pear, apricot, cherry but also on minor fruit trees such as strawberries, vegetables and ornamental and flowering plants. Such insecticide it must be used at the first signs of infestation. It is marketed under the trade name of Azactiva from Cerrus or Neemazal-T / S from Bayer. From the last treatment to the harvest, 3 days must pass.


Just like azadiracitin, this is also a insecticide widely used in biological practice. Even if it is a suitable product fororganic garden, from the last treatment and the fruit or vegetable harvest, up to 15 days must elapse, depending on the treatment performed.

Traps and biological fight

When it comes to "biological insecticides " reference is also made to real traps: to protect the organic garden from the infestation of flies and other insects, traps rich in a protein preparation are prepared which have the purpose of attracting insects and selectively eliminating them.

Other action products insecticide are those used in biological control, especially microorganisms such as fungi, viruses and bacteria. Among the bacteria, we point out the Bacillus thuringiensis sub kurstraki, there are different strains for different crops.

These bacteria are administered on the vegetation in the form of spores and crystals, the infesting larvae ingest the crystals which in the intestine of the larva break down into toxins causing the death of the animal.

Being an authentic living insecticide, it is important to use it in the same year in which it was produced: at the time of purchase it is important to check the production date! In some cases, to make the bacterial insecticides more palatable, it is advisable to add them with sugar or other ingredients that can act as bait.

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