Pest Control

How to prevent and eliminate aphids on cannabis

Eliminate aphids on cannabis

What exactly is an aphid? Belonging to the Hemiptera group of insects, aphids are parasites that reach approximately the size of a pinhead, or 1-3 mm. They are easy to spot with the naked eye and can appear in various colors, but most aphids are black, brown, or green. Usually, the difference depends on their food source.

Removing aphid pests on Marijuana
Removing aphid pests on Marijuana

How to prevent and eliminate aphids on cannabisThere is a widespread and destructive insect called aphid among the many insects, fungi, and viruses that can attack our marijuana plants. This is a pest that can, in large colonies, destroy marijuana plants.

Having a plague of aphids is not the end; we have the necessary means to stop the pest and eradicate it at our disposal. Although, as we always say, prevention is the best way to avoid these problems.

We will explain what aphid is and how to prevent and eliminate them with home remedies and products made for this purpose.

What are Aphids?

They have wings and can quickly spread from plant to plant when needed, although they typically congregate in colonies on the underside of leaves and stay there until the plant no longer provides any benefit to them. They will destroy one plant before going to another and repeating the process.

What is a aphid?

A unique feature of aphids is the secretion of a sugary substance called “honeydew.” This sticky material attracts ants and, in some cases, bees. Aphids develop a symbiotic relationship with both insects and use them as protection against predators such as ladybugs or wasps. There are situations in which the ants bring the aphids to a specific place to be then able to collect their precious “honeydew.” They not only hurt the plants by extracting their sap but also transmit viruses and disease and facilitate the transmission of fungi.

As if this were not enough, when communities are extensive, aphids repeatedly pierce the stems of plants seeking refuge there, laying eggs, etc… They breed more quickly in hot weather, so indoor crops are more likely to develop large communities of aphids.

Aphids pose a dangerous threat to cannabis plants, especially those grown in grow boxes or greenhouses. Warmer temperatures make these areas a breeding refuge for female aphids. The problem is further compounded by the fact that their reproduction cycle is relatively short, meaning they can multiply at an alarming rate under optimal conditions.

Conversely, in cold climates, they appear to disappear, something that can make us believe that we no longer have a problem, but unfortunately, nothing could be further from the truth. Their eggs can overwinter and hatch during months when temperatures rise again … starting to recolonize the plant.

They have a particular preference for the young shoots (new leaves and branches), although we can find them anywhere on the plant.

How to detect and prevent aphids on Marijuana plants

What is a aphid?Identifying them is simple: they tend to congregate at the bottom of the leaves and around the young stems. It is one of the few pests that affect cannabis and can attack the branches. The honeydew we referred to earlier is a telltale sign. Not only does honeydew attract other pests, but it encourages mold growth. Look for black spots on the upper side of the leaves.

Luckily for us, they are straightforward to detect with a simple visual inspection of our plant, observing stems and leaves (especially on the underside – bottom of the leaf), we can catch them immediately. They live in colonies ever-expanding, so on close inspection, we see a large infestation of white, yellow, or brown insects will give us a final clue to determine whether we have an aphid infestation.

When the number of these insects is high, we will see how the leaves are dried and new branches wither .. sign that they are absorbing a lot of the lifeblood of our plant, which is the sap.

Preventative Measures

There are always two golden rules for dealing with them: aphids or any other insect infestation. First, a clean and well-maintained growing environment is the best defense against pests, and this means removing weeds and cleaning tools and substrate between crops. Second, a quick response to any pest threats will ensure that the damage is minimized. After spotting an infestation, immediate action is the best remedy, so don’t wait!

Regular observation is the first preventative measure you can take. Checking your plants every week will make it much easier to spot aphids. Beware of warm, dry temperatures in early spring or if you use a lot of fertilizers. These are factors that can encourage the arrival of aphids.

Removing aphid pests on Marijuana

Removing aphid pests on MarijuanaThere are several ways to eliminate this annoying and destructive plague of our growing Marijuana, which they recommend are clean alternatives (using natural products 100% BIO), even if the pest is widespread. We have not started the flowering period …. We can also use chemicals.

The best way to prevent this plague in our cannabis plants is by using a natural, 100% biological method of pest control that does not adversely affect the plant or the environment. Ladybirds and their lave are veracious hunters of aphids and should be encouraged in our gardens.

Aphids have many natural predators if you want to use mother nature to your advantage. Ladybugs are very effective in dealing with an aphid infestation, as are parasitic wasps.

The outbreak is dealt with naturally by releasing these predators when the early stages of an aphid problem are noticed. But if it’s not easy for you to have large numbers of insects, or the infestation has already moved to a worrying level, organic pesticides are the next step.

Homemade sprays

Failing the natural predator route, we can use neem oil as a natural preventive, diluting it in water and spraying our plant every day in the veg cycle until the pest has been eliminated.

Finely chop some tomato leaves to fill two cups. Combine them with two cups of water in a large pitcher to hold both and let them sit overnight.

Strain the liquid, remove the leaves and dilute with two more cups of water. The mixture can be used in a spray bottle to deal with aphids.

Snuff diluted with water and sprayed plants is another homemade remedy. Nicotine is a potent poison used in many chemical insecticides, but it is advised that this preparation leaves a particularly unpleasant smell in our plants.

Neem oil and insecticidal soap

Neem oil and insecticidal soap are both excellent choices for treating aphids, and they shouldn’t affect your crops unless you spray them directly on developing flowers. They are available at garden stores, but if you prefer a homemade remedy for aphids, the following spray is easy to make.

Spray the spray on infested areas, including leaf stems and plant stems. Make sure you avoid flowers, as you don’t want your final product to taste like the spray. Some sprays can also burn young flowers. For this, spraying only the leaf’s surface as accurately as possible is essential.

Within natural alternatives, it is advisable to perform periodic treatments with neem oil and potassium soap diluted in water. With the help of a sponge and careful wiping of the leaves, it will remove aphids taking care not to damage the plant. We repeat this every ten days until the infestation completely disappears.

We may also use pyrethrins (chrysanthemum extract), an organic product that acts as a natural insecticide and repellent. Some people use homemade preparations such as nettles slurry, which also acts as a natural insecticide.

Another remedy that others have had great success with is to dilute a few drops of dishwashing soap in a liter of water and spray the solution onto the insects; this has the effect of drying the insects out.


Cannabis Sativa, Cannabis Indica, and Cannabis Ruderalis: Thank you for being the “Gateway drug” to perpetual inspiration, compassion, benevolence, and medicinal miracles: Cannabis grower, photographer with a long experience in cannabis cultivation. His articles are journalistic reports of places where cannabis is already legally cultivated and owned. They are intended to give an impression of the wide range of cannabis cultivation. These reports are intended to help identify the truth about cannabis and reduce prejudice.

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