Pesteleminater Log

Strawberry root weevils: Control and prevention

strawberry root weevil on a leaf

Strawberry root weevils can cause a great deal of damage to plants in private gardens, they are also a great danger to plants and crops in agriculture. Plants attacked by strawberry root weevils are more susceptible to attacks from other pests since the weevils will weaken the plant's ability to fight other pests. In most cases, this will end up killing the plant. Damage to the leaves of the plant will often be observed, but the real damage caused by weevils is to the roots of the plant.

Strawberry root weevils as a pest

Adult strawberry root weevils will rarely cause significant problems, but the appearance of bite marks in a plant's leaves can be unsightly. The larvae, which live close to an affected plant and feed on its root system, are the ones responsible for the majority of the damage. A plant that is afflicted by this will eventually perish, and the majority of deaths will take place in the months of March or September, when the larvae begin to hatch and grow.

The introduction of weevils into new environments is almost always attributable to human activities. First, through the international exchange of plants and soil, and then, secondly, on a local level between shops and customers or among private individuals trading and selling plants, soil, and garden equipment amongst themselves at the neighborhood level. Weevils are unable to fly, so in order for them to spread over greater distances, they require the assistance of human beings.

When it comes to the kinds of plants they feed on, strawberry root weevils tend to attack whatever is available. Rhododendrons, grapevines, and strawberry plants are just a few examples of these kinds of plants. They will focus their attention on herbaceous and woody garden plants the vast majority of the time, but they will occasionally go after ornamental shrubs and plants. Plants that keep their leaves throughout the year will be targeted more frequently than plants that lose their leaves over the course of the winter. It is important to note that Strawberry root weevils prefer to feed on plants that are growing in containers, as opposed to plants that are growing in loose soil in the garden. This is because containers provide easier access to the roots of the plants.

Adult beetles feeding on the margins of leaves will almost never cause the plant to perish and will almost never even cause damage to the plant, but it can make the plant look unsightly. However, there is no question that the larvae will pose a threat to the plant's overall health. Because of the damage they cause to the plant's roots, the plant will likely perish as a result.

5 ways to identify a strawberry root weevil infestation

Because the damage that weevils cause can easily be confused with that caused by other kinds of insects, determining whether or not you have an infestation of weevils can be a very challenging task. In addition to this, weevils are nocturnal creatures, which means that there is a good chance that you will never actually see one.

  1. Keep an eye out for leaves that have jagged edges; this is a sign that adult Strawberry root weevils have been feeding on the leaves from the inside out, which is why the leaves will appear to have jagged marks on the edges.
  2. Remove adult beetles from a plant by: using a piece of white paper underneath it and then shaking the plant vigorously. The weevils will escape the container and land on the white paper, which will make it simpler to spot them with the unaided eye.
  3. Look for larvae in the soil. The larvae of the strawberry root weevil can be identified as small larvae that crawl around the root system of a plant. Remove the plant from its container, and investigate the soil to find the larvae.
  4. Look for dying plants: since they very well might weevil larvae in the root system. If you have any plants that are dying, it is a good idea to check the root system for weevil larvae. It is possible that you will never know whether or not weevils are to blame for the death of a plant.
  5. Sticky traps: can be placed around the plant's base in order to catch the insects. Sticky traps can be used to catch insects. Any weevil that makes an attempt to climb the plant will become caught in this.

Prevent Strawberry root weevils from infesting your plants

Even though it is not possible to completely stop the occurrence of weevils, there are a few things you can do to lessen the likelihood that they will infest your plants. These things can help. You can prevent the occurrence of Strawberry root weevils by taking the preventative measures that are outlined in the following paragraphs.

  • Be sure to inspect both the soil and the plants for weevils after you bring new plants or soil onto your property.
  • By washing away the dirt with a garden hose, you can get rid of any larvae that might be hiding in the roots.
  • Make certain that your plants are in excellent condition and that they are receiving all of the nutrition that they require. They will have an easier time fending off attacks from weevils as a result of this.
  • Put sticky traps all around the base of plants that are susceptible to damage.
  • Utilize nematodes as a preventative measure. Nematodes are a type of microscopic roundworm that can infect and ultimately kill a wide range of different kinds of insects and slugs.

Get rid of Strawberry root weevils

Weevils are not the most manageable pest in terms of eradication efforts. Because they are only active at night, it is highly unlikely that you will ever even catch a glimpse of one of them. In order to get rid of the weevils, you are going to need perseverance and cunning, and the following are some of the methods that you can use to control them:

  • Sticky traps can lessen the severity of weevil infestations and should be used whenever possible. Glue rings or glue strips, which are attached to the bottom of the plant, can be used to trap strawberry root weevils. These weevils feed on the roots of the strawberry plant. When the weevils emerge from their hiding places at night in search of food, they will climb into the heart of the plant and ensnare themselves there.
  • Weevils can be caught by the person who is looking for them. It is best to complete this task at night, when the weevils are most active and most likely to be foraging for food. Under the plant, place something that can capture the weevils as they fall, and then begin shaking the plant. The weevils will become dislodged from the plant and can then be collected. You also have the option of using a vacuum cleaner to very carefully remove the weevils from the plant by suctioning them out.
  • Both adult weevils and their larval stages can be eradicated with the help of nematodes. The soil in your garden is treated with nematodes, which then cause roundworms to appear. The roundworms then infect the insects and slugs in your garden, which ultimately results in their deaths. Nematodes are an effective method for controlling weevils because, in addition to a wide variety of other pests that could potentially invade your garden, they prey on weevils specifically.
  • Weevils can also be eradicated with the help of an organic insect spray. You can spray it directly on weevils that are visible to the naked eye, or you can spray it on plants that are at risk of being eaten by weevils.
  • You can replace the dirt in the pot if there are no adult weevils present and the only thing that is bothering you are the larvae. Take the plant out of its container, wash the soil off of the roots, then empty the container and refill it with fresh dirt.

Facts about Strawberry root weevils

There are up to 97,000 different species of weevils that have been discovered across the globe. However, the strawberry root weevil, also known as Otiorhynchus ovatus, is one of the most troublesome and destructive weevils to plants. The genus Otiorhynchus, in which strawberry root weevils are found, is home to 1,500 different species of weevils altogether. The majority of the weevil species that belong to the genus Otiorhynchus are parthenogenetic, which means that they are able to reproduce on their own without the assistance of a male companion. This can result in pest infestations that grow at a rapid rate, and if unchecked, a single Strawberry root weevil can create infestations of epic proportions if allowed to continue on its merry way.


Weevils are a type of beetle that are small in size and have an elongated head, which is also known as a snout in some contexts. The antennae of the majority of weevil species can be retracted so that they lie flush with the head when the beetle is burrowing. This helps to protect the weevil from being damaged.

Approximately 6 millimeters in length, the Strawberry root weevil can be found in the roots of the plant. Weevils that feed on strawberry roots are dark in color and have patches of golden hair growing across the fused elytron (wing covers).

Behavior, lifestyle, and reproduction

It is unable to fly due to the fact that the beetle's wing covers have become joined together. It emerges from the soil at night to feed on the leaves of a plant, leaving notches in the margins of the plant's leaves as it does so.

Although it is possible for Strawberry root weevils to produce male offspring by fertilizing eggs, nobody has ever seen a male Strawberry root weevil. This is despite the fact that they are technically capable of doing so. The larvae are found in the soil, and they consume the root systems of the plants in that environment. They grow to a length of about 10 millimeters, have a body that is slightly bent, do not have legs, and are milky yellow in color with a head that is brownish in color. A single season may see a single female lay anywhere from a few dozen to several hundred eggs.

The strawberry root weevil is native to Europe, but it has since made its way to the continent of North America thanks to the transportation of plants and soil.

Frequently asked questions: Strawberry weevils

What are strawberry root weevils?

Strawberry root weevils are small, black or brown insects that feed on the roots and leaves of strawberry plants. They can cause significant damage to strawberry crops, leading to reduced yields and plant death.

How can I tell if my strawberry plants have been infested by strawberry root weevils?

There are several signs that your strawberry plants may be infested with strawberry root weevils: notched or jagged edges on the leaves, yellowing or wilting of the leaves, stunted plant growth, and the presence of small, black or brown insects on the plants.

How can I control strawberry root weevils in my garden?

To control strawberry root weevils in your garden, you can try the following methods: handpicking and removing any weevils you see from your plants, using a chemical insecticide specifically formulated to control weevils (be sure to follow the instructions carefully and apply the insecticide according to the label directions), using a biological control such as nematodes, which are small worms that can kill the weevils, and cultivating the soil around your plants to expose the weevils to birds and other predators.

How can I prevent strawberry root weevils from infesting my plants?

To prevent strawberry root weevils from infesting your plants, you can try the following methods: planting resistant varieties of strawberries, keeping your garden clean and free of debris which can provide hiding places for the weevils, removing and destroying any infested plants to prevent the weevils from spreading, and using a chemical insecticide specifically formulated to prevent weevils (be sure to follow the instructions carefully and apply the insecticide according to the label directions).

Can I use natural methods to control or prevent strawberry root weevils?

Yes, there are several natural methods you can use to control or prevent strawberry root weevils: handpicking and removing any weevils you see from your plants, using a biological control such as nematodes, cultivating the soil around your plants to expose the weevils to birds and other predators, and planting slug-repelling plants such as alliums or fennel around the perimeter of your garden to discourage the weevils from entering.

Pesteleminater Log
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