Find out how to do away with weevils at house and within the backyard?


Weevils or Sitophilus oryzae are small insects that measure between 2 and 4 mm. Although they are generally black, we can also find red ones. And if they are the subject of an article today, it is because these little animals have the annoying habit of finding themselves in our provisions, even in the best packed packages! Grain lover, the weevil targets more particularly our grain reserves. It is therefore not uncommon to find it in bags of lentils, rice, dried beans (red beans, white beans, etc.), pasta, chickpeas, etc. We therefore tend to confuse it with food moths. The latter, however, are more like butterflies, where the weevil is more like the beetle, and has three pairs of legs and a proboscis. However, the methods of getting rid of these critters can be similar. Find out with us how to eliminate weevils.

Are weevils dangerous to health?

weevils in rice
Credit: iStock

The female weevil makes a hole in the grain or bean, deposits its egg there and closes it all with a mucilage which hardens over time. The larva ends up growing there more and more to the point of having to one day come out. However, very often, we consume everything before the larva has had time to escape! Fortunately, weevil larvae, like their droppings, do not present no danger to our health and are edible. The insect itself does not sting or bite. So you are reassured! In particularly sensitive people, however, there may be an allergic risk. People with allergies should therefore be careful!

How to avoid and limit weevil invasions at home?

It is difficult, if not impossible, to avoid bags of infested food when purchased at the store. The larvae indeed hide inside the food! However, you can at least avoid buying damaged or damaged packages. Both in the store and in your closets, you can also try to shake containers to see if weevils are there. They do not in fact withstand shocks and will point the tip of their nose after a few minutes. Once the infestation is spotted, do not hesitate to remove these animals with a spoon. If this really bothers you, throw the infested food contents into an airtight garbage bag and get rid of it quickly.

Besides, put all your groceries in a dedicated glass jar as soon as you get home. This preventive tip limits the risk of spread from one food to another. And in addition, it will also interfere with any moths!

How to get rid of weevils in the house

weevils in rice
Credit: iStock

1) Do a very thorough cleaning

Whatever technique you use to get rid of it (throwing out the infested food or using the tips below), you will need to accompany it with a good cleaning. Vacuum every nook and cranny of the infested cupboards, not forgetting the surrounding baseboards, cracks and floors. Then think about emptying the contents of the vacuum cleaner bag in an airtight garbage can which you will get rid of quickly.

2) cold to eliminate weevils

Below 10 ° C, weevils can no longer develop. After a cold treatment, you can easily remove them. To carry out this treatment, you can consider taking your food outside in the cold. You can also put your food in the refrigerator for a few days in a closed jar. Also, be aware that three days in the freezer is very effective for processing powdered or crushed cereals before you store them in your cupboards.

3) Heat: also effective

When you cook your pasta or rice, it kills the weevils. They then tend to rise to the surface. You can then pick them up with your skimmer. You can also process whole grains such as rice in an oven preheated to 60 ° C. To do this, rinse the cereal thoroughly under water. Then drain it carefully and bake it for 15 minutes. This will effectively kill the eggs. You can finally let the food cool before putting it in the cupboard.

4) slip repellents into the cupboards

To scare away weevils, slip bay laurel into cans of flour, wheat, rice, and any grain or seed. Other repellents include rosemary, garlic, cloves and even black peppercorns.

How to get rid of weevils in the garden

garden weevils
Credit: Pixabay / MelaniMarfeld

Whether it is flowers, shrubs or vegetable plants, weevils do not leave the garden and vegetable patch in peace in the event of an invasion. They can also dig holes in leaves, stems or fruit to lay eggs, which is detrimental to the health of the garden. The gardener must therefore be attentive to identify a colony of weevils, the latter being visible to the naked eye within the plants. If you have identified any, here are some tips!

1) Shake infested plants

The weevil does not like to be disturbed. Shake the plants allows you to drop larvae and insects in order to recover them and destroy them in a bucket of soapy water. Ideally, do this at night with the help of a flashlight!

2) adopt the right gardening gestures

Always to disturb these insects in their development, it is possible to consider hoeing and watering the garden very regularly. In addition to frequent watering and hoeing, take all measures to avoid general contamination. Cut off any infested branches you spot and dispose of them in an airtight bag. If a plant seems completely affected, do not hesitate to pull it out. It is indeed better to lose a shrub than all your plantations!

3) Use repellent plants to scare them away

The fragrant flowers and plants are good repellents to scare away these animals. The gardener can therefore plant it near plants that are regularly attacked. In this area, the irises are very famous. Otherwise, it is also possible to grow bay leaf, garlic or even rosemary.

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