Many people have found that weevils have been a problematic issue around the kitchen. Grains, such as flour and rice are those kinds of food which are often infested by weevils—a very small species of beetles with size not more than ¼ inch.
Despite the tiny size, weevils are visible and in fact, may lay hundreds of eggs in the infested food goods, such as cookies, cereals, biscuits, cake premixes, flour, rice, cereals, and other grain-based foods. The nastiest thing is that when a single weevil is present in your rice, flour, and other grain foods, there are numerous weevil eggs which in fact, had been laid.
Hence, you will need to know how to get rid of these tiny beetles and to prevent them from re-infesting your pre-packed foods.
How to kill weevils
- Killing weevils with cold
The Very low temperature will freeze not only adult weevils but also their larvae and eggs. This is, therefore, an effective method of getting rid of them before they spread all over the stored foods. To kill weevils using cold, do these simple yet powerful steps:
- Set the freezer to the coolest temperature.
- Put in grain foods and other susceptible ones. It is better to directly put your food goods after purchasing it so that you will be able to inhibit weevil infestation which may probably be brought from the store storage.
- To thoroughly kill infesting weevils, store the foods for four consecutive days.
- Killing weevils with heat
In case you do not have enough space in the fridge for freezing those weevil-infested food goods, you might move to another alternative—the heat. To do this, you can use either the microwave or the oven. However, this technique should not be applied to those fine-grain goods, to avoid the risk of combustion. To kill weevils with heat, these following steps should be your guidance:
- Preheat the oven to 120°F.
- Spread the infested food on a baking sheet if you are using the oven, or spread it on a heat-resistant glass container without a lid if you are using the microwave.
- Leave it in the oven for 1 hour, or in the microwave for 5 minutes.
- Killing weevils with chemicals
Killing weevils with chemicals might only be effective for adult weevils, which hide around the corner of the kitchen shelves. This will not be applicable for treating weevils which have infested food goods since the chemicals are going to contaminate all the foods. To kill weevils using chemicals, there are some things to consider:
- Empty all the shelves before applying any weevil-killing chemicals. Make sure there are no food goods around the places you are going to treat with those chemicals.
- Spray or wipe pyrethrin-containing products to the shelves to kill infesting weevils. Do not spray or wipe it directly to the containers you are going to use for storing edible goods.
- Wait for the toxic residue to evaporate before restoring the goods.
Once you manage to get rid of infesting weevils, you will need to do every possible effort to avoid them from re-infesting your stored foods. Some actions can be done to perform this, and some of those are:
- Place a dried bay leave or clover in packed grain foods which are to be stored.
- Keep fine grain foods, such as flour in airtight containers.
- Avoid storing flour, rice, and other grain foods for a long period. You should purchase these grain foods which you will consume within a month or so to prevent possible pest infestation.
- Clean kitchen shelves regularly, especially if you have discovered weevil infestation previously. To do a regular cleaning, avoid using chemicals. Instead, here are some helpful steps to clean them naturally:
- Remove all goods from the shelves and the shelves itself if possible.
- Wipe the shelves clean with soapy water—water mixed with few drops liquid dish soap.
- Rinse with water and put the cleaned shelves under direct sunlight to dry it completely.
- Re-wipe dried shelves with eucalyptus or peppermint oil, which will deter weevils.
- Put some clover heads in the shelves before putting all the containers back in. This will discourage adult weevils and prevent them from laying eggs there.