WEEVIL CONTROL



There are many pantry pests which can infest homes and businesses. Though Meal Moths, Grain Beetles and Flour Beetles are very common, Weevils are just as likely to be the unwanted insect in such areas. Weevils are small and easy to kill, but they can complete their life cycle quickly. Adult females will start laying eggs almost immediately so once you have some activity in a structure, it is sure to blossom into a problem which will need attention. Found throughout the world, Weevils are a pest which can be controlled like many other pantry pests. Find the route of entry, discard infested food or belongings and treat with both residual insecticides and traps.


Other pantry pests:        ANTS        BLACK LARDER BEETLES        CABINET BEETLES        CIGARETTE BEETLES        COCKROACHES        CONFUSED FLOUR BEETLES         DRUGSTORE BEETLES        FRUIT FLY        GRAIN BORERS        HIDE BEETLES        INDIAN MEAL MOTHS        LARGE ROACHES        RED FLOUR BEETLES        SAWTOOTH GRAIN BEETLES


All other pest information:       PEST ARTICLES

WEEVIL BIOLOGY

Weevils are a small insect, about 1/16 to 1/8 of an inch long. They are mostly brown to black in color and can have spots on their thorax and abdomen. As the name implies, they like rice. However, Weevils can be found eating just about anything in the home. More common food stuff they like include seeds of all types, dried beans, cotton, nuts, cereal, any wheat product, corn, flour, pasta, bread and other grain products found in any home. But their tastes don’t end in the pantry. Weevils will readily feed on cotton fabric found in furniture and clothing. Since they love dried flowers and plants, decorative ornaments found in the home such are wreathes and dried flower arrangements can harbor and feed local populations. It is not uncommon to find them living in or on Christmas ornaments, dried flower collections and stored clothing. Furthermore, adults love apples, pears, grapes and other fruits found in and around homes. Since they are great flyers, it is not uncommon for them to fly their way into any home hot on the scent of some fruit or grain.

Weevils start their life as a small caterpillar like larva which hatches on some type of food like a wheat grain, seed or nut. Eggs will hatch within a couple of days of being laid and feed immediately. Feeding will occur for 1-3 weeks and then larva will spin a cocoon in which they will pupate to an adult. Pupation takes about 1 week at which time adults will emerge. Weevils present more of a nuisance than some other pantry pests because adults feed just as much as their larva preferring a wider range of things to eat. Since they fly well and are small, rice weevils can move throughout the home easily finding all kinds of things to eat. Adult females wills start laying eggs within 3 days of emerging from their pupa cocoons. Most will lay 300-600 eggs during their 3-6 month life span. Since rice weevils can grow from egg to egg laying adult in less than one month, they can be a formidable foe in and around the home. If you suspect you have rice weevil activity, there are several things you must do to knock out current activity and insure new populations won’t quickly emerge.

 

WEEVIL TREATMENT PROGRAM

Here are the guidelines and treatments which are needed.

1) First, empty all cabinets, shelves and closets where they have been seen or thought to exist. Any food stuff which has them active must be discarded in sealed plastic bags. This will help contain them until the garbage is picked up. If you are not sure if something has activity, store it in a plastic bag and check it every week. If there are any Weevils in it they will try to get out within a few weeks. If some are found, throw it away immediately. Since this pest is temperature tolerant, don’t waste your time trying to freeze adults, eggs or larva. Though you can certainly kill some of them by freezing, you’ll need to keep the material stored in sub zero temps for a week or two to have a significant impact. The average refrigerator/freezer found in most homes gets down to just 20-25 degrees Fahrenheit. In other words, they aren’t nearly cold enough to provide a fast and complete kill. Plus, do you really want to be feeding your family something that’s laced with dead rice weevils? Probably not. In most cases, it’s best to discard anything found to have live activity. This insures you won’t be feeding family members a mouthful of bugs.

 

WEEVIL MANAGEMENT AND TREATMENT OPTIONS

Once the infested product is discarded, you’re just about ready to treat. We always suggest that you first vacuum of all the closets, shelves, cupboards, pantries and baseboards about to be sprayed. This definitely will remove eggs which are too small for the eye to see. Weevils lay eggs with a glue like excretion which helps to attach them to surfaces where food is likely to be available. This helps to keep them in place and vacuuming will help to remove some.

 

WEEVIL AEROSOL SPRAY

PT-PhantomD-Force2) Once everything has been removed from the cabinets and they have been vacuumed, you can start treatments. The first product need will be either DFORCE AEROSOL or PHANTOM aerosol. These are ready to spray in a spray can that has an included straw attachment which makes it ideal for applying to cracks and crevices where both adults and larva like to reside. Dforce kills immediately but has a slight odor and can appear “wet” on reflective, hard surfaces. Phantom is odorless and goes on “dry”. But Phantom also takes longer to work. Basically this is by design; since it takes 2-3 days to kill insects it’s able to be spread around the colony which in turn results in better results.

D-ForceD-Force:  http://www.bugspraycart.com/insecticide/aerosol/d-force-14-oz-aerosol

PT-PhantomPhantom Aerosol: http://www.bugspraycart.com/insecticide/aerosol/pt-phantom-17-5oz

 

Be sure to get as many as you have – not just where you think beetles may be hiding. Weevils are small, fast and quick to hide when ever people are around disturbing where they have been feeding. Many will go unnoticed and missed so it is best to treat every cabinet to be sure you get proper coverage. Let the treatment dry for 1 hour and all dishes and food stuff can then go back away without hazard to people or pets.

 

WEEVIL LIQUID SPRAY

D-FensePermethrin3) Now that the cabinets and pantry areas have been treated, you may have to treat other areas of the home if activity has been noted. Laundry rooms, garages, basements and other areas where pet food and grain products like grass seed are stored are prime locations for Weevils to reside. One or two rooms like this will be easy to treat with Dforce but if you have several which need an application, get some of our PERMETHRIN or DEFENSE SC which will be a better way to treat when you have to cover a large area. Apply either with one of our PUMP SPRAYERS which will allow you to get good coverage quickly.

PermethrinPermethrin 10:  http://www.bugspraycart.com/insecticide/liquid/permethrin-10

D-FenseD-fense SC: http://www.bugspraycart.com/insecticide/liquid/d-fense-sc.html

 

Gentrol VialFor extra protection, its smart to add a bottle of GENTROL to the tank mix. Gentrol is a juvenile growth regulator and will only impact eggs and larvae. Basically it prevents the larvae from maturing properly so they die before they can reach maturity and reproduce. Gentrol will outlast Permethrin 10 or Defense so you can effectively extend the length of residual and help insure faster success with less treatments needed.

Gentrol VialGentrol: http://www.bugspraycart.com/insecticide/igr/gentrol-vial

Focus in on baseboards, moldings and floor joists if accessible. Since rodenticide is one of their favorite foods, be sure to check any bait placements you have done in the last couple of years. Attics are common areas where Weevils thrive and then find their way inside living areas. If you have an attic with rodenticide, be sure to remove any suspected of feeding Weevils and treat with Permethrin to insure migrating adults won’t be able to find their way inside.

 

WEEVIL TRAPS

Trap4) Now that you have treated all cabinets, pantries, rooms and baseboards where adults may be hiding, install some of our WEEVIL PHEROMONE TRAPS in cabinets and other areas where you have or suspect activity. These traps use strong pheromones or sex attractants to lure adults and will do a good job of capturing weevils as long as you’ve done a thorough treatment with Dforce or Phantom.The treatment makes them vulnerable to the traps as it will make them weak and eager to find more food.

TrapTrap: http://www.bugspraycart.com/traps/pheromone-and-food/3pk-cf-rf-k-rw-st-pp

 

Xlure TrapAnother trap ideal for open areas is the XLURE TRAP. This trap has a protective cover on it making it ideal for sensitive areas where pets or children might be present. Xlure contains powerful attractants making it a good choice for a larger selection of insect pests too.

Xlure TrapXlure Trap: http://www.bugspraycart.com/traps/pheromone-and-food/xlure-beetle-trap

 

And once they crawl or fly into the holding tray, the thick catching oil will hold them for good. Set these traps in the back of any shelf or cabinet area. They are quite discreet and easy to conceal but the beetles will assuredly find them. Be sure to place some in any room where activity has been noted and as a general rule, try to get at least one per shelf. These traps will remain active for 1-2 months quite well. However, you will need to replace them once they fill with insects so be sure to inspect them weekly if you have had a lot of activity.

Weevils can be a persistent pest once they are established in the home. To break their life cycle, you will need to remove any food which is infested. Next, clean and vacuum all cabinets or closets where they have been found. Treat with Dforce Aerosol to kill off hatching larva and migrating adults. The Dforce will provide several weeks of protection should any new eggs hatch or if any new adults come into the area. Plus, it’s important to treat with the Dforce to get the traps working. Now if you have weevils throughout the home, treat with the Permethrin to get better coverage. Finally, set some of the Pheromone based traps out in cabinets and pantries where activity has been noted. Be sure to keep the traps fresh so they are always helping by catching adults before they mate and try to reproduce. This program will help to break the cycle so that it will eventually run it’s course and disappear.


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Comments on WEEVIL CONTROL Leave a Comment

February 27, 2012

sipho @ 6:17 am #

How do you treat weevils in a shed or warehouse filled with maize grain bags. Where the maize is already affected but can not be discarded and needed to feed people?

March 5, 2012

fabric @ 4:39 am #

Recommendations on how to treat fabric? Infestation started in a bag of wheat stored in same cupboard as various fabric types, they have spread throughout (but don’t seem to be feeding on fabric)

Thanks.

March 28, 2012

Bedroom @ 9:51 pm #

3 days ago I found weevils in my dog’s food kept in the garage on the 1st floor. However, I first noticed them in my bedroom on the 2nd floor. They seem to like the sunny areas on the carpet. How can they get up there and how do they survive? We never eat food on the 2nd floor of our home. I’ve cleaned out my cupboards and have tossed everything. What can I do to keep them out of my bedroom and why are they going there?
Thanks!!

June 22, 2012

Rice Problem @ 8:16 pm #

Currently I am having an issue with rice weevils which have infested my rice bags. These bags are currently being stored within one of my bedrooms and one bag in the kitchen. After several days I noticed increasing activity of these bugs as they became more and more noticeable within the bedroom crawling all over the mattress and pillows. As for downstairs, I haven’t noticed any activity as of yet which is great news.

I am concerned as to whether I should dispose of the rice or treat it as I have stored quite a large amount. I would also like to seek guidance on how I should approach the problem so that I can quarantine it.

Thank you.

June 23, 2012
July 11, 2012

Anne Marshall @ 2:02 pm #

For three summers in a row, my house is covered with bean weevils. I spend considerable time sweeping them up and ousting them. They are not originating inside the house, but I fear they will lay eggs inside. All grains, flours, fruit, etc. are locked up tight and clean.

I suspect they are laying eggs in the gardens around the house.

What can I do?

July 13, 2012

Sandra Heffner @ 1:55 pm #

My son brought a bag of corn feed into his room and the weevils started coming out of the bags. We removed the bag of feed and sprayed with black flag and raid. Is there any other thing else we can use? I have found them all over my house.

July 18, 2012

Maria V. @ 5:47 pm #

We got weevils in our pantry from a bag of gabanzo beans that was just 1-2 wks old! We threw almost everything out, but did keep a few things like canned goods and inspected other items and have them in containers now just in case. We cleaned it thoroughly per your and other sites instructions and haven’t put anything back in the pantry. We haven’t seen any weevils there in a few days but I have found one in our dining room (next to kitchen where pantry is) and living room (also next to kitchen). We have a 14 mos old girl that crawls and walks all over and haven’t considered sprays or insecticides. Is there anything safe to use with a baby??? Thanks!

humnbird @ 7:52 pm #

Thanks. Was treating for gnats found in and around house plants. Was great to be guided to the real problem. Checked the pantry. WEEVILS

July 19, 2012

Maria V. @ 8:28 am #

Great. Thank you. I will try these options.
@Tech Support:

July 25, 2012

Christie @ 10:21 am #

After returning from vacation we started to notice these little brown bugs randomly around the house, some dead, some alive. After researching them on the internet, I have determined that they are weevils. I don’t know where they are coming from. I have thrown out anything in the pantry that they could possibly have gotten into. I really don’t think that’s where they’re coming from though. I have seen very few of them in the kitchen and those were walking across the floor, not in the cabinets. They are mostly in our living areas, which are connected to our front and back doors. I have noticed them on the outside of the window in both of these areas. Could these be acorn weevils? We have a lot of oak trees. I really feel they are coming from outside, but why would they be coming in the house and how do I get rid of them? I would appreciate any advice you could give.

July 29, 2012

tina acton @ 4:31 am #

Came home after being gone for 21 days to little brown moths all in my pantry. Lots of them . Are these weevils? Can’t even open the pantry door. Help me please.

November 13, 2012

Lauren @ 10:23 pm #

Help!! I am manufacturing wheat bags and have just found weavles inside a bag of wheat I was going to use. What is the best way to treat the wheat before I start filling the wheat bags?

November 14, 2012

Cece @ 1:09 am #

I desperately need your advise! I’m so tired of throwing out bags of rice, flour or cereals when ever I find a weevel in them. I feel guilty about the waste but am disgusted at the site of the bugs in my food products and even more disgusted when I realize I might have eaten some. lol My husband is from Africa and tells me that weevels are common there and not considered disgusting if you happen too eat one or two or three or four. lol He makes me feel guilty for throwing away food and not having the stomach to finish a meal after the weevels have been spotted. lol What I want to know is if I eat them can I get sick and do they pass any disease or germs such as roaches? I had never heard of weevel free products till I read your site. Where can they be purchased? And can weevels still reenter those packages if say the pantry has weevels? Also where can the sprays and traps to kill them be purchased? Please help!!! Thank you.

January 10, 2013

Vashawn @ 2:15 am #

What is the life span of them? I’m finding them dead prior to treating the problem.

Vashawn @ 2:17 am #

I found one in my bedroom and laundry room will I need to throw out my clothes or just wash them?

June 5, 2013

diana @ 10:32 am #

I keep a very clean home and I have not been able to find how the weevils could have possibly invaded my home. I try to keep most foods weevils could invade in the fridge and everything else is in vacuum sealed containers. I live in an apt so is it possible they are migrating to me from someone elses apt? I am now finding them in all rooms and I don’t know how to get rid of them. Is permethrin safe to use on my floors even though I have a crawling baby at home? if not what is safest to use all over the home with a baby around?

October 18, 2013

Monica @ 9:19 am #

Hey there, I recently found a bag of oatmeal forgotten at the back of the cupboard and it was absolutely full of rice weevils. Unfortunately there are 4 cupboards where I keep everything from rice to cookies and they are all connected to where the bag of weevils was so the pesky bugs infested everything else. I’ve cleaned everything, tossed every open bag, transferred everything to glass containers or thick ziplock bags but there are many weevils hiding on the cracks of every cupboard. I see them walking around but can’t reach them and my fear is that there might be live eggs hiding in the cracks too!

My question is about the sprays like Phantom and Permethrin that you guys suggest. I have a 3 and a 5 year old and I need to treat places where we store our food but also I’ve seen weevils on our living room couch. Is it safe to have that applied to the crevices of the couch?!?!? How long after I apply any of the bug sprays can I put my food back into the cupboards and let my kids get back to lying on the couch?!?!?

What do you suggest I do?!?!? Which of the sprays should I get, with my kids in mind? Thank you so much!

October 23, 2013

Disgusted @ 1:30 pm #

Two weeks ago I found a few weevils in our laundry sink in the basement. Then a few days later I found the source where they were coming from: corn bags with holes about 10 feet away from the laundry sink. The past two weeks I have been battling these weevils non stop in our basement. Our basement is mostly used for storage. Am I going to have to move every plastic container, box, etc. and clean everything in and around to get rid of these weevils or will they eventually die off without the food source? Please help!

Disgusted @ 2:35 pm #

Thank you for your response! I have been vacuuming and cleaning pretty much every night and there still seems to be live weevils “coming out of the woodwork.” Should I remove all items in the basement (get one of those outside storage containers for the time being) and then spray as suggested?

What do these weevils feed off of if the corn bags and no other food is stored in the basement?

December 21, 2013

Scott @ 10:18 pm #

Weevil’s in shower. We have what appears to be weevils in a shower in our home. I had my wife take them to a pest control place and they identified them as weevils but said it does not make sense for them to be in the shower. I just looked through images of them and it sure looks like they are weevils. WHY would we have them in a bathtub/shower? We are having trouble eliminating them. Is there another type of bug that looks like a weevil that makes more sense in a shower?

December 22, 2013
September 30, 2014

Patty @ 12:25 am #

Just recently I have found weevils in my car. They seem to be in all the little crevices where vacuum pieces just can’t get to. We vacuumed the best that we could but can’t seem to get rid of all of them. Is there anything that I can do?

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