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How to Control Angoumois Grain Mothsangoumois grain moth

A pantry pest that is a troublesome problem for crop growers and agricultural farmers is a bug known as the Angoumois Grain Moth. These pests are found all over the world and like to infest crops and ears of corn in the United States. If left untreated, these pests can be a huge economic and financial threat to the agricultural industry and farmer livelihoods.

Angoumois grain moths have small wings in their front that are yellowish colored and a wingspan of 3/16 inch. A distinguishing characteristic unique to this moth is a narrow projection that extends from the tip of the back wing. Fully-grown larvae are usually yellowish-white and have yellowish-brown head about a 1/8th of an inch long.

Angoumois grain moth populations can very quickly get out of control because of how frequently the adult females lay eggs. These bugs are most prevalent during warm weather conditions.

While fresh kernels of corn happens to be their favorite food of choice, they also enjoy rice, barley, sorghum, millet, wheat and dried, shelled corn. If they happen to invade households, they like to eat popcorn kernels that are stored in pantries.

Solutions Pest and Lawn knows just how to get rid of these pesky bugs like the Angoumois grain moths and can help you to clear your pantry of them once and for all with our helpful advice and products which deliver satisfying results.

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How to Get Rid of Angoumois Grain Moths: Solutions 4 Step Process:

Controlling an Angoumois grain moths problem can be quite difficult compared to other pantry pests especially if they are infesting agricultural sites since there is worry that spraying chemicals can affect the food and crops being grown. We here at Solutions Pest & Lawn recommend a control approach which includes a combination of exclusion measures, applying control products like safe-to-use insecticides and traps as well as discarding all food infested by the offending pest. Check out our 4 step process below to learn how to properly dispose of invading Angoumois grain moths in your pantry.

Step 1:  Angoumois grain moth control starts with a detailed inspection of the suspicious areas. Identify the source of the infestation and remove the product immediately from your storage area. Properly sealing un-infested foods with tight fitting tops and lids is important to prevent further infestations. On agricultural locations corn storage cribs should be cleaned out and covered tightly when corn and crops are stored away.

Step 2:  Once the infested items are tossed out, a thorough cleaning should be done. Vacuum and sweep up areas, sucking up larvae and eggs. In households, you should vacuum shelves and surfaces and spray disinfect.

Step 3: Once cleaning and sanitation is complete, pesticide treatment should be applied. Apply a residual insecticide spray. An easy to use aerosol like Novacide Flea & Tick Killer or CB PCO Insect Fogger are excellent options then follow up with an Insect Growth Regulator Gentrol Point Source IGR, which is also available in an aerosol spray and has a crack and crevice tip for easy application. For agricultural areas we suggest using an organic natural product like Essentria IC3 concentrate and spraying in problem areas.

Step 4: Use pheromone specific traps to catch Angoumois grain moths if you are weary of using pesticides. Dispose of old unwanted food and seal all cracks and crevices with caulk and paint in your pantry to ensure no areas of harborage are available and make cleaning up a breeze.

Following these steps carefully and being meticulous in your approach will ensure you that your Angoumois grain moths problem will be a thing of the past. Browse our Angoumois grain moths eliminating products below and as always you can contact us if you are in need of suggestions or advice, we are always available either via live chat, phone or email.


Learn More About the Angoumois Grain Moth

The Angoumois grain moth is known for causing significant damage to agricultural areas where corn is being grown or stored. This pantry pest is a major stored grain pest due to the larvae stage of the angoumois grain moth developing entirely within a grain kernel.


While the angoumois grain moth can attack several grains, it is most often discovered around ears of corn and can be rarely found in shelled corn. An infested kernel is mostly hollow with a round hole through which the angoumois grain moth emerges.


The angoumois grain moth weighs about 20% less than an untouched kernel. Angoumois grain moth which infest grain usually carry an unpleasant odor so animals may refuse to eat it or limit their consumption which should be a clear sign that the corn or grain has been contaminated by this pantry pest.


The exit holes in angoumois grain moth-infested kernels are similar to those produced by grain weevils so finding adults is one way to identify the infestation. The adult angoumois grain moth is a small (1/2 inch wing spread), tan to grey moth with fringed wings and the forward portion of the hind wings have distinctive tips which resemble little fingers. Adult angoumois grain mothsdo not feed.


Grain weevils are dark brown beetles with a distinctive proboscis. Weevils and angoumois grain moth are known to infest both ear corn and shelled kernels. The angoumois grain moth and saw-toothed grain beetle often coexist when infesting corn and grain, but in other cases the grain weevil or grain borer will suppress the angoumois grain moth population.


Like most stored grain insects, angoumois grain moth infestations can begin by adults appearing in small numbers or corn that has been carried over and stored away. However, infestations can also begin in the field from angoumois grain moths laying eggs before harvest. The shuck provides protection against this insect. Regardless, moths can lay their eggs on kernels exposed due to a loose or damaged shuck.


Angoumois Grain Moth Life Cycle

Angoumois grain moths deposit their eggs in the gaps between corn kernels. Female moths typically lay about 80 to 200 eggs in a lifetime.


Once the eggs hatch, the tiny angoumois grain moth larvae immediately bore into a grain kernel, covering the hole after they enter so they can proceed unsuspected. These angoumois grain moth larvae go through three molting while feeding on the interior of the kernel. Right before the pupation phase, the mature caterpillar chews a circular hole leaving a thin film over the future exit, through which the adult moth emerges.


The entire process of this life cycle depends on temperature but typically it takes between 30 and 40 days to occur. Once they reach adulthood, the angoumois grain moth will only live for around a week and will not feed.


Preliminary Inspection and Sanitation For Angoumois Grain Moth Control

To proceed with of getting rid of angoumois grain moths you must start by conducting a detailed inspection and clean up. Start by emptying all our your pantry cabinets, shelving and closets where you have spotted them or believe have noticed angoumois grain moth activity.


You will need to go through all your boxed food and check them all for traces of angoumois grain moths. Any item where they have been spotted needs to be disposed of immediately by sealing them in a plastic bag. This will help to contain the angoumois grain moths until your garbage is taken away by the garbage man.


The smart thing to do if you find a angoumois grain moth infestation is to toss out EVERYTHING you have in your pantry and essentially start from scratch. This may sound drastic but it may be necessary so you can make sure that the angoumois grain moth will no longer from your food.  This may not sound like an appealing option but you don’t want to leave any food item to chance.


If you don’t wish to discard all your stored dried foods, then you will need to go through and carefully inspect everything (which may take quite a bit of time which is why we suggest starting your pantry over from scratch and tossing everything out as a time saving measure). Open all your boxes, even ones that are brand new and unopened and check. If there are some that you aren’t sure about, place the item in a plastic bag and seal it. If there are angoumois grain moths in the suspected item, they will try to escape after some time. In this case, toss the food item away immediately. If nothing comes out, you can safely assume that the food is not contaminated or infested.


In the case of agricultural locations where grains are stored away in cribs, thoroughly examine the crib stored corn and discard any which are infested by the angoumois grain moth. A detailed cleanup should take place and any harvesting equipment should be cleaned before reusing.


The Best Methods of Chemical Treatment for Angoumois Grain Moths

Once the entire pantry has been cleared out and you have gotten rid of the infested foods the angoumois grain moths were in, you can then move on to insecticide treatments.  


We highly recommend prior to using any pest control products that you first vacuum the entire interior of your pantry as well as your cupboards, cabinets and all other previous infested areas that will be treated.


This helps by sucking up some granary weevil eggs and pupae that may be resting in a crack or crevice as well as any crumbs or grains that have spilled which can be food for a lingering granary weevil larvae.


When laying eggs, angoumois grain moths utilize a secretion that is similar to glue which they use to protect their young, attaching them to surfaces so they won’t be displaced and close to food so when they’ll be hatched and ready to eat, the food is right there for them. Though vacuuming helps, vacuuming alone won’t solve your granary weevil problem.

Best Aerosol Spray To Treat angoumois grain moths

After doing a thorough cleanup, vacuuming and sanitizing of the targeted areas, you can then move on to chemical control. There are a number of products which we recommend for granary weevil treatment, such as an aerosol spray which can easily get into those hard to reach corners, cracks and crevices.


The first option is Novacide Flea & Tick Killer. This product contains little to no odor and works quickly. Use Novacide directly by spraying them in your pantry, cupboards, under the sink and in closets if you’ve seen them trying to eat clothing and fabric. This aerosol spray also comes with a straw applicator tip which you can attach to spray those cracks and crevices where adults and larvae commonly hideout.


Keep in mind that angoumois grain moths are very small, move quickly and hide really well when threatened. Also, since they’re able to fly, they can be difficult to find and kill on contact. That’s why this product has a residual effect. Once you spray, let the place air out and the product dry and after an hour you can place everything back in the pantry.


It may be wise to treat regularly every two weeks until you do not see any more granary weevil activity. One they are gone, you can use Novacide quarterly to keep them gone.


Now if you are not sure where the angoumois grain moths are hiding out, you could go with  CB PCO Insect Fogger. This fogging product can be set up in the pantry and will thoroughly cover all the areas where they are hiding that are hard to get to. You will need to open all cabinets and suspected areas and leave the home for a few hours as the fogging chemicals do their job and fumigate the area.


The Best Product For Treating granary weevil Eggs

Most of the insecticides we recommend will kill adult angoumois grain moths, but not the eggs. For this you will need an insect growth regulator. These work as a form of birth control, putting a halt on the development process so eggs don’t hatch and larvae doesn’t develop. We recommend Gentrol Aerosol Insect Growth Regulator.


Now it’s important to understand how Gentrol works. An IGR does not kill adult weevils, it only targets granary weevil eggs and larvae. It is essentially not a killer of eggs, it just makes it so they don’t develop and function normally. This is done so be Gentrol mimicking a vital protein the young weevils need to grow and disrupts the life cycle process. This disruption results in the stalling of their development, leading to death and making it so a new generation of angoumois grain moths isn’t produced.


Using Traps To Catch angoumois grain moths

Finally, we highly recommend installing Pro-Pest Pantry Moth & Beetle Traps for angoumois grain moths. These traps contain powerful pheromones or sex attractants to lure adult angoumois grain moths towards it. Once the unsuspecting granary weevil crawls or flies toward the trap, glue like adhesive will capture them and they are toast.


Install these traps after you have treated the area with insecticide. This is also a helpful way to monitor the granary weevil infestation. If you’ve done a good job spraying, the traps may only capture a few angoumois grain moths. If you see a lot on these traps, you may have missed a spot and should retreat the area.


Place these traps in the back of each pantry shelf or cabinet. 1 should be enough per shelf or cabinet. These products last for 1 to 2 months so you may need to replace them until you no longer have a granary weevil problem.


Prevent angoumois grain moths With IPM Practices


Once you have eliminated the granary weevil problem, don’t think that you will never encounter a pantry pest ever again. angoumois grain moths are quite a persistent pest and they may make a comeback.


To prevent this from happening make sure to don’t have too much food cluttering your pantries and cabinets. Also make sure to wipe up and clean any spills and toss away old food items that you haven’t been eating. You can spray the products we’ve suggested from time to time as a preventative measure as well as set traps to monitor future activity.


As long as you maintain cleanliness and are diligent about checking your food items, even ones you newly bought from the store, you will keep the angoumois grain moths away for good.

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