What we deal with
The rice weevil and maize weevil are the usual culprits in whole grains, rice, maize meal and samp, and the larvae develop hidden inside the kernel. Red and confused flour beetles feed on flour, bran, cake mixes and broken grain, and the sawtoothed grain beetle gets into cereals, oats, dried fruit and nuts. The cigarette beetle and drugstore beetle are small, round, reddish beetles that turn up in spices, dried herbs, tea, pet food and even tobacco. Indian meal moth larvae spin silk webbing through muesli, nuts, birdseed and pet food, and are the moths you see flying out of the pantry. Khapra beetle is a serious quarantine pest worldwide, and any suspected find in a commercial store should be reported rather than treated quietly.
Signs to look for
Tick every sign you have noticed. It takes ten seconds.
Why it matters: Infested food is contaminated with insect bodies, cast skins, droppings and webbing, and it has to be thrown out, which adds up quickly for a bakery, mill or food distributor. A single infested bag can spread to the rest of a pantry or storeroom, so losses grow fast if nobody checks. For manufacturers and exporters, an infestation can mean rejected consignments, failed audits and customer complaints. Some stored product beetles also cause damp, mouldy pockets in bulk grain, which encourages further spoilage.
How we treat it
The first and most important step is finding and removing every infested product, because no treatment works while the insects still have food. Shelves, cracks and crevices, and the gaps behind and under cupboards and racking are vacuumed out to remove spilt product and eggs. We then apply a targeted residual treatment into cracks and crevices, and an insect growth regulator where the pest is a moth or beetle that keeps cycling through. Pheromone traps for moths and beetles go in to monitor for survivors and new arrivals. In warehouses, mills and food factories, larger infestations of bulk commodities may need fumigation, which we plan and carry out separately under the right controls.
- Identify the insect
Beetle, weevil or moth, each points to different foods and hiding spots, so we confirm the species first, often from a WhatsApp photo.
- Find the source
We open and inspect stored products, shelving, racking and dead spaces to find which items are infested.
- Map the spread
We work out how far the insects have moved through the pantry, storeroom or warehouse.
- Clean out and treat
Infested stock is removed, the area is vacuumed, and cracks, crevices and shelving are treated.
- Monitor
Pheromone traps are placed to catch survivors and give early warning of any new infestation.
- Report and recommendations
You get a report with stock rotation, storage and hygiene recommendations, which is useful for food safety audits.
Things most people don't know
A lot of people think pantry insects mean a dirty kitchen. In reality they nearly always arrive in a packet from the shop, so even a spotless pantry can get them.
The first thing a technician does is open things. We check the birdseed, the pet food, the forgotten bag of lentils and the spices, because that is where the source usually hides.
Throwing out the infested packet but leaving the shelves as they are is a common mistake. Eggs and larvae sit in the crumbs in corners and shelf joints, ready to start again.
When it peaks in Cape Town
Stored product insects breed faster in warm weather, so infestations that started quietly in winter often become obvious from November through to March. In Cape Town's dry summers, warm pantries next to ovens and geysers are particular hot spots. In heated warehouses and bakeries the problem can carry on all year.
DIY or call a professional?
In a home pantry, throwing out infested food, a thorough clean and sealed containers fixes most problems, and we will happily talk you through that over the phone. Spraying insecticide in a cupboard full of food is a bad idea, so please do not. Where you need a professional is when the insects keep returning after a clean-out, or when you have a commercial store, bakery or factory where losses and audits are at stake.
What affects the price
For homes, the cost depends mostly on how big the pantry is and how far the insects have spread into other cupboards. For commercial sites, the size of the storage area, the type of commodity, the level of infestation and whether fumigation is needed all affect the price. Food businesses that need regular monitoring and audit paperwork are usually best on a service contract, and we quote free after an inspection.
Preventing it coming back
- Move flour, rice, cereal, pasta and pet food into sealed glass or hard plastic containers as soon as you get them home.
- Buy dry goods in amounts you will use within a month or two, rather than letting big bags sit at the back of the cupboard.
- Put new bags of flour or grain in the freezer for a few days if you have had weevils before, which kills eggs inside.
- Wipe and vacuum pantry shelves when you restock, paying attention to corners and the gaps behind shelf supports.
- Store birdseed and pet food away from the kitchen, as these are common sources of pantry moths.
- In commercial stores, rotate stock on a first-in, first-out basis and keep pallets off walls so you can inspect behind them.
Frequently asked questions
Where did these insects come from?
Usually in a packet of food bought already infested, often in small numbers you could not see. They then spread to other products in the cupboard.
Do I have to throw everything away?
Throw away anything infested and anything open that is close to it. Unopened tins and sealed jars are generally fine once wiped down.
Can I spray inside the pantry?
We would not recommend it. A thorough clean-out and sealed storage do more, and any residual treatment should be targeted into cracks, not sprayed over shelves that hold food.
Are these insects harmful if I eat them by accident?
They are not known to be dangerous in small amounts, but infested food is contaminated and should not be eaten or sold.
What are pheromone traps?
Small sticky traps baited with a scent that attracts a specific moth or beetle. They show whether the insects are still around and help us measure how well the treatment worked.
Do you work in warehouses and food factories?
Yes. We do inspections, crack and crevice treatment, pheromone monitoring and scheduled visits, with reports you can use for food safety audits.
Stored Product Pest Control by area
We cover all of these suburbs from our base in Brackenfell. Pick yours for local advice.
