Tag Archives: stored product pests

Chelle Hartzer, Orkin
Bug Bytes

Stored Product Insects Are Costly Consumers

By Chelle Hartzer
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Chelle Hartzer, Orkin

How much can pest issues cost? The truth is, it changes based on the pest, the size of the population and the prevalence throughout your food processing facility and products. If you want to protect your bottom line, you need to know which pests are the biggest threat and take steps to prevent them. Let’s focus on one major threat to food processing facilities: Stored product insects.

Believed by some pest control providers to be the costliest pests for food manufacturing and processing businesses, stored product insects can put a huge dent in your profits. What’s worse, these pests can be tough to discover by an untrained eye, and they’re incredibly difficult to control without the help of a pest management professional.

According to the USDA and the University of Wisconsin, “stored product pests can damage, contaminate, or consume as much as 10% of the total food produced in the U.S. alone, while in developing countries that rate has been estimated at 50% or more.”

That’s an astronomical figure for such small insects! Can you imagine the impact on your bottom line if 10% of your product was ruined?

For any business in need of an updated prevention plan, the first step is to review the current integrated pest management (IPM) program to ensure a proactive approach has been implemented to monitor for, and react quickly to, any pest issues around the facility. There’s no one-size-fits-all strategy for an IPM program; each program should be customized to meet the needs of the individual business. Different geography, construction and food products being produced can all create different pest pressures.

According to another study conducted by CEBR on the impact of pests on the global food supply, disruptions caused by pest infestations resulted in $9.6 billion in operating costs in the countries surveyed and 84% of U.S. businesses reported a net impact on revenue due to pest infestation across a five-year period. Diving deeper, 28% of food manufacturers and processors reported pest-related costs associated with contamination of raw materials leading to replacement costs.

In other words, having stored product insects around is expensive. If there were ever any doubts about the value of a proactive IPM program, these statistics prove it. So, let’s take a closer look at how you can work to protect your business against stored product insect—some of the most likely and costly invaders.

Types of Stored Product Insects

The term stored product insect covers a range of insect species that can be broken up into three main subcategories: External feeders, internal developers and secondary feeders. Each category has its own distinct characteristics, which are important to know for detection and proper identification.

External Feeders

This group develops on the outside of products, including damaged grains and processed foods. As they feed, they damage product and leave behind frass (insect droppings) as they make their way through.

Some of the most common external feeders include Indian meal moths and flour beetles.

Adult Indian meal moths are roughly 9 mm long and have a wingspan of 14–20 mm. The front wings on the adults are bicolored, with two main tones: Reddish-brown at the wing tip and silver-grey at the base. If you don’t see the pest itself, you may notice a messy silk webbing spun by the larvae.

Red and confused flour beetles, two of the most common beetle species, are 3–4 mm in length and also have a reddish-brown color. They’re rectangular-shaped beetles and can often be found in grain bins infested with internal developers. This is because flour beetles like to feed on the kernels other stored product insects, like borers, have already broken up. They can also be found in processing lines and finished products.

Internal Feeders

Internal feeders lay eggs inside or outside of kernels of grain but develop entirely inside those kernels. As they develop, they hollow out the kernel, then the adults can go on to damage other kernels.

Some of the most commonly encountered internal developers are lesser grain borers and rice, maize and granary weevils. Weevils measure about 5 mm in length and are usually brown in color with a distinct elongated “snout.” Lesser grain borers, the most common internal feeder across the United States infesting wheat, are a bit smaller and don’t have the snout that weevils do. Both weevils and lesser grain borers have pitted patterns on their bodies, and all can fly except the granary weevil. As the larvae and pupae develop inside grain kernels, damage becomes especially evident when the adult chews out and leaves a distinctive perfectly round hole.

Secondary Feeders

This group typically eats from the outside in and feeds on the mold and fungus that can grow on out-of-condition grain and damp product.

Two of the most common secondary feeders are the foreign grain beetle and sawtoothed grain beetle. Foreign grain beetles love mold, and resemble flour beetles in size and color. To tell them apart, look for two “bumps” on the top corners of the thorax. Eliminating molds and damp conditions that facilitate mold growth is generally enough to help prevent infestations from secondary feeders.

Sawtoothed grain beetles can feed on many types of products and while they can’t physically penetrate packaging, the adults will find holes less than 1 mm in diameter, lay eggs, and the larvae will squeeze through the tiny openings to get to the product. They prefer processed food products like bran, chocolate, oatmeal and even pet foods, but will feed on whatever they can access. Sawtoothed grain beetles are smaller than flour beetles (3 mm) and have distinctive “teeth” on the margins of the thorax.

Prevention, Monitoring & Detection, and Removal

The best way to protect a facility from stored product insects is to employ numerous different tactics. Specifically, it’s important to proactively mitigate pest attractants, monitor for activity in key areas around the facility, and establish thresholds and action plans when pests are detected.

First and foremost, educate all employees about the pests most common around your facility and what to do should they spot one. Your pest sighting log is a great tool, but only if people use it! Have a clear escalation plan for any pest issues spotted. In addition, create a sanitation schedule to ensure all areas and equipment are cleaned to remove food and moisture buildup attractive to pests on a regular basis. While you can’t possibly eliminate all food (you are of course storing and processing food!), the aim is to minimize the amount and the access these insects have to that food source.

Next, make sure all incoming shipments and packages are inspected closely in a sealed off unloading area away from other products. Make sure employees know to check for signs of damage, especially holes caused by boring pests. Taking the time to inspect anything entering your facility in this way will give you a chance to spot pests before they have the chance to spread to your other products. Use the first-in, first-out (FIFO) approach for all goods to ensure older product doesn’t sit. The longer product sits, the more chance it can be infested and it may start deteriorating, and this is especially attractive to stored product insects.

For ongoing monitoring, talk to a pest management professional about deploying pheromone traps strategically around your facility. Pheromone traps are the best tool to monitor for stored product insects, as they will give you an idea of which pests are present, in what numbers, where they are, and they can help you track trends in pest activity over time. If any stored product insects are ever spotted, contact your pest management professional immediately. If there’s a chance of having stored product insects on your product, you absolutely should have pheromone trap monitoring in place.

The Total Cost of Stored Product Pest Problems

The impact of pest issues caused by stored product insects isn’t limited to the cost of paused operations and replacing contaminated product. These pests are tough to spot, and could be passed along to partners further down the supply chain. Naturally this could hurt the trust between supply chain partners, which is never a good thing!

If your facility gets a reputation of having problems with stored product insects, it’s going to hurt your brand—and that’s going to be another knock to your bottom line. Stored product insects can spread quickly between products placed closely together. So, if pests are mistakenly shipped to a partner’s facility or a store and then on to a customer, now THEY are going to have to deal with stored product insects, too. Being proactive is the best approach, and careful documentation can help you and your supply chain partners track pest issues to the source so they can be resolved quickly and minimize the impact on profits.

It becomes easy to see stored product insects can cause both short-term and long-term effects on the profitability of a business. Don’t let that be your facility and your reputation! Be proactive and partner with a pest management provider to help ensure your facility operations run smoothly and your customers stay happy.

Chelle Hartzer, Orkin
Bug Bytes

Minimize the Risk of Pests by Maximizing Your Staff

By Chelle Hartzer
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Chelle Hartzer, Orkin

If you were given the option to run a long-distance relay race, would you select four runners to split up the distance or would you choose to run it alone? That’s a no-brainer—you’d pick four runners to give yourself the best chance of success every time!

Apply the same mentality to your food safety program, and (by extension) your pest management program. The only way you’re going to be able to effectively monitor an entire facility is by establishing a team to help. Otherwise, that’s a lot of ground for just one person to cover.

As a food processing facility, you probably already have an integrated pest management (IPM) program in place. But does your staff know the telltale signs of rodents or stored product pests? Would they be able to spot cockroaches crawling around in your facility’s storage area? The earlier you can spot a pest problem, the quicker it can be resolved before it turns into a major issue that could prove costly.

Staff training is the best way to get everybody on the same page when it comes to pest management, because pests are great at hiding and living in hard-to-reach locations. It takes a trained eye to spot certain pests, and informed employees can be a great help to this.

Before you begin staff training, you will want to identify all of the areas both inside and outside of your building that are at high risk for pest issues. Schedule a meeting with your pest management provider and make note of the high-risk areas and the most common pests your facility may be prone to. Once you’ve determined these high-risk areas and the best tactics to protect against them, employee training is a logical next step.

The bigger your facility, the tougher it is to manage all of the different potential hot spots. Everybody knows this, but few consider what this means for their pest management programs. Creating an educational pest program for employees is critical to protecting your facility. The employees are on the ground level and are often the most likely spot the early signs of a pest problem.

Step 1: Start with the Basics

When beginning staff training, make sure employees understand the IPM program in place and how it works in your facility. Many pest control providers offer complimentary employee training, so reach out to your provider about on-site training sessions. As employees learn more about what each tactic does to prevent pest issues, they’ll get a better understanding of why pests get into the facility in the first place. Once informed, they can use this knowledge to help reduce potential risk factors such as standing water from a leak, food waste in processing areas and waste removal.

Here are a few telltale signs of some common pests:

  • Stored product pests: Though generally tough to spot, there are some common telltale signs you can spot on products like webbing, larvae, live adults—some of which can look like grain products—and, of course, damaged packaging.
  • Flies: If you see larvae (maggots), especially around drains and in other damp or wet areas, it’s time to act fast. Flies reproduce quickly, so small problems can escalate rapidly.
  • Cockroaches: They can be found behind or under equipment, wall voids, or any other protected area. Cockroaches will take advantage of nearly any food source!
  • Rodents: These pests leave droppings constantly, so watch out for tiny pellets. Rodents are constantly gnawing, so if you see any products with gnaw marks, that’s a good indication that rodents may be present.

A pest management provider can identify what challenges are unique to your facility and which areas are most likely to experience pest activity. Employees are going to be a crucial part of this process, so they will need to know where to look.

Step 2: Designate Roles

Employees are the eyes and ears of your business. Whether it’s pest problems or any other issues at your facility, your staff is probably going to notice issues before management does. Once they know the pests to look out for, they can also keep an eye on:

• Cracks and openings: Any opening that leads from the inside to the outside may allow pests in.
• Sanitation issues: From large bins of food waste, to break room trash cans, let them know to report when these are overflowing or need to be cleaned.

The key is once employees know what to look for, they need to know how and who to report it to. Make sure there is a pest sighting log and employees know where it is and what information to record.

Step 3: Emphasize Communication

Communication is key. We all know that. Which is why it’s so important to encourage the age-old adage when it comes to potential pest problems: “If you see something, say something!” The longer a pest issue persists, the more likely it is to turn into a costly, potentially hazardous infestation.

Consistent communication between employees, management and pest control providers benefits all parties. It ensures employees are in-the-know about important information and new initiatives while making it easier for managers and pest control professionals to stay a step ahead of invading pests. Designate a point person that employees should go to if they have something they want to talk about and make sure to utilize that pest sighting log!

Open dialogue makes it clear to employees that they are a contributing part of your IPM program. Your employees serve as the first line of defense against pests, so if they see pest activity, it’s incredibly important they feel comfortable escalating it immediately. Tell employees you want and need their input in order for your pest management efforts to be most effective. And don’t forget to solicit feedback—they might even have ideas on how to make the program better!

Step 4: Establish a Pest-Sighting Protocol

There needs to be a clear course of action for any employee who notices a pest or evidence of pests within your facility. You’re in the business of protecting your products, and many pests spread dangerous pathogens everywhere they go.

Establishing a protocol for reporting pests will keep things simple for both employee and manager, as it ensures pest problems are documented and action steps are clear. Should a pest be spotted, make sure employees know to do the following:

  • Capture pest(s) for identification if possible. Take pictures if you can’t. The better a pest management professional can see a pest, the more accurately they’ll be able to prescribe a solution.
  • Fill out a pest-sighting log and note when, where and how many pests were seen. Imagine this as a crime scene, and your pest management professional is the crime scene investigator.
  • Contact management if the issue is severe and needs immediate attention, at which point management should contact their pest management professional. The sooner everyone is on the same page, the quicker you can implement a solution to help prevent pests from compromising your products.

Even the best IPM program can’t keep out every pest trying to get into your facility, which is why it’s so important to establish a pest-sighting protocol. It might also be worth forming an IPM committee to meet on a monthly basis. It’s best if this committee includes members from each department and, if possible, the pest management professional in order to promote ongoing improvements.

Step 5: Ongoing Education

Once you’ve taught your employees the basics of how to spot pests, pest evidence, and how to proceed once they see any, training should not stop there.

Although pests stay relatively the same year to year, your facility won’t. Staying up to date with the latest information can help you proactively prevent pests before they become a threat to your operations. Review monitoring reports with your pest management professional to determine if changes need to occur to focus on new areas, or redouble efforts at a hot spot that hasn’t been resolved yet. Remember: Many pest issues take time to completely manage.

Ask your pest management partner for tip sheets, checklists and other educational materials to stay current, and share them with your employees. Also, keep in mind that different pests thrive in different weather conditions, so adjust your tips for employees seasonally so they know what to look for.

With all staff members consistently armed with the necessary information to help identify hot spots and minimize the risk of pests, you’ll be in great shape for your next audit. Just make sure to document everything being done to help proactively protect products. You’ve got to have proof of your efforts!

Zia Siddiqi, Orkin
Bug Bytes

Stored Product Pests May Be Lurking in Your Facility

By Zia Siddiqi, Ph.D.
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Zia Siddiqi, Orkin

Pests can be sneaky. Many can compromise food products without anyone realizing they’re present. This is bad news for food processing facilities where an abundance of food products can translate into high pest pressure.

Beetles and moths are two of the main offenders in this environment and are referred to as stored product pests. These creatures can cause safety and legal concerns if they find their way into products, as they are quite adept at doing. They can damage packaging and cause product contamination or alter the taste of products when they secrete chemicals from their bodies, as many do.

This is not only a concern for your business’s reputation and bottom line, but could cost you major points on your next audit. Especially under the new FSMA regulations, prevention must be the emphasis in all U.S. facilities. This represents a shift from previous regulations as the new ones require risk-based preventive controls.

Integrate pest management
Does your company have an integrated pest management plan? Image courtesy of Orkin

The best way to prevent stored product pests and adhere to FSMA regulations is by implementing an integrated pest management (IPM) program. IPM programs focus on proactively preventing pests by inspection, monitoring and eliminating conditions that attract or harbor them using tactics like exclusion and sanitation, using chemicals only as a last resort. Under FSMA, you need to identify potential roadblocks and actively work to remove them. Showing constant improvement over time is an absolute must.

These programs also call for comprehensive documentation to monitor pest issues and ensure improvements are made over time. Auditors love to see documentation, as it shows that you are consciously working to strengthen your pest management efforts with continual improvement. If your facility doesn’t have an IPM program, it’s time to make a change sooner rather than later.

To successfully prevent stored product pests, you need to understand what they are and why they are attracted to your facility.

Types of Stored Product Pests

There are many different species of stored product pests, but they can be classified by four main categories based on their biology and habits:

  1. Scavengers: Eat just about anything, even if other pests have been there first. Pests in this category include the red flour beetle and sawtoothed grain beetle.
  2. External feeders: Feed on the exterior of cereal (grain) and kernel products and work their way inside. Pests in this category include Indian meal moths and cigarette beetles.
  3. Internal feeders: Lay eggs in the grain and feed on kernels from inside. Pests in this category include granary weevils, lesser grain borers and Angoumois grain moths.
  4. Secondary feeders: Eat from the outside in and consume moldy and damp food products. Pests in this category include spider beetles and fungus beetles.

How do you know if you have stored product pests? An infestation becomes apparent when the pests can be observed crawling or flying around. At this point, it’s important to identify the specific species that is plaguing your facility, as this will dictate the appropriate treatment method.  A trained professional can help correctly identify the species and recommend the best course of action to resolve the problem. Stored product pests reproduce quickly, so it’s critical to address any infestations before they have time to multiply and contaminate additional product.

The most common stored product pests are:

  • Sawtoothed Grain Beetle. Can burrow directly through boxes and packaging, so even sealed foods are at risk. They prefer processed food products like bran, chocolate, oatmeal, sugar and macaroni.
  • Indian Meal Moths. One of the most common pests for food processing facilities, the larva feeds on a large variety of different products. Some distinctive signs of an infestation are silk webbing and frass near the surface of the product.
  • Cigarette and Drugstore Beetles. Also able to chew through packaging, these beetles prefer pet food, spices, tobacco and any packaged food.
  • Granary and Rice Weevils. Prefer whole grains or seed products like popcorn, birdseed and nuts. They are recognizable by a snout protruding from their head and their reddish-brown bodies. Grains infested by weevils will be hollow and have small holes.
  • Spider Beetles. Similar to small spiders in appearance, they prefer grains, seeds, dried fruits and meats. They often accompany a rodent infestation because they prefer grain products that are old and moist.

Prevention Tactics

To help prevent stored product pests, incorporate the following tactics as part of your IPM program:

  • Closely inspect incoming shipments and packages. Look for the signs of stored product pests, like webbing, larvae and live adult insects. Check for signs of damage, especially for holes that can be caused by boring pests. To monitor for pests entering in this way, a quality assurance sample should be placed in a closed, labeled plastic container for later observations to see if any activity is noticed. This will give you a better idea if pests are present and what types may be being introduced via the incoming shipment.
  • Use of pheromone traps. These are the best tool to monitor the pest activity. These traps can also be placed in transportation vehicles to see if the trucks have a resident stored product pest population.
  • Use temperature as a repellant. Most stored product pests cannot live in extreme temperatures. If storage rooms can be maintained at 60°F or lower, stored product pests won’t be able to establish themselves inside.
  • Practice the first-in, first-out (FIFO) approach for products. Deteriorating products are an invitation to stored product pests, so make sure that older products go first and remove any with damages. It is also best to store products off the floor and more than 18 inches from walls, as it makes it easier to clean the surrounding area.
  • Create a sanitation schedule. Keeping a facility free of food debris will go a long way in eliminating attractants for pests. Clean up product spills immediately, and vacuum and wipe down everything on a regular basis. Don’t forget the cracks and crevices!

Keep in mind that being proactive is an important part of this entire process. If you see something, say something. Resolving pest issues as quickly as possible will be beneficial in the long run, as infestations are naturally more difficult to remove and could cost your facility dearly during an audit. A pest management professional will be able to point out the hot spots around a facility and can help to ensure that proactive prevention tactics are in place before anything gets out of hand. If any products are compromised, discard them immediately.

Pest Management: A Team Effort

The stakes are high in the food processing environment, which means pest control must be a priority. The most successful pest control programs are a team effort. Form a strong partnership with your pest management provider and work closely with them throughout the year to proactively prevent pest problems. Reach out to them early and often if you suspect any issues.

It’s also important that your entire staff is aware of pest management initiatives and tactics, which is why many pest management providers offer free staff training courses upon request. Take advantage of the resources available through your provider.

Working with a pest management provider to create a customized, IPM plan will help prevent pests and in turn protect the quality of your products and your business.

Stored product pest, Rentokil

Product Pests Hurt Your Business

By Food Safety Tech Staff
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Stored product pest, Rentokil

Stored product insects (SPI) can cause a revenue loss of 1–9%, according to recent research by the Centre for Economic and Business Research. The following infographic outlines the impact SPIs can have, which are the world’s most expensive pests, according to Rentokil.

Stored Product Pests
An infestation of stored product pests can also lead to foodborne illnesses. Infographic courtesy of Rentokil