Food supply chains and pest risks: Why is control at the point of entry essential?

In the food industry, pest management is not limited to production areas. Incoming materials, storage warehouses, transport vehicles and transit points can all become sources of pest activity or pathways through which pests enter the supply chain. A company may maintain stringent sanitation procedures at its facility and still face risks if incoming materials already contain insect eggs or stored-product insects, or provide conditions conducive to pest development.

Therefore, supply chain pest management should be implemented proactively, beginning with risk assessment at the point of entry, control at intermediate points and continuous monitoring throughout operations.

1. Why is the food supply chain vulnerable to pest activity?

The food supply chain comprises multiple interconnected stages, including sourcing areas, suppliers, transportation, storage warehouses, processing facilities and distribution systems. Each point in the chain can create conditions conducive to pest activity if appropriate controls are not in place.

Raw materials such as grains, flour, seeds, dried agricultural products and other materials of organic origin are commonly exposed to risks from weevils, warehouse moth larvae and other stored-product insects. During transportation and storage, unsuitable temperature, humidity or sanitation conditions can increase the likelihood of pest development.

For dry raw materials, the risk is associated not only with the materials themselves but also with receiving conditions, storage practices, pallets, packaging and product flow. Companies can learn more about pest management in food warehouses and logistics areas.

In addition to raw materials, transport vehicles must also be controlled. A vehicle that has previously carried pest-infested materials can become a source of cross-infestation for new consignments if it is not properly cleaned and inspected.

This demonstrates that pest risks do not arise solely within the facility; they may originate at earlier stages before raw materials enter production.

2. Pest risks in incoming materials can affect the entire production process

Incoming materials are among the critical points that require strict control within the food supply chain because they enter directly into the production process.

Some pests may be present in raw materials without being readily detected through routine visual inspection. For example, weevils or insect eggs may be present in dry materials such as grains, flour, seeds or animal feed.

Once the materials enter a warehouse or production area, pests may continue to develop when temperature, humidity and food availability are favourable.

If a company focuses only on pest treatment in production areas and fails to control risks at the point of entry, pest activity may recur even when good sanitation practices are maintained within the facility.

Supply chain pest management should therefore begin with supplier assessment, inspection of incoming materials and control of storage conditions.

3. Which points in the supply chain require pest management controls?

Pest management across the food supply chain must cover multiple points rather than focus on a single area.

The raw material receiving area should be the first point of attention. Inspecting for signs of insect activity, damaged packaging and abnormalities in raw materials helps identify risks before the materials enter storage.

Raw material warehouses are also high-risk areas because large quantities of products may remain there for extended periods. Storage conditions, stock arrangement, clearance between stored goods and walls, and area sanitation all influence the likelihood of pest activity.

During transportation, companies should consider vehicle hygiene, holding time and the risk of cross-infestation between consignments.

At the manufacturing facility, processing lines, packaging areas, finished-goods warehouses and waste-handling areas must remain under monitoring to maintain end-to-end control. Once raw materials enter the facility, the programme must continue to manage insect risks across production, storage and ancillary areas.

4. Why is pest management within the facility alone insufficient?

Many companies focus on developing pest management programmes within their facilities without fully assessing the external factors that may introduce pests into the system.

This approach can create gaps in risk management. A facility may manage its production areas effectively, yet pest activity can return if the source lies in incoming materials, transit warehouses or transport vehicles. The programme should therefore move beyond reactive treatment and adopt preventive pest management that addresses underlying causes throughout the supply chain.

For example, a food manufacturing facility may effectively control flies and other flying insects in its packaging area. However, if incoming materials show signs of weevil infestation or humidity is not adequately controlled in storage areas, the risk of pest activity remains.

Effective pest management requires the supply chain to be viewed as an interconnected system in which every point contributes to maintaining product safety.

5. How should supply chain pest management be integrated with IPM?

IPM (Integrated Pest Management) is an appropriate approach to managing pest risks in the food supply chain because it focuses on prevention, monitoring and control measures based on actual site conditions.

Rather than relying on a single treatment method after pests appear, IPM requires companies to identify risk points throughout the supply chain, monitor signs of pest activity and implement appropriate control measures.

Within the food supply chain, an IPM programme may include assessing raw material storage conditions, inspecting pest entry points, monitoring pest activity, managing sanitation and establishing response procedures for abnormal findings.

Monitoring data helps companies understand pest activity trends, identify areas for improvement and make decisions based on actual information. When managing a large number of control points, companies can track hotspots, trends and treatment histories on the PestMan Dashboard instead of manually consolidating multiple disconnected files.

6. What should companies do to reduce pest risks in the supply chain?

Companies need a proactive approach rather than waiting for pests to appear before taking action.

The first step is to assess risk points across the supply chain, including raw material suppliers, receiving areas, storage warehouses, transport vehicles and production areas.

Companies should then establish procedures for inspection, monitoring and data recording to detect abnormal signs at an early stage. Maintaining control records also helps demonstrate the company’s risk management capabilities during quality and food safety audits. These data should be consolidated into pest management reports by area, activity level, trend and corrective action to support both operations and audits.

Coordination among the company, its suppliers and the pest management provider is also essential to maintaining programme effectiveness.

See a practical application: An F&B manufacturing facility implemented a risk-based IPM programme, standardising control points, data and documentation to reduce insect incidents and support audit readiness.

7. Frequently asked questions

What is supply chain pest management?

Supply chain pest management is the process of managing and preventing pest risks throughout the food supply chain, from incoming materials and storage to transportation, production and distribution.

Why should pest risks be controlled at the point of entry?

Controls at the point of entry help identify risks associated with raw materials, suppliers or transportation before pests enter the facility and affect products.

Is pest management in production areas alone sufficient for a food manufacturing facility?

No. Pests can enter through raw materials, warehouses, transport vehicles or ancillary areas. Pest management controls must therefore be implemented throughout the supply chain.

Is IPM suitable for the food supply chain?

Yes. IPM is suitable for the food supply chain because it focuses on risk assessment, monitoring and prevention rather than treatment only after pest activity has occurred.

Supply chain pest management plays an important role in protecting food safety and maintaining operational stability. Limiting treatment to the facility after pest activity has already appeared can leave risks associated with incoming materials, storage and transportation insufficiently controlled.

An effective pest management programme should extend throughout the supply chain and combine risk assessment, routine monitoring and appropriate preventive measures.

If a company has not yet determined whether its vulnerabilities lie with suppliers, receiving areas, transit warehouses or within the facility, the first step should be to assess the risks and develop a pest management programme covering the entire operational chain.