Pesticides Banned in Nigeria and Safer Alternatives Every Farmer Should Know

There is a pesticide that was banned in Nigeria years ago that you can still buy at certain agro-chemical markets today. It sits on the shelf without a NAFDAC number, sometimes relabelled, sometimes sold loose in unmarked containers, and farmers buy it because it is cheap and the seller says it works well.

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That scenario plays out in markets across Onitsha, Kano, Lagos, and dozens of smaller towns every planting season. And the farmers buying those products are not careless people. They are hardworking men and women trying to protect their crops at the lowest possible cost, without knowing that what they are applying is dangerous enough that regulatory authorities around the world have pulled it from legal use.

This article will tell you exactly which pesticides are banned in Nigeria, why they were banned, what risks they carry for your health and your farm, and most importantly what safer alternatives are available that work just as well or better at protecting your crops.

Why Nigeria Bans Certain Pesticides

NAFDAC, the National Agency for Food and Drug Administration and Control, is the body responsible for registering and regulating pesticides in Nigeria in coordination with the Federal Ministry of Agriculture. When a pesticide is banned it is because evidence has accumulated showing that its risks to human health, animal health, or the environment outweigh its agricultural benefits.

Banned pesticides typically fall into one or more of these categories. They persist in soil and water for years after application, accumulating in the food chain. They cause cancer, hormone disruption, or neurological damage in humans with repeated exposure. They are acutely toxic at very low doses, meaning small accidental exposures during application can be fatal. They destroy beneficial insects and soil organisms that farmers depend on for healthy land.

Nigeria is also a signatory to the Rotterdam Convention and the Stockholm Convention, two international agreements that govern the trade and use of hazardous chemicals globally. Many pesticides on Nigeria’s banned list are there partly because of commitments under these international agreements.

Pesticides Banned or Severely Restricted in Nigeria

Endosulfan

Endosulfan was one of the most widely used insecticides in Nigerian agriculture for decades before it was banned. It was applied on cotton, cocoa, vegetables, and cereals across the country. It is an organochlorine compound that persists in soil for years after application, accumulates in human and animal tissue through the food chain, and causes serious neurological damage, hormonal disruption, and reproductive harm with repeated exposure.

Endosulfan was banned globally under the Stockholm Convention in 2011 and Nigeria has committed to eliminating its use. Despite this, it continues to appear in informal markets in some states. If a seller offers you a product that smells strongly of sulphur, is sold in unmarked packaging at an unusually low price, and is recommended for broad-spectrum insect control, ask for the NAFDAC registration number. If there is none, walk away.

Safer alternative: For the crops endosulfan was commonly used on in Nigeria, emamectin benzoate controls caterpillars and borers on vegetables and cereals. Lambda-cyhalothrin controls a broad range of sucking and chewing insects on cocoa and cotton. Both are registered, affordable, and widely available through legitimate agro-chemical dealers.

Monocrotophos

Monocrotophos is an organophosphate insecticide that was widely used on rice, vegetables, and cotton in Nigeria. It is classified as extremely hazardous by the World Health Organisation, meaning it can cause death or serious injury from relatively small accidental exposure during mixing or application. It has been responsible for numerous farmer deaths and poisonings across Asia and Africa.

It is listed on the Prior Informed Consent list of the Rotterdam Convention, meaning countries must be notified before it can be imported, and Nigeria has restricted its use significantly. It continues to appear in some markets sold informally under various names.

Safer alternative: Chlorpyrifos-ethyl registered formulations control the same range of pests monocrotophos was used for on rice and vegetables at significantly lower acute toxicity risk. Dimethoate is another registered alternative for sucking insects on vegetables and cereals.

Methyl Parathion

Methyl parathion is another organophosphate classified as extremely hazardous by the WHO. It was used on cotton, rice, and vegetables but causes acute poisoning through skin absorption during application, meaning it can poison a farmer who does not even realise they have been exposed. It has been responsible for deaths across African and Asian farming communities.

Nigeria has banned or severely restricted its use and it is not legally registerable for sale. Products containing methyl parathion sold in informal markets are illegal.

Safer alternative: For the cotton and vegetable pest control that methyl parathion was used for, profenofos registered products provide effective control of thrips, whiteflies, and caterpillars with a significantly better safety profile when used with basic protective equipment.

Dichlorvos at High Concentrations

Dichlorvos, also known as DDVP, is an organophosphate that in low concentrations is still used in some registered household pest control products in Nigeria. However high-concentration dichlorvos formulations sold for agricultural use are banned because of extreme acute toxicity, carcinogenicity with repeated exposure, and the fact that it breaks down so rapidly in the environment that multiple applications are needed, increasing cumulative farmer exposure.

Unregistered high-concentration dichlorvos products continue to be sold in some markets as grain storage fumigants and vegetable crop sprays. These are illegal and dangerous.

Safer alternative: For grain storage, aluminium phosphide tablets used correctly in sealed storage is the registered and effective fumigation method for Nigerian farmers. For vegetable pest control, registered pyrethroid products like deltamethrin or lambda-cyhalothrin provide effective contact control without the acute toxicity risk.

Paraquat in Unregistered Concentrations

Paraquat is a herbicide, not an insecticide, that remains registered in Nigeria at specific concentrations for weed control. However certain high-concentration paraquat formulations have been restricted or banned because paraquat poisoning, which can occur through accidental ingestion of even a small amount, has no antidote and causes progressive and fatal lung damage. It is the cause of significant numbers of accidental and intentional poisoning deaths across Africa and Asia annually.

Only NAFDAC-registered paraquat formulations at approved concentrations are legal in Nigeria. Unregistered high-concentration products sold cheaply at informal markets carry extreme risk.

Safer alternative: For weed control where paraquat was commonly used, glyphosate registered formulations provide effective broad-spectrum weed control with a significantly better acute toxicity profile. For farmers preferring to avoid herbicides entirely, manual weeding combined with mulching reduces weed pressure effectively on smallholder plots.

Aldrin, Dieldrin, and Chlordane

These are organochlorine pesticides that persist in soil for decades after a single application and accumulate through the food chain. They were used historically for soil insect control and termite management in Nigeria. All three are banned under the Stockholm Convention as persistent organic pollutants. They are not legally registered in Nigeria and should not appear in any legitimate agro-chemical supply chain.

If a seller recommends a product for termite or soil insect control that has no NAFDAC number and comes in unmarked packaging, it may be one of these compounds or a similar organochlorine. Do not use it.

Safer alternative: For termite control in farmland, fipronil-based registered products applied as soil treatments provide effective termite management. Chlorpyrifos granules are also registered for soil insect control in several crops. For structural termite management, imidacloprid-based soil treatments are widely used and registered.

How to Tell If a Pesticide Is Legally Registered in Nigeria

The simplest check is the NAFDAC registration number on the label. Every legally registered pesticide in Nigeria has a unique NAFDAC number printed clearly on the container. The format is typically a series of numbers that can be verified through NAFDAC’s official channels.

Beyond the registration number, legitimate registered pesticides will have a clear label in English stating the active ingredient, concentration, registered crops and pests, dose instructions, pre-harvest interval, safety information, and manufacturer details including a Nigerian distributor or importer address.

Products sold in unmarked containers, products with labels only in Chinese or other languages without English translation, products with no NAFDAC number, and products sold at prices dramatically lower than similar registered products are all warning signs of unregistered or counterfeit pesticides.

When in doubt, ask your state agricultural development programme office to confirm whether a specific product is on the current approved list before purchasing.

You can also read: Understanding pesticide labels for African farmers

The Real Cost of Using Banned Pesticides

The financial argument for using banned pesticides seems straightforward at first. They are cheap. They are available. The seller says they work.

But the real cost calculation looks very different when you include all the factors. Residues from banned organochlorine and organophosphate compounds in harvested produce can result in total crop rejection by buyers, particularly supermarkets and export markets that conduct residue testing. A single failed residue test can end a commercial farming relationship permanently.

Health costs from chronic exposure accumulate over years. Organophosphate poisoning causes neurological damage that presents as memory problems, muscle weakness, and coordination difficulties long before a farmer connects it to pesticide exposure. Treating those health consequences costs far more than the money saved on cheap unregistered chemicals.

Soil contamination from persistent organochlorine compounds reduces soil health for years after the last application, affecting yields across multiple subsequent seasons on the same land.

The cheap pesticide is almost never actually cheap when the full cost is counted.

Building a Safe and Effective Pesticide Toolkit

For Nigerian, Ghanaian, Kenyan, and South African farmers who want a legitimate, effective, and safe pesticide toolkit that covers the most common crop pests, here is a practical starting point using registered products available through legitimate agro-chemical channels:

For caterpillars, borers, and armyworm on cereals and vegetables, emamectin benzoate is the most effective registered option. Mix 10ml per 15 litres and apply into the whorl or onto leaf surfaces depending on the target pest.

For sucking insects including aphids, whiteflies, and mealybugs, imidacloprid 200SL applied as a soil drench at 10ml per 15 litres provides systemic control. For contact knockdown of the same pests, lambda-cyhalothrin at 5ml per 15 litres works rapidly.

For broad-spectrum contact control of mixed pest populations on vegetables, profenofos registered products used according to label directions provide reliable results with lower acute toxicity than the banned organophosphates they replace.

For organic alternatives across all pest categories, neem oil at 50ml per 15 litres remains the most accessible, affordable, and broadly effective option for African farmers working within tight input budgets.

You can also read: Neem oil pest control for African farmers

Conclusion

The banned pesticides covered in this article are not banned because of bureaucracy or paperwork. They are banned because they kill and injure farmers, contaminate food, poison soil, and destroy the long-term productivity of African farmland. The fact that some of them are still available in informal markets does not make them safe or legal to use.

Here is what to do immediately after reading this article. Go through every pesticide product currently stored on your farm and check each one for a NAFDAC registration number. If any product has no registration number, no English label, or matches the descriptions of banned compounds in this article, do not use it. Contact your nearest NAFDAC office or agricultural development programme for guidance on safe disposal.

Then build your input list for the next season using only registered products from legitimate agro-chemical dealers. The alternatives listed in this article are available, affordable, and effective. Your health, your soil, and your market access are worth protecting.

You can also read: How to safely handle and store farm chemicals

FAQ

How can I verify if a pesticide is registered with NAFDAC before buying? Ask the seller to show you the NAFDAC registration number on the product. You can verify registered products by contacting your nearest NAFDAC office or state agricultural development programme. Legitimate dealers will always have documentation for the products they stock. If a seller cannot provide a registration number or becomes evasive when asked, do not buy the product.

Are Chinese-made pesticides sold in Nigerian markets safe to use? Not all Chinese-made pesticides are unsafe, but products imported without NAFDAC registration and sold without English labels have not been evaluated for Nigerian agricultural conditions and legal use. Some contain active ingredients banned in Nigeria. Only buy Chinese-origin or any other foreign-origin pesticide products that carry a valid NAFDAC registration number confirming they have been approved for use in Nigeria.

What is the difference between a banned pesticide and a restricted pesticide in Nigeria? A banned pesticide has been completely prohibited from sale, import, and use. A restricted pesticide is still legally available but only under specific conditions, such as limited application to certain crops, use only by licensed applicators, or sale only through approved channels. Paraquat for example remains available in Nigeria in registered formulations but under restrictions that prohibit certain high-concentration products.

Is it safe to plant crops in soil where banned pesticides were previously used? It depends on the compound. Pyrethroid and organophosphate residues break down relatively quickly in Nigerian soil conditions given the heat and microbial activity. Organochlorine compounds like endosulfan, aldrin, and dieldrin persist for much longer. If you suspect your land has been treated with organochlorine compounds, contact your state agricultural development programme for soil testing guidance before planting crops intended for human consumption.

Daniel Francis

Writer, Agribusiness Operator & Pest Control Researcher

I built Findin because I kept seeing African farmers lose harvests to pests while generic advice from Western sources gave solutions that do not exist on our local shelves. I am a writer and agribusiness operator based in Abakaliki, Ebonyi State, and I also run Finedove Seed Farm.

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