Can Cannabis Become a Source of Natural Pesticides?

Cannabis is usually discussed as something farmers grow and protect. An emerging research field reverses that relationship: compounds produced by cannabis could help protect other crops. Cannabinoids, aromatic terpenes, and other plant chemicals are being investigated for their ability to disrupt pest feeding, reproduction, development, and survival.

A new review, Cannabis Phytochemicals as Emerging Botanical Biopesticides in Sustainable Agriculture¹, brings together 59 experimental studies examining this possibility. Accepted by the Journal of Natural Pesticide Research and available as a journal pre-proof, it describes substantial but variable biological activity. Most evidence remains laboratory-based, with limited field validation.

The opportunity is nevertheless meaningful. Hemp could supply ingredients for crop protection while creating additional uses for processing by-products. The question is whether that chemistry can become a consistent product that protects harvests at an acceptable cost.

Why Cannabis Compounds Can Affect Insect Pests

Plants manufacture chemicals that influence interactions with their surroundings. In cannabis, these include cannabinoids such as CBD and CBDA, terpenes associated with aroma, and various flavonoids and phenolic compounds. Their effects extend beyond the characteristics people value in consumer products.

The review describes several ways these substances may interfere with pests. Some produce direct toxicity. Others discourage feeding or egg laying, reduce reproduction, or alter development. Proposed mechanisms include membrane disruption, oxidative stress, and interference with physiological signalling, although the evidence supporting each mechanism varies.

This broader view of hemp chemistry is also reflected in a 2026 review of hemp phytochemicals in industrial applications, which examines potential uses in agrochemicals, cosmetics, and food. Together, these research directions suggest that hemp’s value need not depend on a single ingredient or market.

Pest Suppression Does Not Always Require Immediate Mortality

A useful crop-protection product does not necessarily need to kill every insect rapidly. Preventing feeding during a vulnerable growth stage, or reducing the next generation of pests, could also protect yield. Such effects fit integrated pest management, which combines monitoring, biological controls, cultivation practices, and selective treatments.

However, reduced feeding in an experiment is not automatically proof of improved harvests. Researchers must establish whether an effect lasts long enough, occurs at a practical dose, and produces measurable crop protection.

What the Cannabis Biopesticide Review Found

The review includes encouraging findings involving different cannabinoids and pest species. The examples below come entirely from the paper. They represent separate experiments with different exposure conditions, so they should not be treated as a ranking of the compounds.

These results establish reasons for further investigation, rather than ready-made application instructions. Laboratory insects can encounter compounds under conditions that differ substantially from a sprayed crop, where sunlight, rainfall, leaf surfaces, and insect behaviour affect exposure.

Another distinction matters: some evidence about individual terpenes comes from purified compounds or plants other than cannabis. It demonstrates activity in a molecule that cannabis also contains, but does not establish equivalent performance in a hemp extract. Likewise, a mixture should only be described as synergistic when experiments demonstrate an interaction beyond the expected combined effects.

Formulation Could Determine Whether Hemp Pesticides Work

A biologically active ingredient needs a delivery system. Many terpenes evaporate readily, while other constituents can degrade during storage or struggle to disperse in water. A compound that works in a controlled assay may disappear before providing useful protection outdoors.

The paper discusses emulsions, encapsulation, and controlled-release approaches intended to improve stability and delivery. These technologies could make promising chemistry more usable, but improved formulation also introduces processing costs and additional ingredients that require evaluation.

MyCannabis has explored a related principle in reporting on how terpenes influence cannabis formulation performance. Agricultural sprays and skin products have different purposes, but both demonstrate why identifying an active molecule is only the beginning. The finished formulation determines where it goes and how it behaves.

Short Persistence Creates a Practical Tradeoff

Rapid breakdown could reduce prolonged environmental exposure. However, it could also leave crops unprotected and require additional spraying. Longer-lasting formulations might improve control while changing residue patterns and exposure for beneficial organisms.

The practical goal should therefore be a suitable protection window, rather than maximum persistence. A treatment timed to a pest outbreak could have different requirements from one intended to protect a crop for several weeks.

Hemp By-Products Could Support a New Agricultural Market

One promising commercial pathway involves recovering useful ingredients from existing processing streams. The review includes work involving terpene-rich by-products from CBD production. MyCannabis reporting on industrial uses for hemp terpenes and processing residues describes the wider opportunity to extract more value from the same crop.

That possibility needs an economic qualification. An inexpensive by-product does not automatically become an inexpensive pesticide. Collection, extraction, purification, formulation, testing, storage, and registration all contribute to the final cost. Material left after processing may also vary in composition or contain too little of the desired ingredient.

A plausible starting market is a specific pest in high-value horticulture or protected cropping, where reliable crop protection can justify greater expense. This is a development pathway, not an established market outcome. The review itself notes that higher-cost botanical formulations may be more feasible in these systems than in broad-acre crops.

For developers, the most useful performance measures would include:

• Crop damage and yield under realistic growing conditions.
• Cost per treated hectare, including repeat applications.
• Batch consistency and usable shelf life.
• Effects on beneficial organisms and harvest residues.

Natural Pesticides Still Need Safety and Residue Testing

A substance capable of harming an insect pest may also affect pollinators, predators, aquatic organisms, or soil life. Natural origin does not settle those questions. A 2026 review of botanical pesticides and non-target organisms identifies a significant shortage of research into these effects.

Preserving beneficial insects is part of product performance. A treatment that suppresses aphids while harming their natural enemies could undermine the wider management programme. Testing should therefore evaluate the complete formulation, including carriers and surfactants, rather than examining the active ingredient alone.

Food-crop applications introduce further questions about residues, exposure, and analytical methods. MyCannabis coverage of the challenges of measuring pesticide residues in cannabis illustrates how complex plant chemistry can complicate reliable testing. The biopesticide review similarly emphasizes composition-specific residue data and validated analytical methods.

Legal hemp cultivation also does not automatically authorize its extracts as pesticides. Product claims, ingredients, intended crops, and application methods must satisfy the relevant pesticide framework. Consumer CBD oils cannot be assumed suitable for agricultural spraying simply because CBD appears in an experiment.

A Credible Future for Cannabis-Based Crop Protection

The strongest opportunity is to develop targeted tools that complement existing pest management. That could involve a standardized extract, a selected cannabinoid, or a terpene formulation designed for a particular crop and pest.

Progress would mean moving from impressive laboratory responses to repeatable crop protection, with acceptable safety and economics. Multi-location trials, consistent manufacturing, and clear residue data would make the case far stronger than another isolated mortality result.

Cannabis already provides a chemically diverse starting point. If researchers can turn that diversity into dependable formulations, hemp could contribute both new agricultural ingredients and additional revenue streams for producers. That is a defensible reason for optimism, provided the next stage measures what matters on the farm.

References:

¹ Fordjour, E., Manful, C. F., Asei, R., Aidoo, O. F., Mun, B.-G., Osekre, E. A., & Thomas, R. (2026). Cannabis phytochemicals as emerging botanical biopesticides in sustainable agriculture. Journal of Natural Pesticide Research. Advance online publication. https://doi.org/10.1016/j.napere.2026.100240