Pyrethrum 5EC Natural Organic Insecticide 250ml - Fast-Acting Botanical Pest Control
Best for: Growers who want a natural, fast-knockdown spray for common pests without leaving toxic residue on the crop.
Our thoughts
Pyrethrins have been the go-to natural knockdown active for decades because they work fast and break down quickly, which is exactly what you want close to harvest. It's not a systemic, long-term fix on its own, but as a natural contact spray it does the job it's designed for reliably.
Pyrethrum 5EC is an emulsifiable concentrate (EC) insecticide containing 5% w/v pyrethrins, the natural insecticidal compound extracted from dried Chrysanthemum (Chrysanthemum cinerariifolium) flowers. Pyrethrins work as a fast-acting contact insecticide, attacking the nervous system of insects on contact rather than needing to be ingested, which is why knockdown is quick against a broad range of common pests.
Because it's derived from a natural plant extract and breaks down relatively quickly in light and air, it doesn't leave the persistent toxic residue associated with some synthetic alternatives, though as with any insecticide it should always be used according to the label directions for your specific situation.
How it compares
Pyrethrum 5EC sits in the natural/botanical insecticide category alongside a handful of other pyrethrin-based and plant-derived sprays.
- Compared with soap-and-oil based products like SB Plant Invigorator, Pyrethrum 5EC works faster as a knockdown spray but doesn't offer the same feeding/foliar-tonic benefits.
- Compared with other pyrethrin-based garden sprays such as those from Neudorff and Doff, the 5% concentrate strength puts it at the more concentrated, dilute-yourself end rather than a ready-to-use spray.
- As a contact insecticide rather than a systemic one, it needs direct coverage of the pest and won't offer the same lasting protection as some residual chemical treatments.
A solid, natural-origin option for growers who want quick knockdown without reaching for synthetic chemistry.
Usage guidance
Always read the full product label before use, as rates can vary depending on the pest and crop being treated.
Dilution
Pyrethrum 5EC is typically diluted at a low percentage in water to make up a working spray - check the label for the exact rate for your target pest, as this varies by application.
Application
Spray to thoroughly wet both the upper and lower leaf surfaces, since pyrethrins need direct contact with the pest to work. Pay particular attention to the undersides of leaves where many pests congregate.
Timing
Pyrethrins break down quickly in sunlight, so applying in the early morning or evening generally gives the spray more time to work before it degrades.
Technical specifications
- Active ingredient: Pyrethrins, 5% w/v
- Source: Extracted from dried Chrysanthemum flowers
- Formulation type: Emulsifiable concentrate (EC)
- Bottle size: 250ml
- Mode of action: Fast-acting contact insecticide
Who this is for
- Growers who prefer a natural, plant-derived insecticide over synthetic chemistry
- Anyone dealing with a common pest outbreak who needs fast knockdown
- Growers who want a product that breaks down quickly rather than leaving persistent residue
Best suited as a targeted treatment rather than a long-term preventative programme on its own.
Our take
This is a straightforward, no-nonsense botanical insecticide that does one job well - fast knockdown of common pests using a natural active ingredient. It won't replace a full IPM programme, but as a natural contact spray it's a genuinely useful tool to have on the shelf.
Does exactly what it should, day in, day out, for growers who want a natural option in the pest control kit.
