Even natural insecticides have toxic properties. Pyrethrum originates from a flower in the chrysanthemum family. They resemble the well-known and loved Daisy in appearance with pink and white petals. Geographically, the flower comes from South America and Africa. Interestingly, the plant is a food that some insects such as moths and butterflies eat.
The reason that the insects that eat this plant are not affected by its toxins is due to the low dose in the plant and also the way it is presented. When pyrethrum is produced in higher concentrations, the natural ability to act as an insecticide comes into play. The nervous system of insects is affected causing the insect to first lose control and then succumb to any other product that is mixed with the concentration.
Pyrethrum alone will not kill the insect, but it is more likely to make it seek refuge from the effects, so adding another ingredient to the insecticide finishes the job. Having these other ingredients detracts from the natural feel of the product and you should always keep in mind that most commercially purchased products contain these additional ingredients. As a result, you still need to take precautions when handling products purchased and promoted as natural insecticides.
Avid gardeners use Pyrethrum to protect their vegetable garden, due to its wide deterrent range to winged and ground insects. Gardeners especially like the form of protection against insects such as aphids, cabbage worms, leafhoppers, and mites. Another surprising piece of information is that it is effective against lice, but as to whether it is recommended by medical professionals, I think more chemically induced products would be used. With this in mind, there is also a similar pest in the botanical world called plant lice; these lice can be safely dusted with Pyrethrum product.
Due to the low toxicity to humans, pyrethrum is popular as a crop dusting product and is widely used by environmentally conscious commercial farmers to help maintain their soils and produce chemical free. The natural insecticide Pyrethrum can be harmful to fish, but it is not considered a danger to animals and birds.
Having the knowledge and using it effectively is the wish of every health conscious gardener. There are many options for pest control in the natural world, but knowing which plant is effective against which insects is probably beyond most people’s understanding. Take advantage of their time and use someone else’s experience and knowledge to your advantage, seek books and advice from qualified people for the best results.