Persian insect powder

Definition

A botanical insecticide composed of dried and ground flower heads of Persian pyrethrum (Chrysanthemum coccineum, now Tanacetum coccineum), containing natural pyrethrins that act as neurotoxins against insects. Historically important as one of the first widely used plant-derived insecticides before the development of synthetic pyrethroids.

Etymology

From 'Persian' indicating origin from the Caucasus and Persia region, plus 'insect powder' describing its pulverized form and target pests.

Example

Before the advent of DDT, Persian insect powder was dusted onto stored grain to suppress Sitophilus weevils and applied to greenhouse crops to control whiteflies and aphids without synthetic chemical residues.

Synonyms

• Persian powder
• Persian pellitory
• pyrethrum powder
• insect powder

Related Terms

• pyrethrin
• pyrethroid
• botanical insecticide
• Persian pyrethrum
• Chrysanthemum coccineum
• contact insecticide
• stored product protection

Usage Notes

Distinguished from modern pyrethrum products by its historical formulation as crude ground plant material rather than refined extracts. The term now often used retrospectively; contemporary commercial products typically specify 'pyrethrum extract' or 'pyrethrin concentrate'. Natural pyrethrins in Persian insect powder degrade rapidly in sunlight, limiting outdoor persistence but also reducing environmental accumulation. Toxic to fish and beneficial insects including pollinators.