“Pyrethrum” in Peonies

Pyrethrum Radix in Alopecia

Pyrethrum flowers and pyrethroid insecticides.

The natural pyrethrins from the daisy-like flower, Tanacetum or Chrysanthemum cinerariifolium, are nonpersistent insecticides of low toxicity to mammals. Synthetic analogs or pyrethroids, evolved from the natural compounds by successive isosteric modifications, are more potent and stable and are the newest important class of crop protection chemicals. They retain many of the favorable propertie...

Pyrethrum : Nature ' s Pesticide

Pyrethrum is derived from the dried flowers of the plant Tanacetum cinerariifolium. The name given to the active insecticidal components of the dried flowers is "pyrethrins". Tasmanian pyrethrum production is among the most innovative, high-tech agricultural industries in the world. With an output that nearly quadrupled since 1996, Botanical Resources Australia (BRA) now supplies more then 30% ...

Speciation through homoploid hybridization between allotetraploids in peonies (Paeonia).

Phylogenies of Adh1 and Adh2 genes suggest that a widespread Mediterranean peony, Paeonia officinalis, is a homoploid hybrid species between two allotetraploid species, Paeonia peregrina and a member of the Paeonia arietina species group. Three phylogenetically distinct types of Adh sequences have been identified from both accessions of P. officinalis, of which two types are most closely relate...

Investigation of Tobacco rattle virus infection in peonies (Paeonia L.)

The aim of this study was to evaluate the occurrence of peony ring spot disease in the collections of foreign and Lithuanian origin peony cultivars and hybrids and to identify a causal agent of this viral disease. During surveys of ornamental plant collections grown in Lithuania, solitary instances of affected by peony ring spot disease plants have been detected in all collections surveyed. Dis...