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Pyrethrum
''Pyrethrum'' was a genus of several Old World plants now classified as ''Chrysanthemum'' or ''Tanacetum'' which are cultivated as ornamentals for their showy flower heads. Pyrethrum continues to be used as a common name for plants formerly included in the genus ''Pyrethrum''. Pyrethrum is also the name of a natural insecticide made from the dried flower heads of '' Chrysanthemum cinerariifolium'' and ''Chrysanthemum coccineum''. The insecticidal compounds present in these species are pyrethrins. Description Some members of the genus ''Chrysanthemum'', such as the following two, are placed in the genus ''Tanacetum'' instead by some botanists. Both genera are members of the daisy (or aster) family, Asteraceae. They are all perennial plants with a daisy-like appearance and white petals. * '' Tanacetum cinerariifolium'' is called the Dalmatian chrysanthemum, denoting its origin in that region of the Balkans (Dalmatia). It looks more like the common daisy than other pyrethrums do. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrethrin
The pyrethrins are a class of organic compounds normally derived from ''Chrysanthemum cinerariifolium'' that have potent insecticidal activity by targeting the nervous systems of insects. Pyrethrin naturally occurs in chrysanthemum flowers and is often considered an organic insecticide when it is not combined with piperonyl butoxide or other synthetic adjuvants.Mader, Eric, and Nancy Lee Adamson. "Organic-Approved Pesticides."Organic-Approved Pesticides (n.d.): n. pag. The Xerxes Society. The Xerces Society for Invertebrate Conservation, Oct. 2012. Web. 10 Mar. 2015. Their insecticidal and insect-repellent properties have been known and used for thousands of years. Pyrethrins are gradually replacing organophosphates and organochlorides as the pesticides of choice as the latter compounds have been shown to have significant and persistent toxic effects to humans.They first appeared on markets in the 1900's and have been continually used since then in products such as bug bombs, bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrethroid
A pyrethroid is an organic compound similar to the natural pyrethrins, which are produced by the flowers of pyrethrums ('' Chrysanthemum cinerariaefolium'' and '' C. coccineum''). Pyrethroids are used as commercial and household insecticides. In household concentrations pyrethroids are generally harmless to humans. However, pyrethroids are toxic to insects such as bees, dragonflies, mayflies, gadflies, and some other invertebrates, including those that constitute the base of aquatic and terrestrial food webs. Pyrethroids are toxic to aquatic organisms, especially fish.Pyrethroids fact sheet from the Illinois Department of Public Health. They have been shown to be an effective control measure for malaria outbreaks, through indoor applications. Mode of action Pyr ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tanacetum Cinerariifolium
''Tanacetum cinerariifolium'' is a species of flowering plant in the aster family, Asteraceae, and formerly part of the genus ''Pyrethrum'', but now placed in the genus ''Chrysanthemum'', or the genus ''Tanacetum'' by some biologists. It is called the Dalmatian chrysanthemum, denoting its origin in that region of Europe (Dalmatia). It looks more like the common daisy than other pyrethrums do. Its flowers, typically white with yellow centers, grow from numerous fairly rigid stems. Plants have blue-green leaves and grow to 45 to 100 cm (18 to 39 in) in height. As an insecticide The plant is economically important as a natural source of an insecticide called "pyrethrum." The flowers are pulverized and the active components, called pyrethrins, contained in the seed cases, are extracted and sold in the form of an oleoresin. This is applied as a suspension in water or oil, or as a powder. Pyrethrins attack the nervous systems of all insects, and inhibit female mosquitoes from bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Persian Powder
:''The term Persian powder can also refer to a type of dry snow in the Zagros Mountains.'' Persian powder is an insecticide powder. It is also known as Persian pellitory and insect powder. Biological pest control Persian powder is a green pesticide that has been used for centuries for the biological pest extermination of household insects, garden pests, and agricultural pests.''Bioaromatica'The history of pyrethrum It is used indoors, in gardens and the horticulture industry, and in agriculture. It is produced from the powdered flowers of certain species of pyrethrum, plants in the genera ''Chrysanthemum'' and ''Tanacetum''. In more recent times it has had formulations with brand names such as Zacherlin. Synthetic forms Pyrethroids are synthetic insecticides based on natural pyrethrum ( pyrethrins), such as permethrin. A common formulation of pyrethrin is in preparations containing the synthetic chemical piperonyl butoxide: this has the effect of enhancing the toxicity to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zacherlin
Johann Zacherl (1814 – 30 June 1888) was an Austrian inventor, industrialist and manufacturer who made a fortune in the late 19th century selling dried flower heads of '' Chrysanthemum cinerariifolium'' as an insecticide. Biography Zacherl was born in Munich (Germany) in 1814. After finishing his studies, he left Munich to visit Vienna, St Petersburg and Odessa. He eventually reached Tiflis in the Caucasus, where he discovered villagers used a natural insecticide, Pyrethrum, against vermin. He began to develop the powder's trade with Austria in 1842. The powder received different names: Lowizachek (in Armenia), Bug Flower, Powder of Persia and Persian insect powder. After a longer stay in Tiflis, in 1855 he established his company, ''Mottenfraß-Versicherungsunternehmung Johann Zacherl'', in Vienna's 19th district, and began selling the insect repellent '' Zacherlin''. With the help of his son, Johann Evangelist, he developed the Pyrethrum product line. Zacherl died in Vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tanacetum Coccineum2
''Tanacetum'' is a genus of about 160 species of flowering plants in the aster family, Asteraceae, native to many regions of the Northern Hemisphere.''Tanacetum''. Flora of North America. They are known commonly as tansies.''Tanacetum''. Integrated Taxonomic Information System (ITIS). The name tansy can refer specifically to '''', which may be called the common tansy or garden tansy for clarity. The generic name ''Tanacetum'' means 'immortality' in |
Johann Zacherl
Johann Zacherl (1814 – 30 June 1888) was an Austrian inventor, industrialist and manufacturer who made a fortune in the late 19th century selling dried flower heads of '' Chrysanthemum cinerariifolium'' as an insecticide. Biography Zacherl was born in Munich (Germany) in 1814. After finishing his studies, he left Munich to visit Vienna, St Petersburg and Odessa. He eventually reached Tiflis in the Caucasus, where he discovered villagers used a natural insecticide, Pyrethrum, against vermin. He began to develop the powder's trade with Austria in 1842. The powder received different names: Lowizachek (in Armenia), Bug Flower, Powder of Persia and Persian insect powder. After a longer stay in Tiflis, in 1855 he established his company, ''Mottenfraß-Versicherungsunternehmung Johann Zacherl'', in Vienna's 19th district, and began selling the insect repellent '' Zacherlin''. With the help of his son, Johann Evangelist, he developed the Pyrethrum product line. Zacherl died in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tanacetum
''Tanacetum'' is a genus of about 160 species of flowering plants in the aster family, Asteraceae, native to many regions of the Northern Hemisphere.''Tanacetum''. Flora of North America. They are known commonly as tansies.''Tanacetum''. Integrated Taxonomic Information System (ITIS). The name tansy can refer specifically to '''', which may be called the common tansy or garden tansy for clarity. The generic name ''Tanacetum'' means 'immortality' in |
Tanacetum Cinerariifolium MHNT
''Tanacetum'' is a genus of about 160 species of flowering plants in the aster family, Asteraceae, native to many regions of the Northern Hemisphere.''Tanacetum''. Flora of North America. They are known commonly as tansies.''Tanacetum''. Integrated Taxonomic Information System (ITIS). The name tansy can refer specifically to '''', which may be called the common tansy or garden tansy for clarity. The generic name ''Tanacetum'' means 'immortality' in |
Chrysanthemum Coccineum
''Tanacetum'' is a genus of about 160 species of flowering plants in the aster family, Asteraceae, native to many regions of the Northern Hemisphere.''Tanacetum''. Flora of North America. They are known commonly as tansies.''Tanacetum''. Integrated Taxonomic Information System (ITIS). The name tansy can refer specifically to '''', which may be called the common tansy or garden tansy for clarity. The generic name ''Tanacetum'' means 'immortality' in |
Tanacetum Cinerariifolium1
''Tanacetum'' is a genus of about 160 species of flowering plants in the aster family, Asteraceae, native to many regions of the Northern Hemisphere.''Tanacetum''. Flora of North America. They are known commonly as tansies.''Tanacetum''. Integrated Taxonomic Information System (ITIS). The name tansy can refer specifically to '''', which may be called the common tansy or garden tansy for clarity. The generic name ''Tanacetum'' means 'immortality' in |
Insecticide
Insecticides are substances used to kill insects. They include ovicides and larvicides used against insect eggs and larvae, respectively. Insecticides are used in agriculture, medicine, industry and by consumers. Insecticides are claimed to be a major factor behind the increase in the 20th-century's agricultural productivity. Nearly all insecticides have the potential to significantly alter ecosystems; many are toxic to humans and/or animals; some become concentrated as they spread along the food chain. Insecticides can be classified into two major groups: systemic insecticides, which have residual or long term activity; and contact insecticides, which have no residual activity. The mode of action describes how the pesticide kills or inactivates a pest. It provides another way of classifying insecticides. Mode of action can be important in understanding whether an insecticide will be toxic to unrelated species, such as fish, birds and mammals. Insecticides may be repellen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
