| 单词 | Pyrethrum |
| 例句 | Pyrethrum is another commonly advertised natural pesticide alternative. Many companies advertise ‘green’ pest control. But is it possible? And does it work? 2021-04-06T04:00:00Z Pyrethrum is extracted from chrysanthemum flowers; pyrethrin is created in a lab. Many companies advertise ‘green’ pest control. But is it possible? And does it work? 2021-04-06T04:00:00Z Pyrethrum.—Composite plants of various character, but of easy culture. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 7 "Horticulture" to "Hudson Bay" 2012-03-04T03:00:13.390Z Pyrethrum, he said, would also kill all sorts of leaf-eating insects; it is now largely cultivated in California, and is hardy at least as far north as Washington. Prairie Farmer, Vol. 56: No. 12, March 22, 1884 A Weekly Journal for the Farm, Orchard and Fireside 2012-02-24T03:00:26.570Z Pyrethrum is a naturally occurring insecticide derived from the chrysanthemum; it has been used for at least 200 years. Myths: Busted - Clearing Up the Misunderstandings about Organic Farming 2011-08-15T12:45:12.733Z Pyrethrum powder, air-slacked lime, kerosene emulsion, etc., are used as remedies for lice. Farm Gardening with Hints on Cheap Manuring Quick Cash Crops and How to Grow Them 2011-05-10T02:00:58.433Z It is stated to be of the chemical family 'pyrethroids' i.e. its molecular structure is similar to those of the natural insecticides found in the famous African daisy _Pyrethrum_. Widely Used Pesticides Found to Impair Bee Reproduction 2010-03-08T23:20:00Z Pyrethrum Parthenium aureum: half-hardy, 1 ft.; grown for its golden foliage, and much used for bedding. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 7 "Horticulture" to "Hudson Bay" 2012-03-04T03:00:13.390Z Insect powder is prepared from species of Pyrethrum. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 7 "Columbus" to "Condottiere" Pyrethrum or buhach may be used in similar manner, and kerosene emulsion has been highly recommended by some experimenters. Asparagus, its culture for home use and for market: a practical treatise on the planting, cultivation, harvesting, marketing, and preserving of asparagus, with notes on its history Pyrethrum is also used largely, but it only stupefies the mosquitoes temporarily instead of killing them. Insects and Diseases A Popular Account of the Way in Which Insects may Spread or Cause some of our Common Diseases Pyrethrum, one ounce to four gallons of water; or, better still, mixed one part with about twenty parts of flour and applied while the dew is on, is an effectual remedy. The Cauliflower Pyrethrum uliginosum is a wonderfully free bloomer, growing to a height of three or four feet, therefore well adapted to the middle rows of the border. Amateur Gardencraft A Book for the Home-Maker and Garden Lover A patient seeking relief from rheumatic or neuralgic affections of the head and face, or for palsy of the tongue, should chew the root of this Pyrethrum for several minutes. Herbal Simples Approved for Modern Uses of Cure Still, to anyone with but a slight knowledge of hardy plants, it asserts itself at once as a Pyrethrum. Hardy Perennials and Old Fashioned Flowers Describing the Most Desirable Plants, for Borders, Rockeries, and Shrubberies. How anything can be gay with Pyrethrum uliginosum I cannot imagine. Punch, or the London Charivari, Vol. 159, 1920-09-29 It is similar to the Anthemis Pyrethrum, as stimulating the mouth, and is recommended in paralyses of the tongue. The Mirror of Literature, Amusement, and Instruction Volume 20, No. 576, November 17, 1832 Make it a point to keep the larger-growing kinds, such as Coleus, Pyrethrum and Centaurea, under six inches in height rather than over it. Amateur Gardencraft A Book for the Home-Maker and Garden Lover A gargle of Pyrethrum infusion is prescribed for relaxed uvula, and for a partial paralysis of the tongue and lips. Herbal Simples Approved for Modern Uses of Cure Pyrethrum.—The greenhouse kinds grow in any rich soil, and young cuttings planted under glass root readily. Gardening for the Million I have had a plant of Pyrethrum roseum in my herbaceous garden for many years past, and it holds its own without any care much better than many other things. Scientific American Supplement, No. 299, September 24, 1881 The plant is Pyrethrum cinerariaefolium and has a white blossom resembling the common marguerite. One Thousand Questions in California Agriculture Answered Pyrethrum—"Golden Feather"—with feathery foliage of a tawny yellow. Amateur Gardencraft A Book for the Home-Maker and Garden Lover To make a gargle, two or three teaspoonfuls of the tincture of Pyrethrum, which can be had from any druggist, should be mixed with a pint of cold water, and sweetened with honey, if desired. Herbal Simples Approved for Modern Uses of Cure Canna, Caladium, Ricinus, Coleus, "Golden Feather" Pyrethrum and the gray Centaurea cover pretty nearly the entire list. Amateur Gardencraft A Book for the Home-Maker and Garden Lover |
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