| 单词 | pyrethrum |
| 例句 | Meanwhile men in Serbia were known to consume a “happy porridge” aphrodisiac made from hashish, almond butter, flower petals and leaves, spices, and Anacyclus pyrethrum root. 8 ways people have gotten “creative” with pot to enhance their sex lives 2016-02-11T05:00:00Z A new study in Nature Communications finally shows how pyrethrum works, with two components acting synergistically to deter the pesky bloodsuckers. Natural Mosquito Repellent’s Powers Finally Decoded 2021-08-18T04:00:00Z The Documentary category was won by Vito Fusco, of Italy, for his series on Kenya's pyrethrum flowers, which are used as a natural insecticide. In pictures: 2021 Sony World Photography Awards 2021-04-15T04:00:00Z Seventy-two percent of OTC lice products sold in the United States contain either permethrin or pyrethrum. Debunking Super Lice and Other Myths 2015-11-25T05:00:00Z In other cases pyrethrum or tobacco powder, wood ashes, etc., have been employed against insects. Disease in Plants 2012-03-01T03:00:22Z A good example is the distinction between natural pyrethrum and synthetic pyrethroids. Myths: Busted - Clearing Up the Misunderstandings about Organic Farming 2011-08-15T12:45:12.733Z To observe pyrethrum’s effects, Dong and her colleagues attached tiny electrodes to hairs on mosquitoes’ antennae. Natural Mosquito Repellent’s Powers Finally Decoded 2021-08-18T04:00:00Z The pyrethrum may be used dry or in water, at the rate of a tablespoonful to two gallons. Farm Gardening with Hints on Cheap Manuring Quick Cash Crops and How to Grow Them 2011-05-10T02:00:58.433Z Then the canal building was thoroughly fumigated with pyrethrum powder or sulphur, and not simply the official building but every single house in the city of Panama was similarly disinfected. The Panama Canal A history and description of the enterprise If he does not edge them with blue lobelia, he edges them with some yellow stuff which I think he calls pyrethrum. The New Gulliver and Other Stories Either dust or spray with a nicotine or pyrethrum mixture as recommended on the package. A Living from the Land The team also used chemical analysis to determine how two of pyrethrum’s molecular components—EBF and pyrethrin—elicit the repellent response. Natural Mosquito Repellent’s Powers Finally Decoded 2021-08-18T04:00:00Z These yield the pyrethrum of commerce so largely used as an insecticide, and which is said to form the chief ingredients in various flea powders. Notes on Agriculture in Cyprus and Its Products A bushel of pyrethrum powder would not pepper them all or a hogshead of kerosene emulsion last long enough to get them all. The Mayflower, January, 1905 Such rooms of course require a thorough cleaning or it is sometimes possible to kill the fleas by a liberal use of pyrethrum powder or benzine or to fumigate. Insects and Diseases A Popular Account of the Way in Which Insects may Spread or Cause some of our Common Diseases Dust or spray with a prepared nicotine or pyrethrum mixture. A Living from the Land Or, they may be killed by suffocating them with a gas or by stopping up their breathing pores with some powdered substance, such as pyrethrum. The Pecan and its Culture The original pyrethrum powder came from plants growing in Dalmatia. Notes on Agriculture in Cyprus and Its Products Thus mercury internally promotes an increased salivation, and pyrethrum externally applied to the excretory ducts of the salival glands. Zoonomia, Vol. II Or, the Laws of Organic Life Previous experience with pyrethrum was not very satisfactory. Insects and Diseases A Popular Account of the Way in Which Insects may Spread or Cause some of our Common Diseases Dust or spray with a prepared nicotine or pyrethrum mixture. A Living from the Land Instead, use pyrethrum or insect powder, which may be diluted by mixing with cheap flour—one ounce of insect powder to five of flour. Ontario Teachers' Manuals: Nature Study The remedy prescribed is a powder in which pyrethrum is the chief ingredient, sprinkled about the shelves. A Book for All Readers An Aid to the Collection, Use, and Preservation of Books and the Formation of Public and Private Libraries After the cabbage has headed, it is very difficult to destroy the worm, but pyrethrum insect powder used freely is helpful. Agriculture for Beginners Revised Edition If the dry pyrethrum powder is blown from a bellows into a tightly closed room, it is said to destroy all the flies. Checking the Waste A Study in Conservation The black walnut hull, when dried and pulverized, produces a substance which gives body to the concentrated pyrethrum extract which is the essential ingredient of many insecticides. Growing Nuts in the North A Personal Story of the Author's Experience of 33 Years with Nut Culture in Minnesota and Wisconsin It is perfectly hardy, blossoms for years, the hardy pyrethrum. Trees, Fruits and Flowers of Minnesota, 1916 Embracing the Transactions of the Minnesota State Horticultural Society,Volume 44, from December 1, 1915, to December 1, 1916, Including the Twelve Numbers of "The Minnesota Horticulturist" for 1916 Extracts of pyrethrum flowers are now generally -10- available commercially, and these give fairly good results in the destruction of house flies in buildings. The House Fly and How to Suppress It U. S. Department of Agriculture Farmers' Bulletin No. 1408 Mr. Earle will try pyrethrum next season for the tarnished bug. Prairie Farmer, Vol. 56: No. 1, January 5, 1884. A Weekly Journal for the Farm, Orchard and Fireside Filled with earth, each bears a showy plant—lobelia, pyrethrum, saxifrage, or what not, with the utmost neatness, making a border; and they last eternally. About Orchids A Chat These George picked off, but he found that he could not keep up with them; so The Chief advised him to buy a little pyrethrum powder at the store. The Library of Work and Play: Gardening and Farming. On the east and south of this most exquisite picture are Iceland poppies, red pyrethrums, and here and there are clumps of dark red sweet william. Trees, Fruits and Flowers of Minnesota, 1916 Embracing the Transactions of the Minnesota State Horticultural Society,Volume 44, from December 1, 1915, to December 1, 1916, Including the Twelve Numbers of "The Minnesota Horticulturist" for 1916 Most of the sprays of pyrethrum extract contain kerosene oil as a carrier, and undoubtedly the kerosene has much to do with the toxicity of the spray. The House Fly and How to Suppress It U. S. Department of Agriculture Farmers' Bulletin No. 1408 Prof. Riley states that the insects are very readily destroyed by pyrethrum. Scientific American Supplement, No. 803, May 23, 1891 The pyrethrum powder is considered the best for this purpose, but is expensive and difficult to procure in the pure state. The Dollar Hen After the plants begin to head, pyrethrum, kerosene emulsion, or salt water may be used. Manual of Gardening (Second Edition) Important September blooming flowers are phlox, Japanese anemones; perennial asters, or Michaelmas daisy, so-called because they are supposed to be at their best on Michaelmas Day, September 29th; helleniums, helianthus, hardy chrysanthemum, pyrethrum uliginosum, boltonia. Trees, Fruits and Flowers of Minnesota, 1916 Embracing the Transactions of the Minnesota State Horticultural Society,Volume 44, from December 1, 1915, to December 1, 1916, Including the Twelve Numbers of "The Minnesota Horticulturist" for 1916 So I brought her what she sought, and she laid the pyrethrum in the pot with the vinegar and set it on the fire, till it boiled briskly. The Book of the Thousand Nights and One Night, Volume IV At the present time the pyrethrum flowers are considered by far the most valuable product of the soil of Dalmatia. Scientific American Supplement, No. 299, September 24, 1881 When a fly devours the pollen greedily from the pyrethrum, which, as we know, will prove fatal to him, it becomes clear at once that flies have no more innate sagacity than men. Youth and Egolatry Should worms cause trouble, dust the plants with a mixture of one part of pyrethrum powder to six of fine dust. Manual of Gardening (Second Edition) There is also very little information published regarding either the mode of growth or the cultivation of pyrethrum plants in their native home. Scientific American Supplement, No. 299, September 24, 1881 There are very few data at hand concerning the discovery of the insecticide properties of pyrethrum. Scientific American Supplement, No. 299, September 24, 1881 In accordance with an announcement in the March number of the Naturalist, the editor of this department has sent out the seed of two species of pyrethrum, viz. Scientific American Supplement, No. 299, September 24, 1881 |
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