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RAG WD [1 record]

Record 1 2008-12-10

English

Subject field(s)
  • Botany
  • Weed Science
  • Immunology
Universal entry(ies)
DEF

Any of various chiefly No. American weedy, herbaceous plants that constitute the genus Ambrosia and produce highly allergenic pollen responsible for much hay fever and asthma.

CONT

Every August, in certain temperate parts of North America, the ragweed plant inaugurates another season of human misery. ... A square-mile field of ragweed plants can yield sixteen tons of pollen in a year, yet only a millionth of a gram can start an allergic response of the kind that can send many of us into fits of sneezing, scratching, coughing and wheezing. Relief does not come until a few weeks before the first hard frost, when the ragweed finally withers.

OBS

ragweed; RAG WD: Term and abbreviation used at the Canadian Grain Commission.

French

Domaine(s)
  • Botanique
  • Mauvaises herbes
  • Immunologie
Entrée(s) universelle(s)
CONT

La grande et la petite herbe à poux sont les principales responsables de la fièvre des foins en Amérique du Nord.

OBS

Termes et abréviation en usage à la Commission canadienne des grains.

Spanish

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