Ragweed hay fever makes thousands of people miserable every year. These people have an allergy to ragweed pollen. The characteristic symptoms include rhinitis, sneezing, nasal blockage and itching of the nose, eyes and throat. These symptoms appear in sensitive people soon after ragweed pollen is introduced into the environment. They occur every year from about the middle of August until the first frost, during the time that the wind-pollinated plant is dispersing its heavy load of pollen. The plants causing most trouble are the short ragweed, Ambrosia artemisiifolia L. var. elatior (L.) Descourtils, giant ragweed, Ambrosia trifida L., and western ragweed, Ambrosia psilostachya DC. var. coronopifolia (T. & T.) Farw. (Bassett and Frankton, 1961).
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.115548 |
| Date | January 1964 |
| Creators | Kallio, Eleanor. I. |
| Contributors | Fraser, F. (Supervisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science. (Department of Biology.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: NNNNNNNNN, Theses scanned by McGill Library. |
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