Abstract
Abstract The amount of airborne pollen in Kuwait was sampled daily over a twelve year period using a Hirst volumetric spore trap. The pollen was identified and expressed at the mean number m-33 day-1. Pollen occurs throughout the year but the concentration of the various pollen types varied from year-to-year and from season-to-season. The highest counts were in 1978, and the lowest in 1986. This latter low value is the result of prolonged drought, intensive human interference and continuous grazing. The highest counts are recorded in the spring (April-May) and the autumn (September-October). The pollen spectrum comprises mainly: Chenopodiaceae, Prosopis, Cyperus, Poaceae, Plantago and Brassicaceae. Poaceae pollen is abundant during the spring and the high valves coincide with the flowering season of the annual and perennial grass species. Cyperus is also abundant in the spring (April-May) the major source being the perennial sedge, Cyperus conglomeratus. Chenopodiaceae dominates from June to November with the highest peak in September and October. The majority of the species belonging to this family are perennials which flower during summer and autumn. Prosopis shows 2 peaks: a lower one in May-June and a higher one in October. A calendar of airborne pollen grain is presented. These results coulf be of use in allergy cases in Kuwait and possibly also in adjacent countries (S. Iraq, NE Saudi Arabia).
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