Pollen and spores have also been sampled from aircrafts. Most of these samplers have nonisokinetic entrances, but some isokinetic samplers for use on light aircrafts have been developed. Upper air-spora of the atmosphere in Bangalore, India was studied by Agashe and Chatterjee (1986) by using the aircraft sampling technique. They sampled the air at 305 m, 610 m and 915 m above ground level for a period of seven months (October 1984 to April 1985) with nutrient agar Petri plates and glycerine-coated micro slides exposed to the air stream outside the cockpit of a light trainer aircraft flown at a cruising speed of 115 kmph. It is interesting to note that major types of fungal spores and pollen trapped at all the altitudes were: Cladosporium, Penicillium, Alternaría, Aspergillus, Smut spores, Uredospores and Parthenium hysterophorus, Eucalyptus species, Casuarina equisetifolia, Ricinus Communis and Poaceae. They observed that pollen grains were maximum at lower heights with minimum at 915 m.
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