Air-borne pollen grains and fungal spores at Lucknow during 1969-1970

Abstract

The atmosphere of Lucknow has been found highly charged with pollen grains and fungal spores during February, March, April and then September, October, November in the year 1969-70.

There are considerable qualitative and quantitative differences in the pollen calendar prepared earlier by Lakhanpal and Nair (1958) and the pollen calendar of 1969-70. Pollen grains of Casuarina equisetifolia (2.4%), Ricinus communis (2.2%), Emblica officinalis (1.9%), Putranjiva roxbuyghii (1.4%), etc., were not recorded earlier. The shift in the flowering periods of Morus, Ailanthus and Azadirachta has been noted by a month. Long distance transport of Alnus pollen has been noticed in the months of September and October.