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Pollen Watch - Azadirachta indica continues to dominate
This data represents the result of continuous pollen monitoring conducted between April 6 and April 12. The monitoring is done by exposing adhesive coated glass cylinder in the vertical cylinder trap for a period of 24 hours, installed at a height of 15 metres in 5 different zones (Anna Nagar, Gandhi Mandapam, Royapettah, Villivakkam and Washermanpet)
The pollen grains of Azadirachta indica continue to dominate the atmosphere of Chennai with a contribution of 32%. This was closely followed by Cocos nucifera with 30.7%. The pollens of Feronia elephantum and Prosopis juliflora occupied third and fourth positions respectively in their dominance with contributions of 11.8 and 10.7%. The trees of Borassus are in the flowering period and their pollen grains are significantly seen/felt (5.9%) in the atmosphere of Chennai. The other pollen types contributed to around 8.9%. A total of 18 pollen types were recorded. (Fact file: Skin prick test conducted for pollen allergy among 1483 persons showed 10.8% positive nature - Shaikh WA, IJCP - Allergy and Asthma: A clinical primer, 1999) Complied by: V. Raju, B.P.R. Vittal, N.K. Udaya Prakash, T. Janaki and S. Bhuveneswari. Asthma and Allergy research institute, Raju Hospital, T. Nagar, Chennai - 600 017. Centre for advanced studies in Botany, University of Madras, Guindy Campus, Chennai - 600 025. Queries can be directed to: chennaipollen1@yahoo.co.in |
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Copyright
2009, Chennai Interactive
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Azadirachta indica (Neem) 32.0%
Cocos Nucifera (Coconut) 30.7%
Feronia elephantum (Vilampazham) 11.8%
Prosopis juliflora (Velikaruvel) 10.7%
Borassus sp. (Palm) 5.9%
Others 8.9%
in the city of Chennai. The results are presented as mean of all five sites. Though the atmosphere of Chennai consists of a large number of pollen types only a few are represented in the data according to their dominance. The report shows the predominance of the pollens Azadirachta indica, Cocos nucifera, Feronia elephantum, Prosopis juliflora and Borassus sp. in that order.
