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Chennai Pollen Watch - Cassia siamea
The above data represents the result of continuous pollen monitoring conducted between May 18 and May 24. 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 Mandpaam, Royapettah, Villivakkam and Washermenpet) 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 pollen of Cocos nucifera, Prosopis juliflora, Borassus flabellifer, Cassia siamea and Feronia elephantum in that order.
The atmosphere of Chennai was dominated by the pollen grains of Cocos nucifera and Prosopis juliflora with contributions of 33.5% and 19.8% respectively to the total pollen recorded. They occupied first and second rank continuously for the second week. The pollen grains of Borassus flabellifer contributed 9.2% and occupied the third position. The trees of Cassia siamea, in the city, are flowering and the pollen grains contributed 7.1% to the total. The other significant contributor is Feronia elephantum that contributed 5.9% to the total. The other pollen types contributed around 24.5%. A total of 22 pollen types were recorded. (Face File: Allergic conjunctivitis is a very common allergic reaction triggered by air borne antigens such as mould spores, pollen, grass, weeds, hair, wool and feathers. Karobi Lahiri et al., IJCP - Allergy and Asthma: A Clinical Primer, 1999). Compiled 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 directed to: chennaipollen1@yahoo.co.in
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Copyright
2008, Chennai Interactive
Business Services (P) Ltd. |
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Cocos nucifera (Coconut) 33.5%
Prosopis juliflora (Velikaruvel) 19.8%
Borassus flabellifer (Panai Maram) 9.2%
Cassia siamea (Manjakkonai) 7.1%
Feronia elephantum (Vilampazlem) - 5.9%
Others - 24.5%
