ABSTRACT
This chapter deals with the study of all aspects of aeropollen studies. It is a general practice to group airborne pollen on the basis of habit of their plant sources such as trees, grasses and weeds. A review of aeropalynology in Britain was published by H. A. Hyde. It has also been found that the allergy symptoms are more severe when there is a change in the weather. The environmental conditions are known to be important for the release, dispersion, transportation and removal of pollen from the atmosphere. Rast studies were carried out with the help of sera of the patients and the pollen extracts of Parthenium hysterophorus and Ambrosia. A number of conclusions were drawn from these studies. For the determination of pollen count, undehisced anthers from unopened disc florets of Parthenium were placed in a haemocytometer, covered with a cover glass and microscopically examined to count the number of pollen per anther.
