Carya Pollen

The study from which the following data was taken examined the timing and concentration of airborne pollen from 1987 to 1996 to determine the spring pollination periods of several types of pollen. To learn more about this study click here. The table shown here gives information regarding the concentration of Carya pollen in the air. Dates are given in days after January 1 and concentration is measured as pollen grains per cubic meter of air.

Year

Start Date

End Date

Season Length

Peak Conc.

Date of Peak

Season Total

1987

115

135

20

73

120

570

1988

112

142

30

113

132

984

1989

111

141

30

107

138

456

1990

118

147

29

124

135

657

1991

105

134

29

186

131

1504

1992

121

148

27

102

141

1447

1993

113

141

28

96

132

415

1994

110

145

35

152

130

869

1995

106

147

41

175

135

723

1996

121

141

20

147

128

1217

             

Mean

113 (4/23)

142 (5/22)

32

128

132 (5/12)

884

As can be seen in the table, Carya pollination began as early as April 15 (Day 105), and ended as late as May 28 (Day 148). However, the average season for airborne Carya pollen occurs between April 23 and May 22, and it is most abundant in the air around May 12.The following graph expresses the data in a manner that allows one to better visualize the conclusions drawn here.