Morus 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 Morus pollen in the air. Dates shown are given in days after January 1 and concentration is given in pollen grains per cubic meter of air.

Year

Start Date

End Date

Season Length

Peak Conc.

Date of Peak

Season Total

1987

109

128

19

169

119

674

1988

95

113

18

1948

98

6934

1989

97

110

13

802

105

4878

1990

79

134

55

229

112

1352

1991

85

113

28

881

94

7876

1992

99

117

18

175

104

764

1993

103

124

21

1197

108

5888

1994

90

114

25

1236

98

7611

1995

84

107

23

565

92

2459

1996

109

133

24

24

112

1922

             

Mean

95 (4/5)

119 (4/29)

24

745

104 (4/14)

4036

As can be seen in the table, Morus pollination began as early as March 20 (Day 79), and ended as late as May 14 (Day 134). However, the average season for airborne Morus pollen occurs between April 5 and April 29, and it is most abundant in the air around April 14. The following graph expresses the data in a manner that allows one to better visualize the conclusions drawn here.