AHSC logo Allergy and Asthma in the
Southwestern United States
Information for patients with allergy and related problems
in the Southwest

Tucson Pollen Today and Tomorrow - August

Weeks 1 & 2:  Pollen counts should be relatively low at this time.  Monsoon rain will revive Ambrosia ambrosiodes (canyon ragweed) in washes and low-lying places.   Ambrosia deltoidea (triangle leaf bursage, rabbit bush) appears to be brown and dead, but will leaf out in the next few weeks.   None of these ragweeds have started to form flowers as yet.  Other species such as Palmer's Amaranth, Salsola (Russian Thistle) and Buffelgrass will grow and flower soon.  Bermuda grass and other grass species established in alleys and roadsides have greened up and will flower extensively.   The moist warm soil and higher humidity is causing mold growth, but airborne spores will soon become a problem, particularlybafter the monsoon is over and the surface layers of soil dry up.

Note:  This information is based on ongoing observation of flowering allergenic plants in the Tucson metropolitan area, and not on pollen counts.   Appearance and persistence in the air of any particular species of airborne pollen are expected to be later than the onset and duration of flowering of the plant of origin.                                                                     Back


Disclaimer:   This site is for educational purposes only.  Any information that you have found in this web site is not intended to replace medical care or advice given to you by your own physicians. You should consider consulting your local medical library and other web sites for additional information. 

Comments and suggestions welcome!   Email: schumach@u.arizona.edu
Content Owner:  Michael J. Schumacher, MB, FRACP, The University of Arizona

Updated 7-31-2013