Pollen Collection Date: October 14th, 2016



Sage pollen remains at moderate to high levels, but will start to decline soon. There is small amount of Chenopod weed pollen left (which include Kochia, Russian Thistle, Lambs Quarter and Careless Weed). 

Grass pollen has declined further and remains at low levels, where it will likely remain until the weather cools further. Molds, including alternaria and cladosporium are still present in moderate levels. Tree pollen is done for the year. 

On the left is chenopod weed pollen from our Sep 8th sample, which is one of the Grand Valley's worst fall pollens. The chenopod pollens include Kochia, Russian Thistle, Lambs Quarter and Careless Weed. These share a high degree of allergic cross reactivity (ie - if you're allergic to one, you're likely allergic to the other) and look nearly identical under the microscope. 

On the right is sage pollen from our Sep 1st sample. Sage is the Grand Valley's most robust fall weed pollen, often pollinating well into November. 

On the left is ragweed pollen with mold in the background from our July 28th sample. Unlike most other places in the United States, the Grand Valley grows relatively little ragweed. Our most significant pollens this time of year are the Chenopod family of weed pollens, including Kochia, Russian Thistle and Lamb's Quarter. 

(Above) Grass pollen surrounded by various types of mold spores from our June 24th sample. 

Here you can see local grass pollen in action. This video was captured May 30th, 2016, from the bank of the Colorado River near downtown Grand Junction. 

Oak pollen from May 19th. This likely originated from scrub oak, blowing all of the way from the Grand Mesa or Uncompahgre Plateau to downtown Grand Junction.

Some of the first grass pollen of the year that showed up May 3rd, 2016. Earlier than we had expected!
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