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Although each ragweed plant only survives for a single season, it can produce up to 1 billion — yes, billion — pollen grains, making life miserable for the 23 million Americans with a ragweed ...
The latest forecast for the Sacramento area calls for high pollen levels, according to the Weather Channel. Tuesday’s pollen count is expected to be high, the forecast said.
Ragweed pollen is a common allergen. A single plant may produce about a billion grains of pollen per season, [ 11 ] [ 12 ] and the pollen is transported on the wind. It causes about half of all cases of pollen-associated allergic rhinitis in North America, where ragweeds are most abundant and diverse. [ 8 ]
Pollen.com, a pollen index website, is forecasting levels in the Sacramento area at high and medium-high over the next five days. Pollen levels range from zero (low) to 12 (high).
A pollen count is a measurement of the number of pollen grains in a given volume of air. Pollen counts, and forecasts of pollen conditions, are routinely produced and reported to the public because high aerial pollen concentration is associated with increased rates of allergic reaction for those with conditions such as hay fever and asthma .
They freely expel a myriad of these pollen grains, and only a small percentage of them ends up captured by the female floral structures on wind-pollinated plants. [3] They are typically 20–60 micrometres (0.0008–0.0024 in) in diameter, although the pollen grains of Pinus species can be much larger and much less dense. [ 1 ]
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Ambrosia trifida, the giant ragweed, is a species of flowering plant in the family Asteraceae. It is native to North America , where it is widespread in Canada , the United States , and northern Mexico .
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