Ragweed already is showing up in daily counts. The season will peak in September.
, the seasons are getting longer. “Ragweed pollen levels don’t start coming down until temperatures start coming down,” he said.pollen may remain at irritating levels “through early to mid-October.”Namely, annoying
Those particles are inhaled without incident among the majority of the population, but the immune systems of allergy sufferers treat the pollen as an invader, tormenting their bodies with mind-numbing spells of sneezing and eye irritation.A modern afflictionIt was not until the late 19th century that pollen was identified as the cause of the misery. Two researchers figured it out the hard way.
Blackley returned to the spot the next day and stirred up a pile of dust, with the same results. Examining some of the particles, he “easily” recognized pollen grains. He went on to conduct experiments on himself, inhaling more pollen and rubbing it in his eyes. the first half of the 20th century, when cities grew rapidly. Researchers have found urban residents appear to be more pollen-sensitive than their rural counterparts, who may have built immunity through more contact with plants.
What’s more, “By all criteria the effects of Operation Ragweed on the city’s pollen index are not striking,” the authors concluded.
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