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Selecting one sex over another when planting trees can lead to an increase in pollen and allergies, one researcher says. ... the USDA cloned more than 100 maple trees, all of which were male ...
Wichita ranked first in the country on all three pollen levels: tree, grass and weed. Kansas City ranked 20th most severe out of 100 cities on tree pollen, 36th on grass pollen and 34th on weed ...
Olive pollen is most predominant in Mediterranean regions. Hay fever in Japan is caused primarily by sugi (Cryptomeria japonica) and hinoki (Chamaecyparis obtusa) tree pollen. "Allergy friendly" trees include: female ash, red maple, yellow poplar, dogwood, magnolia, double-flowered cherry, fir, spruce, and flowering plum. [26]
Low allergy ratings are considered to be 1 through 3 on the allergy scale. Mid-range ratings are 4 through 6, and high ratings are 7 through 10. Plants with ratings of 9 or 10 have an extremely high potential to cause allergic reactions.
The report looks at tree, grass and weed pollen scores, availability of board-certified allergists or immunologists and use of over-the-counter allergy medicine to determine the scores for each city.
Rhytisma acerinum is a plant pathogen that commonly affects sycamores and maples in late summer and autumn, causing tar spot.Tar spot does not usually have an adverse effect on the trees' long-term health. [1]
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Maple bark disease, or maple bark stripper’s disease, is an uncommon condition caused by exposure to the spores of C. corticale. [5] The spores are hyper-allergenic and cause a hypersensitivity pneumonitis. [6] [7] The disease has been found among workers in the paper industry employed to debark, cut and chip maple logs. The symptoms include ...