Controlling Ragweed Ragweed can be controlled using biological, mechanical, and chemical techniques. The main allergenic culprit in the fall is ragweed, a yellow-flowering weed often seen growing in agricultural areas or along highways. How to Identify the Ragweed Plant Ragweed grows the best in sunny, newly-disturbed soils, free from competition with other weeds and grasses. Ragweed Ragweed pollen cross react with almost all other composites, especially with mugwort pollen. Further cross reactions are known with dandelion, goldenrod, sun flower, chamomilla, and all the daisy-like flowers.
Most people are unaware of how ragweed actually looks.
Although the ragweed pollen season runs from August to November, ragweed pollen levels usually peak in Mid September in many areas in the United States. The Weather Channel offers a United States color coded map to depict concentrations of ragweed pollen. Fall allergy season starts Aug. 15 for most of the United States, say experts at the National Allergy Bureau. As ragweed begins rearing its ugly head this fall, nasal allergy sufferers may wish to take a more serious look at treating their disease. Survive Ragweed by Limiting Exposure Ragweed and hayfever have become synonymous in people's minds, especially during the cool Fall months.