Ragweed

Ragweed is a plant genus that belongs to the Asteraceae family. The genus is known as Ambrosia in scientific terms. Ragweed plants are native to North America and South America, but they have also spread to other parts of the world. They are known for their role in causing hay fever.

Description

Ragweed plants are annuals or perennials. They have erect stems and alternate, deeply lobed leaves. The plants produce small, greenish flowers in late summer and early fall. The flowers release large amounts of pollen, which is a common allergen.

Allergy

Ragweed pollen is one of the most common causes of allergic rhinitis, also known as hay fever. The pollen is released into the air and can be inhaled, causing symptoms such as sneezing, runny nose, and itchy eyes. Ragweed allergy can also trigger asthma attacks in people with the condition.

Control

Control of ragweed is important to reduce the impact of hay fever. This can be achieved through various methods, including mowing, herbicides, and biological control. In some areas, ragweed is considered an invasive species and efforts are made to eradicate it.

Species

There are about 50 species of ragweed. Some of the most common ones include:

• Ambrosia artemisiifolia – Common ragweed
• Ambrosia trifida – Giant ragweed
• Ambrosia psilostachya – Western ragweed
• Ambrosia tenuifolia – Slender ragweed

See also

• List of Lepidoptera that feed on ragweeds
• Allergenic extract

External links

• Ragweed and its allergenicity
• Ragweed on Britannica

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Ragweed

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  Ambrosia psilostachya

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  Ambrosia artemisiifolia

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  Ambrosia dumosa

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  Ambrosia chamissonis

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  Ambrosia ambrosioides

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  Ambrosia trifida