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The name "ragweed" is derived from "ragged" + "weed," coming from the ragged appearance of the plant's leaves. [5] Other common names include bursages [ 6 ] and burrobrushes . [ 7 ] The genus name is from the Greek ambrosia , meaning "food or drink of immortality".
As of 2014 the ragweed leaf beetle, Ophraella communa, has been found south of the Alps in southern Switzerland and northern Italy. Many of the attacked plants were completely defoliated. [20] Calligrapha suturalis was introduced to Russia, and then China, for ragweed control, with very positive initial results.
Widespread seed dispersal occurs when its spiny burs fall off the plant and are carried to new habitat by people, animals, machinery, or flowing water. The plant is destructive to native and crop plants because it easily outcompetes them for light. [5] Herbicide resistant giant ragweed populations were first identified in the late 1990s. [10]
Ambrosia acanthicarpa is a North American species of bristly annual plants in the family Asteraceae.Members of the genus Ambrosia are called ragweeds.The species has common names including flatspine bur ragweed, [3] Hooker's bur-ragweed, [4] annual burrweed, annual bur-sage, and western sand-bur.
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 ...
Ambrosia deltoidea is a North American species of flowering plant in the family Asteraceae known by the common names triangle bur ragweed, triangle bursage, and triangleleaf bursage. [ 3 ] Distribution and habitat
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